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

<!--XBRL Document Created with the Workiva Platform-->
<!--Copyright 2026 Workiva-->
<!--r:019ef4d4-8d13-7ffb-84d5-aad30f7d9f81,g:d9317f11-a646-4501-bdd0-779ad47af1b0-->
<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.fcbanking.com/role/DocumentandEntityInformationDocumentandEntityInformation" xlink:type="simple" xlink:href="fcf-20260728.xsd#DocumentandEntityInformationDocumentandEntityInformation"/>
  <link:presentationLink xlink:role="http://www.fcbanking.com/role/DocumentandEntityInformationDocumentandEntityInformation" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_fcf_DocumentandEntityInformationAbstract_019ef4d4-8d13-7598-a929-df22ef2bc77f" xlink:href="fcf-20260728.xsd#fcf_DocumentandEntityInformationAbstract"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentInformationTable_019ef4d4-8d13-7dcb-a500-b73239a8ace2" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationTable"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_fcf_DocumentandEntityInformationAbstract_019ef4d4-8d13-7598-a929-df22ef2bc77f" xlink:to="loc_dei_DocumentInformationTable_019ef4d4-8d13-7dcb-a500-b73239a8ace2" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentInformationDocumentAxis_019ef4d4-8d13-7eb8-9711-bb48b10ef8c9" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationDocumentAxis"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_DocumentInformationTable_019ef4d4-8d13-7dcb-a500-b73239a8ace2" xlink:to="loc_dei_DocumentInformationDocumentAxis_019ef4d4-8d13-7eb8-9711-bb48b10ef8c9" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentDomain_019ef4d4-8d13-7bc2-9167-dad97652ec0b" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentDomain"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_DocumentInformationDocumentAxis_019ef4d4-8d13-7eb8-9711-bb48b10ef8c9" xlink:to="loc_dei_DocumentDomain_019ef4d4-8d13-7bc2-9167-dad97652ec0b" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentInformationLineItems_019ef4d4-8d13-787d-91a9-c35658949123" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationLineItems"/>
    <link:presentationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_DocumentInformationTable_019ef4d4-8d13-7dcb-a500-b73239a8ace2" xlink:to="loc_dei_DocumentInformationLineItems_019ef4d4-8d13-787d-91a9-c35658949123" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityIncorporationStateCountryCode_019ef4d4-8d13-7b66-a69a-a0bd97bf81ce" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityIncorporationStateCountryCode"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_DocumentInformationLineItems_019ef4d4-8d13-787d-91a9-c35658949123" xlink:to="loc_dei_EntityIncorporationStateCountryCode_019ef4d4-8d13-7b66-a69a-a0bd97bf81ce" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_AmendmentFlag_019ef4d4-8d13-750d-8580-eaaa23144834" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_AmendmentFlag"/>
    <link:presentationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_DocumentInformationLineItems_019ef4d4-8d13-787d-91a9-c35658949123" xlink:to="loc_dei_AmendmentFlag_019ef4d4-8d13-750d-8580-eaaa23144834" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityRegistrantName_019ef4d4-8d13-7fe2-9927-a1835463b5df" 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_DocumentInformationLineItems_019ef4d4-8d13-787d-91a9-c35658949123" xlink:to="loc_dei_EntityRegistrantName_019ef4d4-8d13-7fe2-9927-a1835463b5df" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentFiscalYearFocus_019ef4d4-8d13-7613-b92b-ac295d787781" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentFiscalYearFocus"/>
    <link:presentationArc order="4" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_DocumentInformationLineItems_019ef4d4-8d13-787d-91a9-c35658949123" xlink:to="loc_dei_DocumentFiscalYearFocus_019ef4d4-8d13-7613-b92b-ac295d787781" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressStateOrProvince_019ef4d4-8d13-7043-8ae8-a3cfad4c1d71" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityAddressStateOrProvince"/>
    <link:presentationArc order="5" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_DocumentInformationLineItems_019ef4d4-8d13-787d-91a9-c35658949123" xlink:to="loc_dei_EntityAddressStateOrProvince_019ef4d4-8d13-7043-8ae8-a3cfad4c1d71" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityFileNumber_019ef4d4-8d13-7c63-b802-898ff961e774" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityFileNumber"/>
    <link:presentationArc order="6" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_DocumentInformationLineItems_019ef4d4-8d13-787d-91a9-c35658949123" xlink:to="loc_dei_EntityFileNumber_019ef4d4-8d13-7c63-b802-898ff961e774" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityTaxIdentificationNumber_019ef4d4-8d13-7858-b5d5-25e60032ef6a" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityTaxIdentificationNumber"/>
    <link:presentationArc order="7" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_DocumentInformationLineItems_019ef4d4-8d13-787d-91a9-c35658949123" xlink:to="loc_dei_EntityTaxIdentificationNumber_019ef4d4-8d13-7858-b5d5-25e60032ef6a" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentType_019ef4d4-8d13-7127-b029-666ec6ce460e" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentType"/>
    <link:presentationArc order="8" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_DocumentInformationLineItems_019ef4d4-8d13-787d-91a9-c35658949123" xlink:to="loc_dei_DocumentType_019ef4d4-8d13-7127-b029-666ec6ce460e" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressAddressLine1_019ef4d4-8d13-7428-ae7c-da8e7b2a45f7" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityAddressAddressLine1"/>
    <link:presentationArc order="9" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_DocumentInformationLineItems_019ef4d4-8d13-787d-91a9-c35658949123" xlink:to="loc_dei_EntityAddressAddressLine1_019ef4d4-8d13-7428-ae7c-da8e7b2a45f7" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressCityOrTown_019ef4d4-8d13-7b82-a3a4-286b76c9e3d4" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityAddressCityOrTown"/>
    <link:presentationArc order="10" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_DocumentInformationLineItems_019ef4d4-8d13-787d-91a9-c35658949123" xlink:to="loc_dei_EntityAddressCityOrTown_019ef4d4-8d13-7b82-a3a4-286b76c9e3d4" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressPostalZipCode_019ef4d4-8d13-72e3-bc68-51f51284706d" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityAddressPostalZipCode"/>
    <link:presentationArc order="11" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_DocumentInformationLineItems_019ef4d4-8d13-787d-91a9-c35658949123" xlink:to="loc_dei_EntityAddressPostalZipCode_019ef4d4-8d13-72e3-bc68-51f51284706d" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentPeriodEndDate_019ef4d4-8d13-7cb1-9d1c-e56d980d62f1" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentPeriodEndDate"/>
    <link:presentationArc order="12" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_DocumentInformationLineItems_019ef4d4-8d13-787d-91a9-c35658949123" xlink:to="loc_dei_DocumentPeriodEndDate_019ef4d4-8d13-7cb1-9d1c-e56d980d62f1" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_CityAreaCode_019ef4d4-8d13-71cc-b0d5-78060e682072" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_CityAreaCode"/>
    <link:presentationArc order="13" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_DocumentInformationLineItems_019ef4d4-8d13-787d-91a9-c35658949123" xlink:to="loc_dei_CityAreaCode_019ef4d4-8d13-71cc-b0d5-78060e682072" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LocalPhoneNumber_019ef4d4-8d13-7d4d-94d9-f090d33786ad" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LocalPhoneNumber"/>
    <link:presentationArc order="14" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_DocumentInformationLineItems_019ef4d4-8d13-787d-91a9-c35658949123" xlink:to="loc_dei_LocalPhoneNumber_019ef4d4-8d13-7d4d-94d9-f090d33786ad" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_WrittenCommunications_019ef4d4-8d13-721a-a906-c61cc2161bfd" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_WrittenCommunications"/>
    <link:presentationArc order="15" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_DocumentInformationLineItems_019ef4d4-8d13-787d-91a9-c35658949123" xlink:to="loc_dei_WrittenCommunications_019ef4d4-8d13-721a-a906-c61cc2161bfd" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_SolicitingMaterial_019ef4d4-8d13-7c07-8730-e2ff9e5ea291" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_SolicitingMaterial"/>
    <link:presentationArc order="16" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_DocumentInformationLineItems_019ef4d4-8d13-787d-91a9-c35658949123" xlink:to="loc_dei_SolicitingMaterial_019ef4d4-8d13-7c07-8730-e2ff9e5ea291" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_PreCommencementTenderOffer_019ef4d4-8d13-7e53-a485-96a50fd25d70" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_PreCommencementTenderOffer"/>
    <link:presentationArc order="17" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_DocumentInformationLineItems_019ef4d4-8d13-787d-91a9-c35658949123" xlink:to="loc_dei_PreCommencementTenderOffer_019ef4d4-8d13-7e53-a485-96a50fd25d70" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_PreCommencementIssuerTenderOffer_019ef4d4-8d13-73ff-9afb-61a0a61a0ff0" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_PreCommencementIssuerTenderOffer"/>
    <link:presentationArc order="18" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_DocumentInformationLineItems_019ef4d4-8d13-787d-91a9-c35658949123" xlink:to="loc_dei_PreCommencementIssuerTenderOffer_019ef4d4-8d13-73ff-9afb-61a0a61a0ff0" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityEmergingGrowthCompany_019ef4d4-8d13-76a3-81bb-1ba69285cab1" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityEmergingGrowthCompany"/>
    <link:presentationArc order="19" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_DocumentInformationLineItems_019ef4d4-8d13-787d-91a9-c35658949123" xlink:to="loc_dei_EntityEmergingGrowthCompany_019ef4d4-8d13-76a3-81bb-1ba69285cab1" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentFiscalPeriodFocus_019ef4d4-8d13-7935-934d-37fb62c069c1" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentFiscalPeriodFocus"/>
    <link:presentationArc order="20" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_DocumentInformationLineItems_019ef4d4-8d13-787d-91a9-c35658949123" xlink:to="loc_dei_DocumentFiscalPeriodFocus_019ef4d4-8d13-7935-934d-37fb62c069c1" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityCentralIndexKey_019ef4d4-8d13-7a80-8c23-581675687f10" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityCentralIndexKey"/>
    <link:presentationArc order="21" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_DocumentInformationLineItems_019ef4d4-8d13-787d-91a9-c35658949123" xlink:to="loc_dei_EntityCentralIndexKey_019ef4d4-8d13-7a80-8c23-581675687f10" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_Security12bTitle_019ef4d4-8d13-7f6f-8eca-da8a113921ac" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_Security12bTitle"/>
    <link:presentationArc order="22" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_DocumentInformationLineItems_019ef4d4-8d13-787d-91a9-c35658949123" xlink:to="loc_dei_Security12bTitle_019ef4d4-8d13-7f6f-8eca-da8a113921ac" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_TradingSymbol_019ef4d4-8d13-7170-ab52-66f1da780dad" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_TradingSymbol"/>
    <link:presentationArc order="23" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_DocumentInformationLineItems_019ef4d4-8d13-787d-91a9-c35658949123" xlink:to="loc_dei_TradingSymbol_019ef4d4-8d13-7170-ab52-66f1da780dad" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_SecurityExchangeName_019ef4d4-8d13-7d24-940c-08705ca74f8f" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_SecurityExchangeName"/>
    <link:presentationArc order="24" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_DocumentInformationLineItems_019ef4d4-8d13-787d-91a9-c35658949123" xlink:to="loc_dei_SecurityExchangeName_019ef4d4-8d13-7d24-940c-08705ca74f8f" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
  </link:presentationLink>
</link:linkbase>
