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

<!--XBRL Document Created with the Workiva Platform-->
<!--Copyright 2026 Workiva-->
<!--r:019cf814-e85c-744b-8daf-ef0cfdce72b1,g:6c29a63d-8d26-4d2b-8021-eba71bc13440-->
<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:roleRef roleURI="http://www.acnb.com/role/Cover" xlink:type="simple" xlink:href="acnb-20260313.xsd#Cover"/>
  <link:presentationLink xlink:role="http://www.acnb.com/role/Cover" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_dei_CoverAbstract_019cf814-e85c-7ca8-b099-09c8fe9dd4ff" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_CoverAbstract"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentType_019cf814-e85c-7e31-a2db-c1e341b5c939" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentType"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019cf814-e85c-7ca8-b099-09c8fe9dd4ff" xlink:to="loc_dei_DocumentType_019cf814-e85c-7e31-a2db-c1e341b5c939" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentPeriodEndDate_019cf814-e85c-7a0d-8c63-4798481346d9" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentPeriodEndDate"/>
    <link:presentationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019cf814-e85c-7ca8-b099-09c8fe9dd4ff" xlink:to="loc_dei_DocumentPeriodEndDate_019cf814-e85c-7a0d-8c63-4798481346d9" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityRegistrantName_019cf814-e85c-7876-8ab4-7c9c57d248d0" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityRegistrantName"/>
    <link:presentationArc order="3" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019cf814-e85c-7ca8-b099-09c8fe9dd4ff" xlink:to="loc_dei_EntityRegistrantName_019cf814-e85c-7876-8ab4-7c9c57d248d0" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityIncorporationStateCountryCode_019cf814-e85c-7d87-bd3f-c06a99ef3767" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityIncorporationStateCountryCode"/>
    <link:presentationArc order="4" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019cf814-e85c-7ca8-b099-09c8fe9dd4ff" xlink:to="loc_dei_EntityIncorporationStateCountryCode_019cf814-e85c-7d87-bd3f-c06a99ef3767" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityFileNumber_019cf814-e85c-77ee-a2b8-03b941598620" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityFileNumber"/>
    <link:presentationArc order="5" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019cf814-e85c-7ca8-b099-09c8fe9dd4ff" xlink:to="loc_dei_EntityFileNumber_019cf814-e85c-77ee-a2b8-03b941598620" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityTaxIdentificationNumber_019cf814-e85c-7597-993d-bfd0ae52dfed" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityTaxIdentificationNumber"/>
    <link:presentationArc order="6" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019cf814-e85c-7ca8-b099-09c8fe9dd4ff" xlink:to="loc_dei_EntityTaxIdentificationNumber_019cf814-e85c-7597-993d-bfd0ae52dfed" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressAddressLine1_019cf814-e85c-7c6f-b7c6-fdc849a9609d" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityAddressAddressLine1"/>
    <link:presentationArc order="7" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019cf814-e85c-7ca8-b099-09c8fe9dd4ff" xlink:to="loc_dei_EntityAddressAddressLine1_019cf814-e85c-7c6f-b7c6-fdc849a9609d" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressCityOrTown_019cf814-e85c-7ab0-8643-ae40bd46a568" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityAddressCityOrTown"/>
    <link:presentationArc order="8" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019cf814-e85c-7ca8-b099-09c8fe9dd4ff" xlink:to="loc_dei_EntityAddressCityOrTown_019cf814-e85c-7ab0-8643-ae40bd46a568" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressStateOrProvince_019cf814-e85c-749b-b38c-84cdc4703775" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityAddressStateOrProvince"/>
    <link:presentationArc order="9" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019cf814-e85c-7ca8-b099-09c8fe9dd4ff" xlink:to="loc_dei_EntityAddressStateOrProvince_019cf814-e85c-749b-b38c-84cdc4703775" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressPostalZipCode_019cf814-e85c-7759-88b7-1bdeb83047b2" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityAddressPostalZipCode"/>
    <link:presentationArc order="10" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019cf814-e85c-7ca8-b099-09c8fe9dd4ff" xlink:to="loc_dei_EntityAddressPostalZipCode_019cf814-e85c-7759-88b7-1bdeb83047b2" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_CityAreaCode_019cf814-e85c-7740-8d11-af77dbe09f6d" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_CityAreaCode"/>
    <link:presentationArc order="11" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019cf814-e85c-7ca8-b099-09c8fe9dd4ff" xlink:to="loc_dei_CityAreaCode_019cf814-e85c-7740-8d11-af77dbe09f6d" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LocalPhoneNumber_019cf814-e85c-7d93-9097-b7c9aff622d4" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LocalPhoneNumber"/>
    <link:presentationArc order="12" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019cf814-e85c-7ca8-b099-09c8fe9dd4ff" xlink:to="loc_dei_LocalPhoneNumber_019cf814-e85c-7d93-9097-b7c9aff622d4" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_WrittenCommunications_019cf814-e85c-70d3-aa21-2b51409951a0" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_WrittenCommunications"/>
    <link:presentationArc order="13" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019cf814-e85c-7ca8-b099-09c8fe9dd4ff" xlink:to="loc_dei_WrittenCommunications_019cf814-e85c-70d3-aa21-2b51409951a0" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_SolicitingMaterial_019cf814-e85c-7774-9fd4-1f0b0f8ef2ed" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_SolicitingMaterial"/>
    <link:presentationArc order="14" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019cf814-e85c-7ca8-b099-09c8fe9dd4ff" xlink:to="loc_dei_SolicitingMaterial_019cf814-e85c-7774-9fd4-1f0b0f8ef2ed" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_PreCommencementTenderOffer_019cf814-e85c-7b0a-9105-2f2e3e88a463" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_PreCommencementTenderOffer"/>
    <link:presentationArc order="15" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019cf814-e85c-7ca8-b099-09c8fe9dd4ff" xlink:to="loc_dei_PreCommencementTenderOffer_019cf814-e85c-7b0a-9105-2f2e3e88a463" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_PreCommencementIssuerTenderOffer_019cf814-e85c-7f31-8f78-f53eddbb47d9" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_PreCommencementIssuerTenderOffer"/>
    <link:presentationArc order="16" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019cf814-e85c-7ca8-b099-09c8fe9dd4ff" xlink:to="loc_dei_PreCommencementIssuerTenderOffer_019cf814-e85c-7f31-8f78-f53eddbb47d9" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityEmergingGrowthCompany_019cf814-e85c-79fc-8c3c-75acddd6349f" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityEmergingGrowthCompany"/>
    <link:presentationArc order="17" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019cf814-e85c-7ca8-b099-09c8fe9dd4ff" xlink:to="loc_dei_EntityEmergingGrowthCompany_019cf814-e85c-79fc-8c3c-75acddd6349f" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_Security12bTitle_019cf814-e85c-7e09-bfcf-39980e74dc40" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_Security12bTitle"/>
    <link:presentationArc order="18" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019cf814-e85c-7ca8-b099-09c8fe9dd4ff" xlink:to="loc_dei_Security12bTitle_019cf814-e85c-7e09-bfcf-39980e74dc40" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_TradingSymbol_019cf814-e85c-7bd4-bd09-0adbbfe4e64b" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_TradingSymbol"/>
    <link:presentationArc order="19" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019cf814-e85c-7ca8-b099-09c8fe9dd4ff" xlink:to="loc_dei_TradingSymbol_019cf814-e85c-7bd4-bd09-0adbbfe4e64b" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_SecurityExchangeName_019cf814-e85c-7798-bb05-1c2ce2ba5a07" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_SecurityExchangeName"/>
    <link:presentationArc order="20" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019cf814-e85c-7ca8-b099-09c8fe9dd4ff" xlink:to="loc_dei_SecurityExchangeName_019cf814-e85c-7798-bb05-1c2ce2ba5a07" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_AmendmentFlag_019cf814-e85c-7048-a3fa-cda12fe260b2" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_AmendmentFlag"/>
    <link:presentationArc order="21" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019cf814-e85c-7ca8-b099-09c8fe9dd4ff" xlink:to="loc_dei_AmendmentFlag_019cf814-e85c-7048-a3fa-cda12fe260b2" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityCentralIndexKey_019cf814-e85c-73c5-b3c4-e190b463574f" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityCentralIndexKey"/>
    <link:presentationArc order="22" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019cf814-e85c-7ca8-b099-09c8fe9dd4ff" xlink:to="loc_dei_EntityCentralIndexKey_019cf814-e85c-73c5-b3c4-e190b463574f" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
  </link:presentationLink>
</link:linkbase>
