<?xml version="1.0" encoding="UTF-8"?>

<!--XBRL Document Created with the Workiva Platform-->
<!--Copyright 2026 Workiva-->
<!--r:019e6f15-0a15-76a5-b4ff-ba418c03c835,g:e17a0108-9719-4d15-98ae-5aefef0d8226-->
<link:linkbase xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd">
  <link:arcroleRef arcroleURI="https://xbrl.org/2023/arcrole/summation-item" xlink:type="simple" xlink:href="https://www.xbrl.org/2023/calculation-1.1.xsd#summation-item"/>
  <link:roleRef roleURI="http://www.parknationalbank.com/role/ConsolidatedCondensedBalanceSheetsUnaudited" xlink:type="simple" xlink:href="prk-20260630.xsd#ConsolidatedCondensedBalanceSheetsUnaudited"/>
  <link:calculationLink xlink:role="http://www.parknationalbank.com/role/ConsolidatedCondensedBalanceSheetsUnaudited" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_019e6f15-0fc1-7914-b229-ca1cd6268f61" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValue"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashAndDueFromBanks_019e6f15-0fc1-711c-a87a-a8ad6c4b649e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CashAndDueFromBanks"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_019e6f15-0fc1-7914-b229-ca1cd6268f61" xlink:to="loc_us-gaap_CashAndDueFromBanks_019e6f15-0fc1-711c-a87a-a8ad6c4b649e" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MoneyMarketFundsAtCarryingValue_019e6f15-0fc1-7246-abe8-1399ec62952d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_MoneyMarketFundsAtCarryingValue"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_019e6f15-0fc1-7914-b229-ca1cd6268f61" xlink:to="loc_us-gaap_MoneyMarketFundsAtCarryingValue_019e6f15-0fc1-7246-abe8-1399ec62952d" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Liabilities_019e6f15-0fc1-71b1-9ffd-8a78d2c39545" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_Liabilities"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Deposits_019e6f15-0fc1-7699-949c-4adb33760c19" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_Deposits"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_Liabilities_019e6f15-0fc1-71b1-9ffd-8a78d2c39545" xlink:to="loc_us-gaap_Deposits_019e6f15-0fc1-7699-949c-4adb33760c19" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AffordableHousingProgramObligation_019e6f15-0fc1-7629-8bb6-ba25fe31d43f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AffordableHousingProgramObligation"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_Liabilities_019e6f15-0fc1-71b1-9ffd-8a78d2c39545" xlink:to="loc_us-gaap_AffordableHousingProgramObligation_019e6f15-0fc1-7629-8bb6-ba25fe31d43f" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShortTermBorrowings_019e6f15-0fc1-7469-af26-8478a7676a6e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShortTermBorrowings"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_Liabilities_019e6f15-0fc1-71b1-9ffd-8a78d2c39545" xlink:to="loc_us-gaap_ShortTermBorrowings_019e6f15-0fc1-7469-af26-8478a7676a6e" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestPayableCurrentAndNoncurrent_019e6f15-0fc1-79bd-8449-7fe788fda791" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InterestPayableCurrentAndNoncurrent"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_Liabilities_019e6f15-0fc1-71b1-9ffd-8a78d2c39545" xlink:to="loc_us-gaap_InterestPayableCurrentAndNoncurrent_019e6f15-0fc1-79bd-8449-7fe788fda791" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubordinatedDebt_019e6f15-0fc1-7504-8937-8c9d3720c40d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SubordinatedDebt"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_Liabilities_019e6f15-0fc1-71b1-9ffd-8a78d2c39545" xlink:to="loc_us-gaap_SubordinatedDebt_019e6f15-0fc1-7504-8937-8c9d3720c40d" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OffBalanceSheetCreditLossLiability_019e6f15-0fc1-7d25-b96e-03335744dba6" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OffBalanceSheetCreditLossLiability"/>
    <link:calculationArc order="6" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_Liabilities_019e6f15-0fc1-71b1-9ffd-8a78d2c39545" xlink:to="loc_us-gaap_OffBalanceSheetCreditLossLiability_019e6f15-0fc1-7d25-b96e-03335744dba6" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherLiabilities_019e6f15-0fc1-7bd3-9b34-df4e03008fbf" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherLiabilities"/>
    <link:calculationArc order="7" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_Liabilities_019e6f15-0fc1-71b1-9ffd-8a78d2c39545" xlink:to="loc_us-gaap_OtherLiabilities_019e6f15-0fc1-7bd3-9b34-df4e03008fbf" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseLiability_019e6f15-0fc1-755f-a9ec-4bf625c21ad7" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OperatingLeaseLiability"/>
    <link:calculationArc order="8" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_Liabilities_019e6f15-0fc1-71b1-9ffd-8a78d2c39545" xlink:to="loc_us-gaap_OperatingLeaseLiability_019e6f15-0fc1-755f-a9ec-4bf625c21ad7" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Deposits_019e6f15-1088-7c68-b41f-93f91be814ba" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_Deposits"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NoninterestBearingDepositLiabilities_019e6f15-1088-7403-ba37-4d7756c95065" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NoninterestBearingDepositLiabilities"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_Deposits_019e6f15-1088-7c68-b41f-93f91be814ba" xlink:to="loc_us-gaap_NoninterestBearingDepositLiabilities_019e6f15-1088-7403-ba37-4d7756c95065" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestBearingDepositLiabilities_019e6f15-1088-7ba8-81f6-417ba22f315f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InterestBearingDepositLiabilities"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_Deposits_019e6f15-1088-7c68-b41f-93f91be814ba" xlink:to="loc_us-gaap_InterestBearingDepositLiabilities_019e6f15-1088-7ba8-81f6-417ba22f315f" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Assets_019e6f15-1088-7b69-a783-70416688c777" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_Assets"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_019e6f15-1088-75ce-a562-a176c60da4bf" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValue"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_019e6f15-1088-7b69-a783-70416688c777" xlink:to="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_019e6f15-1088-75ce-a562-a176c60da4bf" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Investments_019e6f15-1088-71d6-99cd-4f01c54c3702" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_Investments"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_019e6f15-1088-7b69-a783-70416688c777" xlink:to="loc_us-gaap_Investments_019e6f15-1088-71d6-99cd-4f01c54c3702" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NotesReceivableNet_019e6f15-1088-7d30-adcd-35bb7d9843ef" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NotesReceivableNet"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_019e6f15-1088-7b69-a783-70416688c777" xlink:to="loc_us-gaap_NotesReceivableNet_019e6f15-1088-7d30-adcd-35bb7d9843ef" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BankOwnedLifeInsurance_019e6f15-1088-7c2e-a0c9-46adc75466e7" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BankOwnedLifeInsurance"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_019e6f15-1088-7b69-a783-70416688c777" xlink:to="loc_us-gaap_BankOwnedLifeInsurance_019e6f15-1088-7c2e-a0c9-46adc75466e7" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PrepaidExpenseAndOtherAssets_019e6f15-1088-76bf-8100-012fa9ef9e77" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PrepaidExpenseAndOtherAssets"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_019e6f15-1088-7b69-a783-70416688c777" xlink:to="loc_us-gaap_PrepaidExpenseAndOtherAssets_019e6f15-1088-76bf-8100-012fa9ef9e77" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Goodwill_019e6f15-1088-75ae-885f-65c7efe59143" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_Goodwill"/>
    <link:calculationArc order="6" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_019e6f15-1088-7b69-a783-70416688c777" xlink:to="loc_us-gaap_Goodwill_019e6f15-1088-75ae-885f-65c7efe59143" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IntangibleAssetsNetExcludingGoodwill_019e6f15-1088-714b-ac1d-27fa06eaf148" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IntangibleAssetsNetExcludingGoodwill"/>
    <link:calculationArc order="7" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_019e6f15-1088-7b69-a783-70416688c777" xlink:to="loc_us-gaap_IntangibleAssetsNetExcludingGoodwill_019e6f15-1088-714b-ac1d-27fa06eaf148" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentNet_019e6f15-1088-7ca9-a2ce-bcb9a40eabe9" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PropertyPlantAndEquipmentNet"/>
    <link:calculationArc order="8" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_019e6f15-1088-7b69-a783-70416688c777" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentNet_019e6f15-1088-7ca9-a2ce-bcb9a40eabe9" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AmortizationMethodQualifiedAffordableHousingProjectInvestments_019e6f15-1088-7be2-9314-18cebcbee1e8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AmortizationMethodQualifiedAffordableHousingProjectInvestments"/>
    <link:calculationArc order="9" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_019e6f15-1088-7b69-a783-70416688c777" xlink:to="loc_us-gaap_AmortizationMethodQualifiedAffordableHousingProjectInvestments_019e6f15-1088-7be2-9314-18cebcbee1e8" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherRealEstateAndForeclosedAssets_019e6f15-1088-71ad-a914-81bf1d92b06c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherRealEstateAndForeclosedAssets"/>
    <link:calculationArc order="10" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_019e6f15-1088-7b69-a783-70416688c777" xlink:to="loc_us-gaap_OtherRealEstateAndForeclosedAssets_019e6f15-1088-71ad-a914-81bf1d92b06c" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestReceivable_019e6f15-1088-717b-bc2e-5f83d6d742bf" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InterestReceivable"/>
    <link:calculationArc order="11" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_019e6f15-1088-7b69-a783-70416688c777" xlink:to="loc_us-gaap_InterestReceivable_019e6f15-1088-717b-bc2e-5f83d6d742bf" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseRightOfUseAsset_019e6f15-1088-784d-8af3-9c4aa090c1d1" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OperatingLeaseRightOfUseAsset"/>
    <link:calculationArc order="12" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_019e6f15-1088-7b69-a783-70416688c777" xlink:to="loc_us-gaap_OperatingLeaseRightOfUseAsset_019e6f15-1088-784d-8af3-9c4aa090c1d1" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ServicingAsset_019e6f15-1088-75a7-a81e-d08bd805043a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ServicingAsset"/>
    <link:calculationArc order="13" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_019e6f15-1088-7b69-a783-70416688c777" xlink:to="loc_us-gaap_ServicingAsset_019e6f15-1088-75a7-a81e-d08bd805043a" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherAssets_019e6f15-1088-7131-a771-47af92fb7feb" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherAssets"/>
    <link:calculationArc order="14" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_019e6f15-1088-7b69-a783-70416688c777" xlink:to="loc_us-gaap_OtherAssets_019e6f15-1088-7131-a771-47af92fb7feb" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NotesReceivableNet_019e6f15-0fc1-7dda-ba10-a6337c5ae988" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NotesReceivableNet"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NotesReceivableGross_019e6f15-0fc1-728d-8cd9-0994b2287f74" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NotesReceivableGross"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NotesReceivableNet_019e6f15-0fc1-7dda-ba10-a6337c5ae988" xlink:to="loc_us-gaap_NotesReceivableGross_019e6f15-0fc1-728d-8cd9-0994b2287f74" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest_019e6f15-0fc1-7b06-b56c-2e99767100da" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NotesReceivableNet_019e6f15-0fc1-7dda-ba10-a6337c5ae988" xlink:to="loc_us-gaap_FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest_019e6f15-0fc1-7b06-b56c-2e99767100da" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Investments_019e6f15-0fc1-7afc-899c-e1b2d91af16a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_Investments"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtSecuritiesCurrent_019e6f15-0fc1-7722-a576-0761af9874b1" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AvailableForSaleSecuritiesDebtSecuritiesCurrent"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_Investments_019e6f15-0fc1-7afc-899c-e1b2d91af16a" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesDebtSecuritiesCurrent_019e6f15-0fc1-7722-a576-0761af9874b1" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherInvestmentsAndSecuritiesAtCost_019e6f15-0fc1-7a14-a913-79a856625787" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherInvestmentsAndSecuritiesAtCost"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_Investments_019e6f15-0fc1-7afc-899c-e1b2d91af16a" xlink:to="loc_us-gaap_OtherInvestmentsAndSecuritiesAtCost_019e6f15-0fc1-7a14-a913-79a856625787" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesAndStockholdersEquity_019e6f15-0fc1-72c1-8639-4cb9c13532d0" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LiabilitiesAndStockholdersEquity"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Liabilities_019e6f15-0fc1-7091-a679-6a2c39706bf6" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_Liabilities"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquity_019e6f15-0fc1-72c1-8639-4cb9c13532d0" xlink:to="loc_us-gaap_Liabilities_019e6f15-0fc1-7091-a679-6a2c39706bf6" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_019e6f15-1088-75c1-8da4-e4dbf26e7f6d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquity_019e6f15-0fc1-72c1-8639-4cb9c13532d0" xlink:to="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_019e6f15-1088-75c1-8da4-e4dbf26e7f6d" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.parknationalbank.com/role/ConsolidatedCondensedStatementsOfIncome" xlink:type="simple" xlink:href="prk-20260630.xsd#ConsolidatedCondensedStatementsOfIncome"/>
  <link:calculationLink xlink:role="http://www.parknationalbank.com/role/ConsolidatedCondensedStatementsOfIncome" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestExpenseOperating_019e6f15-1088-7fee-9173-abcf661bde95" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InterestExpenseOperating"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestExpenseNOWAccountsMoneyMarketAccountsAndSavingsDeposits_019e6f15-1088-774b-9457-9a06b2658d09" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InterestExpenseNOWAccountsMoneyMarketAccountsAndSavingsDeposits"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_InterestExpenseOperating_019e6f15-1088-7fee-9173-abcf661bde95" xlink:to="loc_us-gaap_InterestExpenseNOWAccountsMoneyMarketAccountsAndSavingsDeposits_019e6f15-1088-774b-9457-9a06b2658d09" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestExpenseTimeDeposits_019e6f15-1088-762c-890b-827648477ed6" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InterestExpenseTimeDeposits"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_InterestExpenseOperating_019e6f15-1088-7fee-9173-abcf661bde95" xlink:to="loc_us-gaap_InterestExpenseTimeDeposits_019e6f15-1088-762c-890b-827648477ed6" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestExpenseShortTermBorrowings_019e6f15-1088-7221-9d61-6a7d21c9334b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InterestExpenseShortTermBorrowings"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_InterestExpenseOperating_019e6f15-1088-7fee-9173-abcf661bde95" xlink:to="loc_us-gaap_InterestExpenseShortTermBorrowings_019e6f15-1088-7221-9d61-6a7d21c9334b" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestExpenseLongTermDebt_019e6f15-1088-759c-a994-76b06756c448" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InterestExpenseLongTermDebt"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_InterestExpenseOperating_019e6f15-1088-7fee-9173-abcf661bde95" xlink:to="loc_us-gaap_InterestExpenseLongTermDebt_019e6f15-1088-759c-a994-76b06756c448" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestIncomeExpenseAfterProvisionForLoanLoss_019e6f15-1088-781e-b422-b0976d641192" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InterestIncomeExpenseAfterProvisionForLoanLoss"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestIncomeExpenseNet_019e6f15-1088-7460-9794-6e103c37e37a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InterestIncomeExpenseNet"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_InterestIncomeExpenseAfterProvisionForLoanLoss_019e6f15-1088-781e-b422-b0976d641192" xlink:to="loc_us-gaap_InterestIncomeExpenseNet_019e6f15-1088-7460-9794-6e103c37e37a" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProvisionForLoanLossesExpensed_019e6f15-1088-771b-8026-e5b4529fbc5e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ProvisionForLoanLossesExpensed"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_InterestIncomeExpenseAfterProvisionForLoanLoss_019e6f15-1088-781e-b422-b0976d641192" xlink:to="loc_us-gaap_ProvisionForLoanLossesExpensed_019e6f15-1088-771b-8026-e5b4529fbc5e" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_019e6f15-1088-718b-bede-ad5b029c44e3" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NetIncomeLoss"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_019e6f15-1088-7fb0-9828-5171b999ae88" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetIncomeLoss_019e6f15-1088-718b-bede-ad5b029c44e3" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_019e6f15-1088-7fb0-9828-5171b999ae88" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_019e6f15-1088-793d-b3f0-df2e5aadf380" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncomeTaxExpenseBenefit"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetIncomeLoss_019e6f15-1088-718b-bede-ad5b029c44e3" xlink:to="loc_us-gaap_IncomeTaxExpenseBenefit_019e6f15-1088-793d-b3f0-df2e5aadf380" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NoninterestExpense_019e6f15-1088-7524-959c-88e16dedddfd" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NoninterestExpense"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LaborAndRelatedExpense_019e6f15-1088-72e2-bffc-abd58dd0bc81" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LaborAndRelatedExpense"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NoninterestExpense_019e6f15-1088-7524-959c-88e16dedddfd" xlink:to="loc_us-gaap_LaborAndRelatedExpense_019e6f15-1088-72e2-bffc-abd58dd0bc81" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeBenefitsAndShareBasedCompensation_019e6f15-1088-7bf8-bb0f-f42583e55d84" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EmployeeBenefitsAndShareBasedCompensation"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NoninterestExpense_019e6f15-1088-7524-959c-88e16dedddfd" xlink:to="loc_us-gaap_EmployeeBenefitsAndShareBasedCompensation_019e6f15-1088-7bf8-bb0f-f42583e55d84" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OccupancyNet_019e6f15-1088-727b-abc4-cec91822cf96" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OccupancyNet"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NoninterestExpense_019e6f15-1088-7524-959c-88e16dedddfd" xlink:to="loc_us-gaap_OccupancyNet_019e6f15-1088-727b-abc4-cec91822cf96" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquipmentExpense_019e6f15-1088-7101-b69e-b12314493e39" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EquipmentExpense"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NoninterestExpense_019e6f15-1088-7524-959c-88e16dedddfd" xlink:to="loc_us-gaap_EquipmentExpense_019e6f15-1088-7101-b69e-b12314493e39" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InformationTechnologyAndDataProcessing_019e6f15-1088-7084-9b3f-d7adeebd0fc3" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InformationTechnologyAndDataProcessing"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NoninterestExpense_019e6f15-1088-7524-959c-88e16dedddfd" xlink:to="loc_us-gaap_InformationTechnologyAndDataProcessing_019e6f15-1088-7084-9b3f-d7adeebd0fc3" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProfessionalFees_019e6f15-1088-70e7-bf4f-902b97b2896e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ProfessionalFees"/>
    <link:calculationArc order="6" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NoninterestExpense_019e6f15-1088-7524-959c-88e16dedddfd" xlink:to="loc_us-gaap_ProfessionalFees_019e6f15-1088-70e7-bf4f-902b97b2896e" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MarketingExpense_019e6f15-1088-793c-8c06-88a3d5f933db" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_MarketingExpense"/>
    <link:calculationArc order="7" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NoninterestExpense_019e6f15-1088-7524-959c-88e16dedddfd" xlink:to="loc_us-gaap_MarketingExpense_019e6f15-1088-793c-8c06-88a3d5f933db" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GeneralInsuranceExpense_019e6f15-1088-7eb8-b8c5-7d60b0b64b6c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_GeneralInsuranceExpense"/>
    <link:calculationArc order="8" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NoninterestExpense_019e6f15-1088-7524-959c-88e16dedddfd" xlink:to="loc_us-gaap_GeneralInsuranceExpense_019e6f15-1088-7eb8-b8c5-7d60b0b64b6c" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Communication_019e6f15-1088-7806-9355-932d9c97fd43" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_Communication"/>
    <link:calculationArc order="9" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NoninterestExpense_019e6f15-1088-7524-959c-88e16dedddfd" xlink:to="loc_us-gaap_Communication_019e6f15-1088-7806-9355-932d9c97fd43" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ExciseAndSalesTaxes_019e6f15-1088-78eb-bb77-dbf2f5d3ccea" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ExciseAndSalesTaxes"/>
    <link:calculationArc order="10" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NoninterestExpense_019e6f15-1088-7524-959c-88e16dedddfd" xlink:to="loc_us-gaap_ExciseAndSalesTaxes_019e6f15-1088-78eb-bb77-dbf2f5d3ccea" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AmortizationOfIntangibleAssets_019e6f15-1088-75f8-a3c7-a6bfcfb79bf3" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AmortizationOfIntangibleAssets"/>
    <link:calculationArc order="11" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NoninterestExpense_019e6f15-1088-7524-959c-88e16dedddfd" xlink:to="loc_us-gaap_AmortizationOfIntangibleAssets_019e6f15-1088-75f8-a3c7-a6bfcfb79bf3" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherCostAndExpenseOperating_019e6f15-1088-758a-af69-c20f2060eb85" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherCostAndExpenseOperating"/>
    <link:calculationArc order="12" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NoninterestExpense_019e6f15-1088-7524-959c-88e16dedddfd" xlink:to="loc_us-gaap_OtherCostAndExpenseOperating_019e6f15-1088-758a-af69-c20f2060eb85" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NoninterestIncome_019e6f15-1088-7057-8471-e01a44c952e1" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NoninterestIncome"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerIncludingAssessedTax_019e6f15-1088-7185-bd1e-5fe585f4819a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RevenueFromContractWithCustomerIncludingAssessedTax"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NoninterestIncome_019e6f15-1088-7057-8471-e01a44c952e1" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerIncludingAssessedTax_019e6f15-1088-7185-bd1e-5fe585f4819a" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_prk_DebitCardFeeIncome_019e6f15-1088-780e-ba5f-8ec5b3762368" xlink:href="prk-20260630.xsd#prk_DebitCardFeeIncome"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NoninterestIncome_019e6f15-1088-7057-8471-e01a44c952e1" xlink:to="loc_prk_DebitCardFeeIncome_019e6f15-1088-780e-ba5f-8ec5b3762368" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BankOwnedLifeInsuranceIncome_019e6f15-1088-7b43-963b-727540d8a5ad" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BankOwnedLifeInsuranceIncome"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NoninterestIncome_019e6f15-1088-7057-8471-e01a44c952e1" xlink:to="loc_us-gaap_BankOwnedLifeInsuranceIncome_019e6f15-1088-7b43-963b-727540d8a5ad" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_prk_AtmFees_019e6f15-1088-7369-9d9b-b0a5d8c1f087" xlink:href="prk-20260630.xsd#prk_AtmFees"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NoninterestIncome_019e6f15-1088-7057-8471-e01a44c952e1" xlink:to="loc_prk_AtmFees_019e6f15-1088-7369-9d9b-b0a5d8c1f087" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleGainLoss_019e6f15-1088-790f-b92c-242d6d766a29" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtSecuritiesAvailableForSaleGainLoss"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NoninterestIncome_019e6f15-1088-7057-8471-e01a44c952e1" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleGainLoss_019e6f15-1088-790f-b92c-242d6d766a29" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquitySecuritiesFvNiUnrealizedGainLoss_019e6f15-1088-7698-ae98-6d91ab294f00" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EquitySecuritiesFvNiUnrealizedGainLoss"/>
    <link:calculationArc order="6" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NoninterestIncome_019e6f15-1088-7057-8471-e01a44c952e1" xlink:to="loc_us-gaap_EquitySecuritiesFvNiUnrealizedGainLoss_019e6f15-1088-7698-ae98-6d91ab294f00" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetPeriodicDefinedBenefitsExpenseReversalOfExpenseExcludingServiceCostComponent_019e6f15-1088-77b8-b863-1f116913feae" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NetPeriodicDefinedBenefitsExpenseReversalOfExpenseExcludingServiceCostComponent"/>
    <link:calculationArc order="7" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NoninterestIncome_019e6f15-1088-7057-8471-e01a44c952e1" xlink:to="loc_us-gaap_NetPeriodicDefinedBenefitsExpenseReversalOfExpenseExcludingServiceCostComponent_019e6f15-1088-77b8-b863-1f116913feae" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NoninterestIncomeOther_019e6f15-1088-7621-bd0e-ef77e340d69b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NoninterestIncomeOther"/>
    <link:calculationArc order="8" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NoninterestIncome_019e6f15-1088-7057-8471-e01a44c952e1" xlink:to="loc_us-gaap_NoninterestIncomeOther_019e6f15-1088-7621-bd0e-ef77e340d69b" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestAndDividendIncomeOperating_019e6f15-1088-71a3-812c-c12edd088afc" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InterestAndDividendIncomeOperating"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestAndFeeIncomeLoansAndLeases_019e6f15-1088-7852-b4b2-590fa6e600c8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InterestAndFeeIncomeLoansAndLeases"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_InterestAndDividendIncomeOperating_019e6f15-1088-71a3-812c-c12edd088afc" xlink:to="loc_us-gaap_InterestAndFeeIncomeLoansAndLeases_019e6f15-1088-7852-b4b2-590fa6e600c8" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestIncomeSecuritiesTaxable_019e6f15-1088-70fc-9407-06f4fee8c388" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InterestIncomeSecuritiesTaxable"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_InterestAndDividendIncomeOperating_019e6f15-1088-71a3-812c-c12edd088afc" xlink:to="loc_us-gaap_InterestIncomeSecuritiesTaxable_019e6f15-1088-70fc-9407-06f4fee8c388" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestIncomeSecuritiesStateAndMunicipal_019e6f15-1088-729b-ab8d-b9822c5d59e1" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InterestIncomeSecuritiesStateAndMunicipal"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_InterestAndDividendIncomeOperating_019e6f15-1088-71a3-812c-c12edd088afc" xlink:to="loc_us-gaap_InterestIncomeSecuritiesStateAndMunicipal_019e6f15-1088-729b-ab8d-b9822c5d59e1" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherInterestAndDividendIncome_019e6f15-1088-7d8a-b55e-07d1ea47631c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherInterestAndDividendIncome"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_InterestAndDividendIncomeOperating_019e6f15-1088-71a3-812c-c12edd088afc" xlink:to="loc_us-gaap_OtherInterestAndDividendIncome_019e6f15-1088-7d8a-b55e-07d1ea47631c" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_019e6f15-1088-7ca5-835d-db3c98355b4e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NoninterestExpense_019e6f15-1088-7769-a574-9e8a7954963b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NoninterestExpense"/>
    <link:calculationArc order="1" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_019e6f15-1088-7ca5-835d-db3c98355b4e" xlink:to="loc_us-gaap_NoninterestExpense_019e6f15-1088-7769-a574-9e8a7954963b" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestIncomeExpenseAfterProvisionForLoanLoss_019e6f15-1088-7c55-a255-6c6e02dd06ae" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InterestIncomeExpenseAfterProvisionForLoanLoss"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_019e6f15-1088-7ca5-835d-db3c98355b4e" xlink:to="loc_us-gaap_InterestIncomeExpenseAfterProvisionForLoanLoss_019e6f15-1088-7c55-a255-6c6e02dd06ae" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NoninterestIncome_019e6f15-1088-7fb7-bbb8-3343ce4360b7" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NoninterestIncome"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_019e6f15-1088-7ca5-835d-db3c98355b4e" xlink:to="loc_us-gaap_NoninterestIncome_019e6f15-1088-7fb7-bbb8-3343ce4360b7" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestIncomeExpenseNet_019e6f15-1088-74b0-98d7-2af9430ff72c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InterestIncomeExpenseNet"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestAndDividendIncomeOperating_019e6f15-1088-713f-9a7e-34094fe4e17c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InterestAndDividendIncomeOperating"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_InterestIncomeExpenseNet_019e6f15-1088-74b0-98d7-2af9430ff72c" xlink:to="loc_us-gaap_InterestAndDividendIncomeOperating_019e6f15-1088-713f-9a7e-34094fe4e17c" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestExpenseOperating_019e6f15-1088-707e-b2c3-bbb580080f56" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InterestExpenseOperating"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_InterestIncomeExpenseNet_019e6f15-1088-74b0-98d7-2af9430ff72c" xlink:to="loc_us-gaap_InterestExpenseOperating_019e6f15-1088-707e-b2c3-bbb580080f56" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.parknationalbank.com/role/ConsolidatedCondensedStatementsofComprehensiveIncome" xlink:type="simple" xlink:href="prk-20260630.xsd#ConsolidatedCondensedStatementsofComprehensiveIncome"/>
  <link:calculationLink xlink:role="http://www.parknationalbank.com/role/ConsolidatedCondensedStatementsofComprehensiveIncome" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax_019faf65-b8bf-7ac5-b1a1-4683b696163d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax_019faf65-b8bf-726d-bc3c-60be6ce560c5" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax_019faf65-b8bf-7ac5-b1a1-4683b696163d" xlink:to="loc_us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax_019faf65-b8bf-726d-bc3c-60be6ce560c5" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax_019faf65-b8bf-72be-96cc-3a880f1b0521" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax_019faf65-b8bf-7ac5-b1a1-4683b696163d" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax_019faf65-b8bf-72be-96cc-3a880f1b0521" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.parknationalbank.com/role/ConsolidatedCondensedStatementsOfCashFlows" xlink:type="simple" xlink:href="prk-20260630.xsd#ConsolidatedCondensedStatementsOfCashFlows"/>
  <link:calculationLink xlink:role="http://www.parknationalbank.com/role/ConsolidatedCondensedStatementsOfCashFlows" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_019e6f15-1089-759f-b0a5-3da6385c2f53" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_019e6f15-1089-71d5-be55-e77f6d8d6060" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivities"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_019e6f15-1089-759f-b0a5-3da6385c2f53" xlink:to="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_019e6f15-1089-71d5-be55-e77f6d8d6060" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_019e6f15-1089-7527-8a14-444eb6b493e3" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivities"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_019e6f15-1089-759f-b0a5-3da6385c2f53" xlink:to="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_019e6f15-1089-7527-8a14-444eb6b493e3" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019e6f15-1089-7fce-8fcc-3375d113c3cb" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivities"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_019e6f15-1089-759f-b0a5-3da6385c2f53" xlink:to="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019e6f15-1089-7fce-8fcc-3375d113c3cb" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019e6f15-1089-7dca-8a64-226bf3449e03" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivities"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_019e6f15-1089-7c15-83ca-10efadb4871f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NetIncomeLoss"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019e6f15-1089-7dca-8a64-226bf3449e03" xlink:to="loc_us-gaap_NetIncomeLoss_019e6f15-1089-7c15-83ca-10efadb4871f" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProvisionForOtherCreditLosses_019e6f15-1089-70be-a3e4-d1e401f26972" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ProvisionForOtherCreditLosses"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019e6f15-1089-7dca-8a64-226bf3449e03" xlink:to="loc_us-gaap_ProvisionForOtherCreditLosses_019e6f15-1089-70be-a3e4-d1e401f26972" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AmortizationOfDeferredLoanOriginationFeesNet_019e6f15-1089-7da2-a9a7-d851ece86634" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AmortizationOfDeferredLoanOriginationFeesNet"/>
    <link:calculationArc order="3" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019e6f15-1089-7dca-8a64-226bf3449e03" xlink:to="loc_us-gaap_AmortizationOfDeferredLoanOriginationFeesNet_019e6f15-1089-7da2-a9a7-d851ece86634" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_prk_NetAmortizationOfPurchaseAccountingAdjustments_019e6f15-1089-7272-b378-a692139c633c" xlink:href="prk-20260630.xsd#prk_NetAmortizationOfPurchaseAccountingAdjustments"/>
    <link:calculationArc order="4" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019e6f15-1089-7dca-8a64-226bf3449e03" xlink:to="loc_prk_NetAmortizationOfPurchaseAccountingAdjustments_019e6f15-1089-7272-b378-a692139c633c" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Depreciation_019e6f15-1089-795b-b732-0d3f51439dc4" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_Depreciation"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019e6f15-1089-7dca-8a64-226bf3449e03" xlink:to="loc_us-gaap_Depreciation_019e6f15-1089-795b-b732-0d3f51439dc4" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccretionAmortizationOfDiscountsAndPremiumsInvestments_019e6f15-1089-7bc2-b300-7b1593902cb7" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AccretionAmortizationOfDiscountsAndPremiumsInvestments"/>
    <link:calculationArc order="6" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019e6f15-1089-7dca-8a64-226bf3449e03" xlink:to="loc_us-gaap_AccretionAmortizationOfDiscountsAndPremiumsInvestments_019e6f15-1089-7bc2-b300-7b1593902cb7" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GainLossOnSaleOfInvestments_019e6f15-1089-7d18-8711-911223116731" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_GainLossOnSaleOfInvestments"/>
    <link:calculationArc order="7" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019e6f15-1089-7dca-8a64-226bf3449e03" xlink:to="loc_us-gaap_GainLossOnSaleOfInvestments_019e6f15-1089-7d18-8711-911223116731" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromEquityMethodInvestments_019e6f15-1089-7796-a11e-a4510d633579" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncomeLossFromEquityMethodInvestments"/>
    <link:calculationArc order="8" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019e6f15-1089-7dca-8a64-226bf3449e03" xlink:to="loc_us-gaap_IncomeLossFromEquityMethodInvestments_019e6f15-1089-7796-a11e-a4510d633579" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_prk_PaymentsForLoanOriginationsLoansToBeSoldInSecondaryMarket_019e6f15-1089-7c8e-b3a7-d2529619b629" xlink:href="prk-20260630.xsd#prk_PaymentsForLoanOriginationsLoansToBeSoldInSecondaryMarket"/>
    <link:calculationArc order="9" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019e6f15-1089-7dca-8a64-226bf3449e03" xlink:to="loc_prk_PaymentsForLoanOriginationsLoansToBeSoldInSecondaryMarket_019e6f15-1089-7c8e-b3a7-d2529619b629" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_prk_ProceedsFromLoanSales_019e6f15-1089-788a-8022-2adfed23a81e" xlink:href="prk-20260630.xsd#prk_ProceedsFromLoanSales"/>
    <link:calculationArc order="10" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019e6f15-1089-7dca-8a64-226bf3449e03" xlink:to="loc_prk_ProceedsFromLoanSales_019e6f15-1089-788a-8022-2adfed23a81e" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GainLossOnSaleOfLoansAndLeases_019e6f15-1089-76a1-9e6d-5da6f007803b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_GainLossOnSaleOfLoansAndLeases"/>
    <link:calculationArc order="11" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019e6f15-1089-7dca-8a64-226bf3449e03" xlink:to="loc_us-gaap_GainLossOnSaleOfLoansAndLeases_019e6f15-1089-76a1-9e6d-5da6f007803b" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensation_019e6f15-1089-7ff1-8b2a-45a6c9076520" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensation"/>
    <link:calculationArc order="12" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019e6f15-1089-7dca-8a64-226bf3449e03" xlink:to="loc_us-gaap_ShareBasedCompensation_019e6f15-1089-7ff1-8b2a-45a6c9076520" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BankOwnedLifeInsuranceIncome_019e6f15-1089-7cb0-8fc2-30b5622cd146" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BankOwnedLifeInsuranceIncome"/>
    <link:calculationArc order="13" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019e6f15-1089-7dca-8a64-226bf3449e03" xlink:to="loc_us-gaap_BankOwnedLifeInsuranceIncome_019e6f15-1089-7cb0-8fc2-30b5622cd146" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AmortizationMethodQualifiedAffordableHousingProjectInvestmentsAmortization_019e6f15-1089-77a4-b1d0-3b2af25c86ff" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AmortizationMethodQualifiedAffordableHousingProjectInvestmentsAmortization"/>
    <link:calculationArc order="14" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019e6f15-1089-7dca-8a64-226bf3449e03" xlink:to="loc_us-gaap_AmortizationMethodQualifiedAffordableHousingProjectInvestmentsAmortization_019e6f15-1089-77a4-b1d0-3b2af25c86ff" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInPrepaidExpense_019e6f15-1089-758a-9755-bfbaed13ee5c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncreaseDecreaseInPrepaidExpense"/>
    <link:calculationArc order="15" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019e6f15-1089-7dca-8a64-226bf3449e03" xlink:to="loc_us-gaap_IncreaseDecreaseInPrepaidExpense_019e6f15-1089-758a-9755-bfbaed13ee5c" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInOtherOperatingAssets_019e6f15-1089-740a-837a-7fd0ac7af7fb" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncreaseDecreaseInOtherOperatingAssets"/>
    <link:calculationArc order="16" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019e6f15-1089-7dca-8a64-226bf3449e03" xlink:to="loc_us-gaap_IncreaseDecreaseInOtherOperatingAssets_019e6f15-1089-740a-837a-7fd0ac7af7fb" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInOtherOperatingLiabilities_019e6f15-1089-7ad2-86ac-3106aca78be3" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncreaseDecreaseInOtherOperatingLiabilities"/>
    <link:calculationArc order="17" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019e6f15-1089-7dca-8a64-226bf3449e03" xlink:to="loc_us-gaap_IncreaseDecreaseInOtherOperatingLiabilities_019e6f15-1089-7ad2-86ac-3106aca78be3" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_019e6f15-1089-791b-a8e8-21139da2a08b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivities"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromSaleOfFederalHomeLoanBankStock_019e6f15-1089-7398-819d-04321e069729" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ProceedsFromSaleOfFederalHomeLoanBankStock"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_019e6f15-1089-791b-a8e8-21139da2a08b" xlink:to="loc_us-gaap_ProceedsFromSaleOfFederalHomeLoanBankStock_019e6f15-1089-7398-819d-04321e069729" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromSaleOfFederalReserveStock_019e6f15-1089-7a2f-b140-63dc320be02b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ProceedsFromSaleOfFederalReserveStock"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_019e6f15-1089-791b-a8e8-21139da2a08b" xlink:to="loc_us-gaap_ProceedsFromSaleOfFederalReserveStock_019e6f15-1089-7a2f-b140-63dc320be02b" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromSaleOfAvailableForSaleSecuritiesDebt_019e6f15-1089-72dc-b70a-7db21d5f9d92" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ProceedsFromSaleOfAvailableForSaleSecuritiesDebt"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_019e6f15-1089-791b-a8e8-21139da2a08b" xlink:to="loc_us-gaap_ProceedsFromSaleOfAvailableForSaleSecuritiesDebt_019e6f15-1089-72dc-b70a-7db21d5f9d92" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromSaleOfEquitySecuritiesFvNi_019e6f15-1089-7aa6-a9b5-1e14b7fc3c9a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ProceedsFromSaleOfEquitySecuritiesFvNi"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_019e6f15-1089-791b-a8e8-21139da2a08b" xlink:to="loc_us-gaap_ProceedsFromSaleOfEquitySecuritiesFvNi_019e6f15-1089-7aa6-a9b5-1e14b7fc3c9a" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities_019e6f15-1089-7524-9980-7394c9bc53af" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_019e6f15-1089-791b-a8e8-21139da2a08b" xlink:to="loc_us-gaap_ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities_019e6f15-1089-7524-9980-7394c9bc53af" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsToAcquireAvailableForSaleSecuritiesDebt_019e6f15-1089-78aa-9bb8-480c0e7e4f42" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PaymentsToAcquireAvailableForSaleSecuritiesDebt"/>
    <link:calculationArc order="6" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_019e6f15-1089-791b-a8e8-21139da2a08b" xlink:to="loc_us-gaap_PaymentsToAcquireAvailableForSaleSecuritiesDebt_019e6f15-1089-78aa-9bb8-480c0e7e4f42" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsToAcquireMarketableSecurities_019e6f15-1089-7a38-883d-020accfacdc1" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PaymentsToAcquireMarketableSecurities"/>
    <link:calculationArc order="7" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_019e6f15-1089-791b-a8e8-21139da2a08b" xlink:to="loc_us-gaap_PaymentsToAcquireMarketableSecurities_019e6f15-1089-7a38-883d-020accfacdc1" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsToAcquireFederalHomeLoanBankStock_019e6f15-1089-7f39-bd05-827221943be2" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PaymentsToAcquireFederalHomeLoanBankStock"/>
    <link:calculationArc order="8" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_019e6f15-1089-791b-a8e8-21139da2a08b" xlink:to="loc_us-gaap_PaymentsToAcquireFederalHomeLoanBankStock_019e6f15-1089-7f39-bd05-827221943be2" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsToAcquireFederalReserveStock_019e6f15-1089-7e14-a119-6bd76a3e7778" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PaymentsToAcquireFederalReserveStock"/>
    <link:calculationArc order="9" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_019e6f15-1089-791b-a8e8-21139da2a08b" xlink:to="loc_us-gaap_PaymentsToAcquireFederalReserveStock_019e6f15-1089-7e14-a119-6bd76a3e7778" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsForProceedsFromInvestments_019e6f15-1089-750a-a534-44e6c400279b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PaymentsForProceedsFromInvestments"/>
    <link:calculationArc order="10" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_019e6f15-1089-791b-a8e8-21139da2a08b" xlink:to="loc_us-gaap_PaymentsForProceedsFromInvestments_019e6f15-1089-750a-a534-44e6c400279b" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsForProceedsFromLoansAndLeases_019e6f15-1089-71e7-a49d-ee2a309bae52" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PaymentsForProceedsFromLoansAndLeases"/>
    <link:calculationArc order="11" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_019e6f15-1089-791b-a8e8-21139da2a08b" xlink:to="loc_us-gaap_PaymentsForProceedsFromLoansAndLeases_019e6f15-1089-71e7-a49d-ee2a309bae52" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsForAffordableHousingPrograms_019e6f15-1089-7d3f-a91d-83255438af07" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PaymentsForAffordableHousingPrograms"/>
    <link:calculationArc order="12" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_019e6f15-1089-791b-a8e8-21139da2a08b" xlink:to="loc_us-gaap_PaymentsForAffordableHousingPrograms_019e6f15-1089-7d3f-a91d-83255438af07" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromSaleOfOtherRealEstate_019e6f15-1089-7a16-860e-eb2e4b52311c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ProceedsFromSaleOfOtherRealEstate"/>
    <link:calculationArc order="13" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_019e6f15-1089-791b-a8e8-21139da2a08b" xlink:to="loc_us-gaap_ProceedsFromSaleOfOtherRealEstate_019e6f15-1089-7a16-860e-eb2e4b52311c" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromLifeInsurancePolicies_019e6f15-1089-719f-9467-88972ed2f8a2" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ProceedsFromLifeInsurancePolicies"/>
    <link:calculationArc order="14" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_019e6f15-1089-791b-a8e8-21139da2a08b" xlink:to="loc_us-gaap_ProceedsFromLifeInsurancePolicies_019e6f15-1089-719f-9467-88972ed2f8a2" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsToAcquireLifeInsurancePolicies_019e6f15-1089-7cb2-b87d-2ac24363d40c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PaymentsToAcquireLifeInsurancePolicies"/>
    <link:calculationArc order="15" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_019e6f15-1089-791b-a8e8-21139da2a08b" xlink:to="loc_us-gaap_PaymentsToAcquireLifeInsurancePolicies_019e6f15-1089-7cb2-b87d-2ac24363d40c" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashAcquiredFromAcquisition_019e6f15-1089-7b89-83da-439d4787c94f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CashAcquiredFromAcquisition"/>
    <link:calculationArc order="16" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_019e6f15-1089-791b-a8e8-21139da2a08b" xlink:to="loc_us-gaap_CashAcquiredFromAcquisition_019e6f15-1089-7b89-83da-439d4787c94f" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_019e6f15-1089-7c07-918a-8094361cb051" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PaymentsToAcquirePropertyPlantAndEquipment"/>
    <link:calculationArc order="17" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_019e6f15-1089-791b-a8e8-21139da2a08b" xlink:to="loc_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_019e6f15-1089-7c07-918a-8094361cb051" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_019e6f15-1089-7d89-abec-a28eaafe9abd" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivities"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInDeposits_019e6f15-1089-7811-bb5c-40703317ad5b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncreaseDecreaseInDeposits"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_019e6f15-1089-7d89-abec-a28eaafe9abd" xlink:to="loc_us-gaap_IncreaseDecreaseInDeposits_019e6f15-1089-7811-bb5c-40703317ad5b" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_prk_NetIncreaseInOWSDeposits_019e6f15-1089-7275-b23e-42463d537017" xlink:href="prk-20260630.xsd#prk_NetIncreaseInOWSDeposits"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_019e6f15-1089-7d89-abec-a28eaafe9abd" xlink:to="loc_prk_NetIncreaseInOWSDeposits_019e6f15-1089-7275-b23e-42463d537017" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromRepaymentsOfShortTermDebt_019e6f15-1089-750f-b40b-af40a76a0ad5" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ProceedsFromRepaymentsOfShortTermDebt"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_019e6f15-1089-7d89-abec-a28eaafe9abd" xlink:to="loc_us-gaap_ProceedsFromRepaymentsOfShortTermDebt_019e6f15-1089-750f-b40b-af40a76a0ad5" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RepaymentsOfSubordinatedDebt_019e6f15-1089-7129-abb0-d8c308dce8fe" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RepaymentsOfSubordinatedDebt"/>
    <link:calculationArc order="4" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_019e6f15-1089-7d89-abec-a28eaafe9abd" xlink:to="loc_us-gaap_RepaymentsOfSubordinatedDebt_019e6f15-1089-7129-abb0-d8c308dce8fe" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsRelatedToTaxWithholdingForShareBasedCompensation_019e6f15-1089-701a-94a1-5b697b9ffd7b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PaymentsRelatedToTaxWithholdingForShareBasedCompensation"/>
    <link:calculationArc order="5" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_019e6f15-1089-7d89-abec-a28eaafe9abd" xlink:to="loc_us-gaap_PaymentsRelatedToTaxWithholdingForShareBasedCompensation_019e6f15-1089-701a-94a1-5b697b9ffd7b" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsOfOrdinaryDividends_019e6f15-1089-728a-9ae0-239c40af5751" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PaymentsOfOrdinaryDividends"/>
    <link:calculationArc order="6" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_019e6f15-1089-7d89-abec-a28eaafe9abd" xlink:to="loc_us-gaap_PaymentsOfOrdinaryDividends_019e6f15-1089-728a-9ae0-239c40af5751" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.parknationalbank.com/role/ConsolidatedCondensedBalanceSheetsParenthetical" xlink:type="simple" xlink:href="prk-20260630.xsd#ConsolidatedCondensedBalanceSheetsParenthetical"/>
  <link:calculationLink xlink:role="http://www.parknationalbank.com/role/ConsolidatedCondensedBalanceSheetsParenthetical" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_019e6f15-1088-7b3f-902d-8a46debf54b1" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_019e6f15-1088-7204-9e28-07df467face5" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StockholdersEquity"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_019e6f15-1088-7b3f-902d-8a46debf54b1" xlink:to="loc_us-gaap_StockholdersEquity_019e6f15-1088-7204-9e28-07df467face5" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MinorityInterest_019e6f15-1088-7ddb-885b-79e7b98da125" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_MinorityInterest"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_019e6f15-1088-7b3f-902d-8a46debf54b1" xlink:to="loc_us-gaap_MinorityInterest_019e6f15-1088-7ddb-885b-79e7b98da125" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_019e6f15-1088-75c7-ba32-804903d81c05" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StockholdersEquity"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PreferredStockValueOutstanding_019e6f15-1088-79c5-b2e1-adbecf6a30f6" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PreferredStockValueOutstanding"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquity_019e6f15-1088-75c7-ba32-804903d81c05" xlink:to="loc_us-gaap_PreferredStockValueOutstanding_019e6f15-1088-79c5-b2e1-adbecf6a30f6" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockValue_019e6f15-1088-7bce-ba93-1bc1f7059eee" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommonStockValue"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquity_019e6f15-1088-75c7-ba32-804903d81c05" xlink:to="loc_us-gaap_CommonStockValue_019e6f15-1088-7bce-ba93-1bc1f7059eee" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetainedEarningsAccumulatedDeficit_019e6f15-1088-71c1-ba0e-72b0fcc3329f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RetainedEarningsAccumulatedDeficit"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquity_019e6f15-1088-75c7-ba32-804903d81c05" xlink:to="loc_us-gaap_RetainedEarningsAccumulatedDeficit_019e6f15-1088-71c1-ba0e-72b0fcc3329f" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TreasuryStockValue_019e6f15-1088-77e9-9196-73d7ee7ca1f0" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_TreasuryStockValue"/>
    <link:calculationArc order="4" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquity_019e6f15-1088-75c7-ba32-804903d81c05" xlink:to="loc_us-gaap_TreasuryStockValue_019e6f15-1088-77e9-9196-73d7ee7ca1f0" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_019e6f15-1088-73eb-b4f5-574c6e2707af" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquity_019e6f15-1088-75c7-ba32-804903d81c05" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_019e6f15-1088-73eb-b4f5-574c6e2707af" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.parknationalbank.com/role/InvestmentSecuritiesScheduleOfInvestmentSecuritiesDetails" xlink:type="simple" xlink:href="prk-20260630.xsd#InvestmentSecuritiesScheduleOfInvestmentSecuritiesDetails"/>
  <link:calculationLink xlink:role="http://www.parknationalbank.com/role/InvestmentSecuritiesScheduleOfInvestmentSecuritiesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis_019e6f15-1089-7828-ae71-2ceb1a82164e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax_019e6f15-1089-79e6-906a-81cfb05772ba" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis_019e6f15-1089-7828-ae71-2ceb1a82164e" xlink:to="loc_us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax_019e6f15-1089-79e6-906a-81cfb05772ba" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtSecurities_019e6f15-1089-7008-90bc-eac8f3c8e929" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AvailableForSaleSecuritiesDebtSecurities"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis_019e6f15-1089-7828-ae71-2ceb1a82164e" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesDebtSecurities_019e6f15-1089-7008-90bc-eac8f3c8e929" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax_019e6f15-1089-7202-8bdc-33686a7a0e04" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax"/>
    <link:calculationArc order="3" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis_019e6f15-1089-7828-ae71-2ceb1a82164e" xlink:to="loc_us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax_019e6f15-1089-7202-8bdc-33686a7a0e04" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.parknationalbank.com/role/InvestmentSecuritiesScheduleOfUnrealizedLossOnSecuritiesDetails" xlink:type="simple" xlink:href="prk-20260630.xsd#InvestmentSecuritiesScheduleOfUnrealizedLossOnSecuritiesDetails"/>
  <link:calculationLink xlink:role="http://www.parknationalbank.com/role/InvestmentSecuritiesScheduleOfUnrealizedLossOnSecuritiesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPosition_019e6f15-1089-7a1a-9057-43f8fe143a04" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPosition"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months_019e6f15-1089-769d-aa5e-211d0720a904" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPosition_019e6f15-1089-7a1a-9057-43f8fe143a04" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months_019e6f15-1089-769d-aa5e-211d0720a904" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger_019e6f15-1089-7cbe-8eec-9941c7333dba" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPosition_019e6f15-1089-7a1a-9057-43f8fe143a04" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger_019e6f15-1089-7cbe-8eec-9941c7333dba" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss_019e6f15-1089-773d-94c0-52b131ab64ed" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss_019e6f15-1089-7f2e-9f6b-f846a584088f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss_019e6f15-1089-773d-94c0-52b131ab64ed" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss_019e6f15-1089-7f2e-9f6b-f846a584088f" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss_019e6f15-1089-7988-abc7-ea439658b5eb" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss_019e6f15-1089-773d-94c0-52b131ab64ed" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss_019e6f15-1089-7988-abc7-ea439658b5eb" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.parknationalbank.com/role/OtherInvestmentSecuritiesScheduleOfOtherInvestmentSecuritiesDetails" xlink:type="simple" xlink:href="prk-20260630.xsd#OtherInvestmentSecuritiesScheduleOfOtherInvestmentSecuritiesDetails"/>
  <link:calculationLink xlink:role="http://www.parknationalbank.com/role/OtherInvestmentSecuritiesScheduleOfOtherInvestmentSecuritiesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherInvestmentsAndSecuritiesAtCost_019e6f15-1089-7abb-ac36-c3cf883069b3" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherInvestmentsAndSecuritiesAtCost"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FederalHomeLoanBankStock_019e6f15-1089-7834-b7e5-55b69accc286" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FederalHomeLoanBankStock"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_OtherInvestmentsAndSecuritiesAtCost_019e6f15-1089-7abb-ac36-c3cf883069b3" xlink:to="loc_us-gaap_FederalHomeLoanBankStock_019e6f15-1089-7834-b7e5-55b69accc286" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FederalReserveBankStock_019e6f15-1089-7c5f-b238-3e6ac8eb412c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FederalReserveBankStock"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_OtherInvestmentsAndSecuritiesAtCost_019e6f15-1089-7abb-ac36-c3cf883069b3" xlink:to="loc_us-gaap_FederalReserveBankStock_019e6f15-1089-7c5f-b238-3e6ac8eb412c" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquitySecuritiesFvNi_019e6f15-1089-76d0-a5d6-2ef34dac74a6" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EquitySecuritiesFvNi"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_OtherInvestmentsAndSecuritiesAtCost_019e6f15-1089-7abb-ac36-c3cf883069b3" xlink:to="loc_us-gaap_EquitySecuritiesFvNi_019e6f15-1089-76d0-a5d6-2ef34dac74a6" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquitySecuritiesWithoutReadilyDeterminableFairValueAmount_019e6f15-1089-78bf-b661-038b650db681" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EquitySecuritiesWithoutReadilyDeterminableFairValueAmount"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_OtherInvestmentsAndSecuritiesAtCost_019e6f15-1089-7abb-ac36-c3cf883069b3" xlink:to="loc_us-gaap_EquitySecuritiesWithoutReadilyDeterminableFairValueAmount_019e6f15-1089-78bf-b661-038b650db681" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AlternativeInvestment_019e6f15-1089-71e4-b9dc-b24d67632868" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AlternativeInvestment"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_OtherInvestmentsAndSecuritiesAtCost_019e6f15-1089-7abb-ac36-c3cf883069b3" xlink:to="loc_us-gaap_AlternativeInvestment_019e6f15-1089-71e4-b9dc-b24d67632868" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.parknationalbank.com/role/LoansRecordedInvestmentInNonaccrualRestructuredAndLoansPastDue90DaysOrMoreAndAccruingDetails" xlink:type="simple" xlink:href="prk-20260630.xsd#LoansRecordedInvestmentInNonaccrualRestructuredAndLoansPastDue90DaysOrMoreAndAccruingDetails"/>
  <link:calculationLink xlink:role="http://www.parknationalbank.com/role/LoansRecordedInvestmentInNonaccrualRestructuredAndLoansPastDue90DaysOrMoreAndAccruingDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_prk_FinancingReceivableRecordedInvestmentNonperforming_019e6f15-1089-7b6f-aab4-f28540d9fd24" xlink:href="prk-20260630.xsd#prk_FinancingReceivableRecordedInvestmentNonperforming"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing_019e6f15-1089-7c7d-9dad-f66fdf07c01f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_prk_FinancingReceivableRecordedInvestmentNonperforming_019e6f15-1089-7b6f-aab4-f28540d9fd24" xlink:to="loc_us-gaap_FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing_019e6f15-1089-7c7d-9dad-f66fdf07c01f" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus_019e6f15-1089-7fcd-bd69-432e94011c60" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_prk_FinancingReceivableRecordedInvestmentNonperforming_019e6f15-1089-7b6f-aab4-f28540d9fd24" xlink:to="loc_us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus_019e6f15-1089-7fcd-bd69-432e94011c60" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.parknationalbank.com/role/AllowanceForCreditLossesActivityInTheAllowanceForLoanLossesDetails" xlink:type="simple" xlink:href="prk-20260630.xsd#AllowanceForCreditLossesActivityInTheAllowanceForLoanLossesDetails"/>
  <link:calculationLink xlink:role="http://www.parknationalbank.com/role/AllowanceForCreditLossesActivityInTheAllowanceForLoanLossesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableAllowanceForCreditLossWriteoffAfterRecovery_019e6f15-1089-73cb-8e96-8313b3913557" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FinancingReceivableAllowanceForCreditLossWriteoffAfterRecovery"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesRecovery_019e6f15-1089-7534-9eba-b6e4bcaed5d4" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FinancingReceivableAllowanceForCreditLossesRecovery"/>
    <link:calculationArc order="1" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_FinancingReceivableAllowanceForCreditLossWriteoffAfterRecovery_019e6f15-1089-73cb-8e96-8313b3913557" xlink:to="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesRecovery_019e6f15-1089-7534-9eba-b6e4bcaed5d4" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesWriteOffs_019e6f15-1089-7046-b90d-e2bac0bc05aa" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FinancingReceivableAllowanceForCreditLossesWriteOffs"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_FinancingReceivableAllowanceForCreditLossWriteoffAfterRecovery_019e6f15-1089-73cb-8e96-8313b3913557" xlink:to="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesWriteOffs_019e6f15-1089-7046-b90d-e2bac0bc05aa" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.parknationalbank.com/role/LeasesCostandOtherinformationDetails" xlink:type="simple" xlink:href="prk-20260630.xsd#LeasesCostandOtherinformationDetails"/>
  <link:calculationLink xlink:role="http://www.parknationalbank.com/role/LeasesCostandOtherinformationDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LeaseCost_019e6f15-115d-7569-8843-b66a4bdb25bc" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LeaseCost"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseCost_019e6f15-115d-7582-ba31-34c63db98d92" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OperatingLeaseCost"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_LeaseCost_019e6f15-115d-7569-8843-b66a4bdb25bc" xlink:to="loc_us-gaap_OperatingLeaseCost_019e6f15-115d-7582-ba31-34c63db98d92" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubleaseIncome_019e6f15-115d-71c1-a4a9-04bedcff7347" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SubleaseIncome"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_LeaseCost_019e6f15-115d-7569-8843-b66a4bdb25bc" xlink:to="loc_us-gaap_SubleaseIncome_019e6f15-115d-71c1-a4a9-04bedcff7347" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.parknationalbank.com/role/LeasesOperatingLeaseLiabilitiesPaymentsDueDetails" xlink:type="simple" xlink:href="prk-20260630.xsd#LeasesOperatingLeaseLiabilitiesPaymentsDueDetails"/>
  <link:calculationLink xlink:role="http://www.parknationalbank.com/role/LeasesOperatingLeaseLiabilitiesPaymentsDueDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_019e6f15-115d-7314-a1bb-fedb1f62666e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths_019e6f15-115d-7aff-9f0b-9e85c623f24d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_019e6f15-115d-7314-a1bb-fedb1f62666e" xlink:to="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths_019e6f15-115d-7aff-9f0b-9e85c623f24d" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearTwo_019e6f15-115d-7c51-b7a1-89ec769ef78d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearTwo"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_019e6f15-115d-7314-a1bb-fedb1f62666e" xlink:to="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearTwo_019e6f15-115d-7c51-b7a1-89ec769ef78d" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearThree_019e6f15-115d-7237-a572-8c503f6efd3b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearThree"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_019e6f15-115d-7314-a1bb-fedb1f62666e" xlink:to="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearThree_019e6f15-115d-7237-a572-8c503f6efd3b" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFour_019e6f15-115d-7231-8771-5f127ffe2124" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFour"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_019e6f15-115d-7314-a1bb-fedb1f62666e" xlink:to="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFour_019e6f15-115d-7231-8771-5f127ffe2124" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFive_019e6f15-115d-7ae6-adac-75a138e3d3c6" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFive"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_019e6f15-115d-7314-a1bb-fedb1f62666e" xlink:to="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFive_019e6f15-115d-7ae6-adac-75a138e3d3c6" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive_019e6f15-115d-7497-bba1-57b1bc8620a2" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive"/>
    <link:calculationArc order="6" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_019e6f15-115d-7314-a1bb-fedb1f62666e" xlink:to="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive_019e6f15-115d-7497-bba1-57b1bc8620a2" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.parknationalbank.com/role/OtherComprehensiveIncomeLossComponentOfAccumulatedOtherComprehensiveIncomeLossDetails" xlink:type="simple" xlink:href="prk-20260630.xsd#OtherComprehensiveIncomeLossComponentOfAccumulatedOtherComprehensiveIncomeLossDetails"/>
  <link:calculationLink xlink:role="http://www.parknationalbank.com/role/OtherComprehensiveIncomeLossComponentOfAccumulatedOtherComprehensiveIncomeLossDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_019e6f15-115d-76bc-b999-c980e78e33ad" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTax"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax_019e6f15-115d-7c5d-ad94-cf5edf87c1ff" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_019e6f15-115d-76bc-b999-c980e78e33ad" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax_019e6f15-115d-7c5d-ad94-cf5edf87c1ff" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax_019e6f15-115d-7412-9bd6-a7aaf403e110" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_019e6f15-115d-76bc-b999-c980e78e33ad" xlink:to="loc_us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax_019e6f15-115d-7412-9bd6-a7aaf403e110" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax_019e6f15-115d-7837-9e49-e3b676975222" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeReclassificationAdjustmentsNetOfTax_019e6f15-115d-792f-a1d5-b3b2743ce726" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeReclassificationAdjustmentsNetOfTax"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax_019e6f15-115d-7837-9e49-e3b676975222" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeReclassificationAdjustmentsNetOfTax_019e6f15-115d-792f-a1d5-b3b2743ce726" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.parknationalbank.com/role/EarningsPerCommonShareSummaryOfComputationOfBasicAndDilutedEarningsPerCommonShareDetails" xlink:type="simple" xlink:href="prk-20260630.xsd#EarningsPerCommonShareSummaryOfComputationOfBasicAndDilutedEarningsPerCommonShareDetails"/>
  <link:calculationLink xlink:role="http://www.parknationalbank.com/role/EarningsPerCommonShareSummaryOfComputationOfBasicAndDilutedEarningsPerCommonShareDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_019e6f15-115d-72c9-8cb4-d1c2dcb546a2" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_019e6f15-115d-7327-8eee-20efefcc3fbb" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_WeightedAverageNumberOfSharesOutstandingBasic"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_019e6f15-115d-72c9-8cb4-d1c2dcb546a2" xlink:to="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_019e6f15-115d-7327-8eee-20efefcc3fbb" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustment_019e6f15-115d-7e5c-becc-8c856ab720e8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustment"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_019e6f15-115d-72c9-8cb4-d1c2dcb546a2" xlink:to="loc_us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustment_019e6f15-115d-7e5c-becc-8c856ab720e8" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.parknationalbank.com/role/BenefitPlanComponentsOfNetPeriodicBenefitExpenseDetails" xlink:type="simple" xlink:href="prk-20260630.xsd#BenefitPlanComponentsOfNetPeriodicBenefitExpenseDetails"/>
  <link:calculationLink xlink:role="http://www.parknationalbank.com/role/BenefitPlanComponentsOfNetPeriodicBenefitExpenseDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost_019e6f15-115d-7a29-a5ab-0956d9dd19ea" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanServiceCost_019e6f15-115d-7f77-b34a-c62e959efe56" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DefinedBenefitPlanServiceCost"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost_019e6f15-115d-7a29-a5ab-0956d9dd19ea" xlink:to="loc_us-gaap_DefinedBenefitPlanServiceCost_019e6f15-115d-7f77-b34a-c62e959efe56" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanInterestCost_019e6f15-115d-7ed5-a44e-9be089d0ccad" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DefinedBenefitPlanInterestCost"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost_019e6f15-115d-7a29-a5ab-0956d9dd19ea" xlink:to="loc_us-gaap_DefinedBenefitPlanInterestCost_019e6f15-115d-7ed5-a44e-9be089d0ccad" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanExpectedReturnOnPlanAssets_019e6f15-115d-71ea-9215-fcc40951ab8b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DefinedBenefitPlanExpectedReturnOnPlanAssets"/>
    <link:calculationArc order="3" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost_019e6f15-115d-7a29-a5ab-0956d9dd19ea" xlink:to="loc_us-gaap_DefinedBenefitPlanExpectedReturnOnPlanAssets_019e6f15-115d-71ea-9215-fcc40951ab8b" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanActuarialGainLoss_019e6f15-115d-7722-988e-72d2c5335d10" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DefinedBenefitPlanActuarialGainLoss"/>
    <link:calculationArc order="4" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost_019e6f15-115d-7a29-a5ab-0956d9dd19ea" xlink:to="loc_us-gaap_DefinedBenefitPlanActuarialGainLoss_019e6f15-115d-7722-988e-72d2c5335d10" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.parknationalbank.com/role/FairValueFairValueOfFinancialInstrumentsDetails" xlink:type="simple" xlink:href="prk-20260630.xsd#FairValueFairValueOfFinancialInstrumentsDetails"/>
  <link:calculationLink xlink:role="http://www.parknationalbank.com/role/FairValueFairValueOfFinancialInstrumentsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DepositsFairValueDisclosure_019e6f15-115d-71bc-848a-0cb3d1ee09cf" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DepositsFairValueDisclosure"/>
    <link:loc xlink:type="locator" xlink:label="loc_prk_BrokeredAndBidDepositsFairValue_019e6f15-115d-7d58-911c-98f661f6ec25" xlink:href="prk-20260630.xsd#prk_BrokeredAndBidDepositsFairValue"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_DepositsFairValueDisclosure_019e6f15-115d-71bc-848a-0cb3d1ee09cf" xlink:to="loc_prk_BrokeredAndBidDepositsFairValue_019e6f15-115d-7d58-911c-98f661f6ec25" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherLiabilitiesFairValueDisclosure_019e6f15-115d-7f5b-8038-487998c1d2d1" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherLiabilitiesFairValueDisclosure"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_DepositsFairValueDisclosure_019e6f15-115d-71bc-848a-0cb3d1ee09cf" xlink:to="loc_us-gaap_OtherLiabilitiesFairValueDisclosure_019e6f15-115d-7f5b-8038-487998c1d2d1" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_prk_TimeDepositsFairValue_019e6f15-115d-70c6-ab4d-f1624f0ac454" xlink:href="prk-20260630.xsd#prk_TimeDepositsFairValue"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_DepositsFairValueDisclosure_019e6f15-115d-71bc-848a-0cb3d1ee09cf" xlink:to="loc_prk_TimeDepositsFairValue_019e6f15-115d-70c6-ab4d-f1624f0ac454" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LoansReceivableFairValueDisclosure_019e6f15-115d-7285-a128-d89f06a875d3" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LoansReceivableFairValueDisclosure"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeAssets_019e6f15-115d-7a62-a5c4-05e05a467be4" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeAssets"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_LoansReceivableFairValueDisclosure_019e6f15-115d-7285-a128-d89f06a875d3" xlink:to="loc_us-gaap_DerivativeAssets_019e6f15-115d-7a62-a5c4-05e05a467be4" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_prk_ImpairedLoanFairValue_019e6f15-115d-762d-84e4-4312c222b497" xlink:href="prk-20260630.xsd#prk_ImpairedLoanFairValue"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_LoansReceivableFairValueDisclosure_019e6f15-115d-7285-a128-d89f06a875d3" xlink:to="loc_prk_ImpairedLoanFairValue_019e6f15-115d-762d-84e4-4312c222b497" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherAssetsFairValueDisclosure_019e6f15-115d-73ee-8985-692e2795e0b6" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherAssetsFairValueDisclosure"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_LoansReceivableFairValueDisclosure_019e6f15-115d-7285-a128-d89f06a875d3" xlink:to="loc_us-gaap_OtherAssetsFairValueDisclosure_019e6f15-115d-73ee-8985-692e2795e0b6" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LoansHeldForSaleFairValueDisclosure_019e6f15-115d-789c-94c3-b09f8e117ead" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LoansHeldForSaleFairValueDisclosure"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_LoansReceivableFairValueDisclosure_019e6f15-115d-7285-a128-d89f06a875d3" xlink:to="loc_us-gaap_LoansHeldForSaleFairValueDisclosure_019e6f15-115d-789c-94c3-b09f8e117ead" xlink:type="arc"/>
  </link:calculationLink>
</link:linkbase>
