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<!-- DFIN ActiveDisclosure(SM) XBRL Linkbase Document - http://www.dfinsolutions.com/ -->
<!-- Creation Date      : 2021-03-04T18:54:47.8266812+00:00 -->
<!-- Version            : 5.0.1.571 -->
<!-- Package ID         : 6567c4eb04714580a63649b814e159e5 -->
<!-- Copyright (c) 2021 Donnelley Financial Solutions, Inc. All Rights Reserved. -->
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    <link:label xml:lang="en-US" xlink:label="dei_EntityCentralIndexKey_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Central Index Key</link:label>
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    <link:loc xlink:href="fmnb-20201231.xsd#fmnb_FinancingReceivableAllowanceForCreditLossAcquiredLoansCollectivelyEvaluatedForImpairment" xlink:type="locator" xlink:label="fmnb_FinancingReceivableAllowanceForCreditLossAcquiredLoansCollectivelyEvaluatedForImpairment" />
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    <link:loc xlink:href="fmnb-20201231.xsd#fmnb_IncomeTaxReconciliationBankOwnedLifeInsuranceIncome" xlink:type="locator" xlink:label="fmnb_IncomeTaxReconciliationBankOwnedLifeInsuranceIncome" />
    <link:label xml:lang="en-US" xlink:label="fmnb_IncomeTaxReconciliationBankOwnedLifeInsuranceIncome_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Income tax reconciliation bank owned life insurance income.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="fmnb_IncomeTaxReconciliationBankOwnedLifeInsuranceIncome" xlink:to="fmnb_IncomeTaxReconciliationBankOwnedLifeInsuranceIncome_lbl" />
    <link:loc xlink:href="fmnb-20201231.xsd#fmnb_IncomeTaxReconciliationEffectOfNontaxableInsurancePremiums" xlink:type="locator" xlink:label="fmnb_IncomeTaxReconciliationEffectOfNontaxableInsurancePremiums" />
    <link:label xml:lang="en-US" xlink:label="fmnb_IncomeTaxReconciliationEffectOfNontaxableInsurancePremiums_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Income tax reconciliation effect of nontaxable insurance premiums.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="fmnb_IncomeTaxReconciliationEffectOfNontaxableInsurancePremiums" xlink:to="fmnb_IncomeTaxReconciliationEffectOfNontaxableInsurancePremiums_lbl" />
    <link:loc xlink:href="fmnb-20201231.xsd#fmnb_DeferredTaxAssetsTaxDeferredExpenseDeferredLoanFees" xlink:type="locator" xlink:label="fmnb_DeferredTaxAssetsTaxDeferredExpenseDeferredLoanFees" />
    <link:label xml:lang="en-US" xlink:label="fmnb_DeferredTaxAssetsTaxDeferredExpenseDeferredLoanFees_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Deferred tax assets tax deferred expense deferred loan fees.</link:label>
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    <link:loc xlink:href="fmnb-20201231.xsd#fmnb_DeferredTaxAssetsNonaccrualLoanInterestIncome" xlink:type="locator" xlink:label="fmnb_DeferredTaxAssetsNonaccrualLoanInterestIncome" />
    <link:label xml:lang="en-US" xlink:label="fmnb_DeferredTaxAssetsNonaccrualLoanInterestIncome_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Deferred tax assets nonaccrual loan interest income.</link:label>
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    <link:loc xlink:href="fmnb-20201231.xsd#fmnb_DeferredTaxAssetsOtherThanTemporaryImpairment" xlink:type="locator" xlink:label="fmnb_DeferredTaxAssetsOtherThanTemporaryImpairment" />
    <link:label xml:lang="en-US" xlink:label="fmnb_DeferredTaxAssetsOtherThanTemporaryImpairment_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Deferred tax assets other than temporary impairment.</link:label>
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    <link:loc xlink:href="fmnb-20201231.xsd#fmnb_DeferredTaxAssetsLeaseLiabilities" xlink:type="locator" xlink:label="fmnb_DeferredTaxAssetsLeaseLiabilities" />
    <link:label xml:lang="en-US" xlink:label="fmnb_DeferredTaxAssetsLeaseLiabilities_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Deferred tax assets lease liabilities.</link:label>
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    <link:loc xlink:href="fmnb-20201231.xsd#fmnb_DeferredTaxLiabilitiesDepreciationAndAmortization" xlink:type="locator" xlink:label="fmnb_DeferredTaxLiabilitiesDepreciationAndAmortization" />
    <link:label xml:lang="en-US" xlink:label="fmnb_DeferredTaxLiabilitiesDepreciationAndAmortization_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Deferred tax liabilities depreciation and amortization.</link:label>
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    <link:loc xlink:href="fmnb-20201231.xsd#fmnb_DeferredTaxLiabilitiesFederalHomeLoanBankStockDividends" xlink:type="locator" xlink:label="fmnb_DeferredTaxLiabilitiesFederalHomeLoanBankStockDividends" />
    <link:label xml:lang="en-US" xlink:label="fmnb_DeferredTaxLiabilitiesFederalHomeLoanBankStockDividends_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Deferred tax liabilities federal home loan bank stock dividends.</link:label>
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    <link:loc xlink:href="fmnb-20201231.xsd#fmnb_DeferredTaxLiabilityPurchaseAccountingAdjustment" xlink:type="locator" xlink:label="fmnb_DeferredTaxLiabilityPurchaseAccountingAdjustment" />
    <link:label xml:lang="en-US" xlink:label="fmnb_DeferredTaxLiabilityPurchaseAccountingAdjustment_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Deferred tax liability purchase accounting adjustment.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="fmnb_DeferredTaxLiabilityPurchaseAccountingAdjustment" xlink:to="fmnb_DeferredTaxLiabilityPurchaseAccountingAdjustment_lbl" />
    <link:loc xlink:href="fmnb-20201231.xsd#fmnb_DeferredTaxLiabilitiesLeaseRightOfUseAsset" xlink:type="locator" xlink:label="fmnb_DeferredTaxLiabilitiesLeaseRightOfUseAsset" />
    <link:label xml:lang="en-US" xlink:label="fmnb_DeferredTaxLiabilitiesLeaseRightOfUseAsset_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Deferred tax liabilities lease right of use asset.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="fmnb_DeferredTaxLiabilitiesLeaseRightOfUseAsset" xlink:to="fmnb_DeferredTaxLiabilitiesLeaseRightOfUseAsset_lbl" />
    <link:loc xlink:href="fmnb-20201231.xsd#fmnb_ServiceFeesSecurityGainsAndOtherNoninterestIncome" xlink:type="locator" xlink:label="fmnb_ServiceFeesSecurityGainsAndOtherNoninterestIncome" />
    <link:label xml:lang="en-US" xlink:label="fmnb_ServiceFeesSecurityGainsAndOtherNoninterestIncome_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Service fees, security gains and other noninterest income.</link:label>
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    <link:loc xlink:href="fmnb-20201231.xsd#fmnb_NoninterestExpenseExcludingAmortizationAndDepreciation" xlink:type="locator" xlink:label="fmnb_NoninterestExpenseExcludingAmortizationAndDepreciation" />
    <link:label xml:lang="en-US" xlink:label="fmnb_NoninterestExpenseExcludingAmortizationAndDepreciation_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Noninterest expense excluding amortization and depreciation.</link:label>
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    <link:loc xlink:href="fmnb-20201231.xsd#fmnb_MergerRelatedCostsIncome" xlink:type="locator" xlink:label="fmnb_MergerRelatedCostsIncome" />
    <link:label xml:lang="en-US" xlink:label="fmnb_MergerRelatedCostsIncome_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Merger related costs (income).</link:label>
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    <link:loc xlink:href="fmnb-20201231.xsd#fmnb_NoninterestExpenseExcludingMergerCosts" xlink:type="locator" xlink:label="fmnb_NoninterestExpenseExcludingMergerCosts" />
    <link:label xml:lang="en-US" xlink:label="fmnb_NoninterestExpenseExcludingMergerCosts_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Noninterest expense excluding merger costs.</link:label>
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    <link:loc xlink:href="fmnb-20201231.xsd#fmnb_GainLossOnDispositionOfFixedAssets" xlink:type="locator" xlink:label="fmnb_GainLossOnDispositionOfFixedAssets" />
    <link:label xml:lang="en-US" xlink:label="fmnb_GainLossOnDispositionOfFixedAssets_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Gain (loss) on disposition of fixed assets.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="fmnb_GainLossOnDispositionOfFixedAssets" xlink:to="fmnb_GainLossOnDispositionOfFixedAssets_lbl" />
    <link:loc xlink:href="fmnb-20201231.xsd#fmnb_ProceedsFromSaleOfEquitySecurities" xlink:type="locator" xlink:label="fmnb_ProceedsFromSaleOfEquitySecurities" />
    <link:label xml:lang="en-US" xlink:label="fmnb_ProceedsFromSaleOfEquitySecurities_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Proceeds from sale of equity securities.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="fmnb_ProceedsFromSaleOfEquitySecurities" xlink:to="fmnb_ProceedsFromSaleOfEquitySecurities_lbl" />
    <link:loc xlink:href="fmnb-20201231.xsd#fmnb_PurchaseOfEquitySecurities" xlink:type="locator" xlink:label="fmnb_PurchaseOfEquitySecurities" />
    <link:label xml:lang="en-US" xlink:label="fmnb_PurchaseOfEquitySecurities_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Purchase of equity securities.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="fmnb_PurchaseOfEquitySecurities" xlink:to="fmnb_PurchaseOfEquitySecurities_lbl" />
    <link:loc xlink:href="fmnb-20201231.xsd#fmnb_PurchaseOfRestrictedStock" xlink:type="locator" xlink:label="fmnb_PurchaseOfRestrictedStock" />
    <link:label xml:lang="en-US" xlink:label="fmnb_PurchaseOfRestrictedStock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Purchase of restricted stock.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="fmnb_PurchaseOfRestrictedStock" xlink:to="fmnb_PurchaseOfRestrictedStock_lbl" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2020/dei-2020-01-31.xsd#dei_CoverAbstract" xlink:type="locator" xlink:label="dei_CoverAbstract" />
    <link:label xml:lang="en-US" xlink:label="dei_CoverAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Cover [Abstract]</link:label>
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    <link:loc xlink:href="https://xbrl.sec.gov/dei/2020/dei-2020-01-31.xsd#dei_EntityRegistrantName" xlink:type="locator" xlink:label="dei_EntityRegistrantName" />
    <link:label xml:lang="en-US" xlink:label="dei_EntityRegistrantName_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Entity Registrant Name</link:label>
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    <link:label xml:lang="en-US" xlink:label="dei_EntityRegistrantName_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Entity Registrant Name</link:label>
    <link:label xml:lang="en-US" xlink:label="dei_EntityCentralIndexKey_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Entity Central Index Key</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2020/dei-2020-01-31.xsd#dei_EntityCurrentReportingStatus" xlink:type="locator" xlink:label="dei_EntityCurrentReportingStatus" />
    <link:label xml:lang="en-US" xlink:label="dei_EntityCurrentReportingStatus_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Current Reporting Status</link:label>
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    <link:label xml:lang="en-US" xlink:label="dei_EntityCurrentReportingStatus_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Entity Current Reporting Status</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2020/dei-2020-01-31.xsd#dei_EntityInteractiveDataCurrent" xlink:type="locator" xlink:label="dei_EntityInteractiveDataCurrent" />
    <link:label xml:lang="en-US" xlink:label="dei_EntityInteractiveDataCurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Interactive Data Current</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityInteractiveDataCurrent" xlink:to="dei_EntityInteractiveDataCurrent_lbl" />
    <link:label xml:lang="en-US" xlink:label="dei_EntityInteractiveDataCurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Entity Interactive Data Current</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2020/dei-2020-01-31.xsd#dei_DocumentType" xlink:type="locator" xlink:label="dei_DocumentType" />
    <link:label xml:lang="en-US" xlink:label="dei_DocumentType_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Document Type</link:label>
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    <link:label xml:lang="en-US" xlink:label="dei_DocumentType_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Document Type</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2020/dei-2020-01-31.xsd#dei_DocumentPeriodEndDate" xlink:type="locator" xlink:label="dei_DocumentPeriodEndDate" />
    <link:label xml:lang="en-US" xlink:label="dei_DocumentPeriodEndDate_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Document Period End Date</link:label>
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    <link:label xml:lang="en-US" xlink:label="dei_DocumentPeriodEndDate_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Document Period End Date</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2020/dei-2020-01-31.xsd#dei_AmendmentFlag" xlink:type="locator" xlink:label="dei_AmendmentFlag" />
    <link:label xml:lang="en-US" xlink:label="dei_AmendmentFlag_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Amendment Flag</link:label>
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    <link:label xml:lang="en-US" xlink:label="dei_AmendmentFlag_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Amendment Flag</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2020/dei-2020-01-31.xsd#dei_DocumentFiscalYearFocus" xlink:type="locator" xlink:label="dei_DocumentFiscalYearFocus" />
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    <link:label xml:lang="en-US" xlink:label="fmnb_FederalFundsSoldAndOther_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Federal funds sold and other</link:label>
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AvailableForSaleSecuritiesDebtSecurities" xlink:type="locator" xlink:label="us-gaap_AvailableForSaleSecuritiesDebtSecurities" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_AvailableForSaleSecuritiesDebtSecurities_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Securities available for sale</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_AvailableForSaleSecuritiesDebtSecurities_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Available For Sale Securities Debt Securities</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_EquitySecuritiesFvNi" xlink:type="locator" xlink:label="us-gaap_EquitySecuritiesFvNi" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_EquitySecuritiesFvNi_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Equity securities</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_EquitySecuritiesFvNi_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Equity Securities Fv Ni</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LoansReceivableHeldForSaleNetNotPartOfDisposalGroup" xlink:type="locator" xlink:label="us-gaap_LoansReceivableHeldForSaleNetNotPartOfDisposalGroup" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LoansReceivableHeldForSaleNetNotPartOfDisposalGroup_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Loans held for sale</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LoansReceivableHeldForSaleNetNotPartOfDisposalGroup" xlink:to="us-gaap_LoansReceivableHeldForSaleNetNotPartOfDisposalGroup_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LoansReceivableHeldForSaleNetNotPartOfDisposalGroup_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Loans Receivable Held For Sale Net Not Part Of Disposal Group</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome" xlink:type="locator" xlink:label="us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Loans</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome" xlink:to="us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Loans And Leases Receivable Net Of Deferred Income</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LoansAndLeasesReceivableAllowance" xlink:type="locator" xlink:label="us-gaap_LoansAndLeasesReceivableAllowance" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LoansAndLeasesReceivableAllowance_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Less allowance for loan losses</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LoansAndLeasesReceivableAllowance" xlink:to="us-gaap_LoansAndLeasesReceivableAllowance_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LoansAndLeasesReceivableAllowance_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Loans And Leases Receivable Allowance</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LoansAndLeasesReceivableNetReportedAmount" xlink:type="locator" xlink:label="us-gaap_LoansAndLeasesReceivableNetReportedAmount" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LoansAndLeasesReceivableNetReportedAmount_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel">NET LOANS</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LoansAndLeasesReceivableNetReportedAmount" xlink:to="us-gaap_LoansAndLeasesReceivableNetReportedAmount_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LoansAndLeasesReceivableNetReportedAmount_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Loans And Leases Receivable Net Reported Amount</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PropertyPlantAndEquipmentNet" xlink:type="locator" xlink:label="us-gaap_PropertyPlantAndEquipmentNet" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_PropertyPlantAndEquipmentNet_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Premises and equipment, net</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PropertyPlantAndEquipmentNet" xlink:to="us-gaap_PropertyPlantAndEquipmentNet_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_PropertyPlantAndEquipmentNet_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Property Plant And Equipment Net</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_Goodwill" xlink:type="locator" xlink:label="us-gaap_Goodwill" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_Goodwill_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Goodwill</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_Goodwill" xlink:to="us-gaap_Goodwill_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_Goodwill_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Goodwill</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsNet" xlink:type="locator" xlink:label="us-gaap_FiniteLivedIntangibleAssetsNet" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FiniteLivedIntangibleAssetsNet_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Other intangibles, net</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_FiniteLivedIntangibleAssetsNet_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Finite Lived Intangible Assets Net</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_BankOwnedLifeInsurance" xlink:type="locator" xlink:label="us-gaap_BankOwnedLifeInsurance" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_BankOwnedLifeInsurance_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Bank owned life insurance</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_BankOwnedLifeInsurance_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Bank Owned Life Insurance</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OtherAssets" xlink:type="locator" xlink:label="us-gaap_OtherAssets" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_OtherAssets_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Other assets</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OtherAssets" xlink:to="us-gaap_OtherAssets_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_OtherAssets_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Other Assets</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_Assets" xlink:type="locator" xlink:label="us-gaap_Assets" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_Assets_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel">TOTAL ASSETS</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_Assets" xlink:to="us-gaap_Assets_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_Assets_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Assets</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LiabilitiesAndStockholdersEquityAbstract" xlink:type="locator" xlink:label="us-gaap_LiabilitiesAndStockholdersEquityAbstract" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LiabilitiesAndStockholdersEquityAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">LIABILITIES AND STOCKHOLDERS&apos; EQUITY</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_DepositsAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Deposits:</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_DepositsAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Deposits [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_NoninterestBearingDepositLiabilities" xlink:type="locator" xlink:label="us-gaap_NoninterestBearingDepositLiabilities" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_NoninterestBearingDepositLiabilities_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Noninterest-bearing</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_NoninterestBearingDepositLiabilities_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Noninterest Bearing Deposit Liabilities</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_InterestBearingDepositLiabilities" xlink:type="locator" xlink:label="us-gaap_InterestBearingDepositLiabilities" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_InterestBearingDepositLiabilities_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Interest-bearing</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_InterestBearingDepositLiabilities_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Interest Bearing Deposit Liabilities</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_Deposits_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel">TOTAL DEPOSITS</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_Deposits_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Deposits</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShortTermBorrowings" xlink:type="locator" xlink:label="us-gaap_ShortTermBorrowings" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ShortTermBorrowings_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Short-term borrowings</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_ShortTermBorrowings_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Short Term Borrowings</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_LongTermDebt_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Long-term borrowings</link:label>
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OtherLiabilities" xlink:type="locator" xlink:label="us-gaap_OtherLiabilities" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_OtherLiabilities_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Other liabilities</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_OtherLiabilities_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Other Liabilities</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_Liabilities" xlink:type="locator" xlink:label="us-gaap_Liabilities" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_Liabilities_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel">TOTAL LIABILITIES</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_Liabilities_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Liabilities</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_CommitmentsAndContingencies_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Commitments and contingent liabilities (Note 13)</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_CommitmentsAndContingencies_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Commitments And Contingencies</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StockholdersEquityAbstract" xlink:type="locator" xlink:label="us-gaap_StockholdersEquityAbstract" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_StockholdersEquityAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Stockholders&apos; equity</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockholdersEquityAbstract" xlink:to="us-gaap_StockholdersEquityAbstract_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_StockholdersEquityAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Stockholders Equity [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CommonStockValue" xlink:type="locator" xlink:label="us-gaap_CommonStockValue" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_CommonStockValue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Common Stock - Authorized 50,000,000 shares in 2020 and 2019; issued 29,577,827 in 2020 and 28,179,598 in 2019</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CommonStockValue" xlink:to="us-gaap_CommonStockValue_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_CommonStockValue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Common Stock Value</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RetainedEarningsAccumulatedDeficit" xlink:type="locator" xlink:label="us-gaap_RetainedEarningsAccumulatedDeficit" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_RetainedEarningsAccumulatedDeficit_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Retained earnings</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RetainedEarningsAccumulatedDeficit" xlink:to="us-gaap_RetainedEarningsAccumulatedDeficit_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_RetainedEarningsAccumulatedDeficit_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Retained Earnings Accumulated Deficit</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax" xlink:type="locator" xlink:label="us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accumulated other comprehensive income</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax" xlink:to="us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Accumulated Other Comprehensive Income Loss Net Of Tax</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_TreasuryStockValue" xlink:type="locator" xlink:label="us-gaap_TreasuryStockValue" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_TreasuryStockValue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Treasury stock, at cost; 1,387,655 shares in 2020 and 508,859 shares in 2019</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_TreasuryStockValue" xlink:to="us-gaap_TreasuryStockValue_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_TreasuryStockValue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Treasury Stock Value</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StockholdersEquity" xlink:type="locator" xlink:label="us-gaap_StockholdersEquity" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_StockholdersEquity_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel">TOTAL STOCKHOLDERS&apos; EQUITY</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockholdersEquity" xlink:to="us-gaap_StockholdersEquity_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_StockholdersEquity_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Stockholders Equity</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LiabilitiesAndStockholdersEquity" xlink:type="locator" xlink:label="us-gaap_LiabilitiesAndStockholdersEquity" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LiabilitiesAndStockholdersEquity_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel">TOTAL LIABILITIES AND STOCKHOLDERS&apos; EQUITY</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LiabilitiesAndStockholdersEquity" xlink:to="us-gaap_LiabilitiesAndStockholdersEquity_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LiabilitiesAndStockholdersEquity_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Liabilities And Stockholders Equity</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CommonStockSharesAuthorized" xlink:type="locator" xlink:label="us-gaap_CommonStockSharesAuthorized" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_CommonStockSharesAuthorized_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Common stock, shares authorized</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CommonStockSharesAuthorized" xlink:to="us-gaap_CommonStockSharesAuthorized_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_CommonStockSharesAuthorized_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Common Stock Shares Authorized</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CommonStockSharesIssued" xlink:type="locator" xlink:label="us-gaap_CommonStockSharesIssued" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_CommonStockSharesIssued_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Common stock, shares issued</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CommonStockSharesIssued" xlink:to="us-gaap_CommonStockSharesIssued_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_CommonStockSharesIssued_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Common Stock Shares Issued</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_TreasuryStockShares" xlink:type="locator" xlink:label="us-gaap_TreasuryStockShares" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_TreasuryStockShares_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Treasury stock, shares</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_TreasuryStockShares" xlink:to="us-gaap_TreasuryStockShares_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_TreasuryStockShares_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Treasury Stock Shares</link:label>
    <link:loc xlink:href="fmnb-20201231.xsd#fmnb_FederalFundsSoldAndOtherInterestIncome" xlink:type="locator" xlink:label="fmnb_FederalFundsSoldAndOtherInterestIncome" />
    <link:label xml:lang="en-US" xlink:label="fmnb_FederalFundsSoldAndOtherInterestIncome_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Federal funds sold and other interest income.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="fmnb_FederalFundsSoldAndOtherInterestIncome" xlink:to="fmnb_FederalFundsSoldAndOtherInterestIncome_lbl" />
    <link:loc xlink:href="fmnb-20201231.xsd#fmnb_MergerRelatedCostsIncomes" xlink:type="locator" xlink:label="fmnb_MergerRelatedCostsIncomes" />
    <link:label xml:lang="en-US" xlink:label="fmnb_MergerRelatedCostsIncomes_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Merger related costs (income).</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="fmnb_MergerRelatedCostsIncomes" xlink:to="fmnb_MergerRelatedCostsIncomes_lbl" />
    <link:loc xlink:href="fmnb-20201231.xsd#fmnb_CoreProcessingCharge" xlink:type="locator" xlink:label="fmnb_CoreProcessingCharge" />
    <link:label xml:lang="en-US" xlink:label="fmnb_CoreProcessingCharge_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Core processing charge.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="fmnb_CoreProcessingCharge" xlink:to="fmnb_CoreProcessingCharge_lbl" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IncomeStatementAbstract" xlink:type="locator" xlink:label="us-gaap_IncomeStatementAbstract" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_IncomeStatementAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Income Statement [Abstract]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncomeStatementAbstract" xlink:to="us-gaap_IncomeStatementAbstract_lbl" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StatementTable" xlink:type="locator" xlink:label="us-gaap_StatementTable" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_StatementTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Statement [Table]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StatementTable" xlink:to="us-gaap_StatementTable_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_StatementTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Statement [Table]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_ProductOrServiceAxis" xlink:type="locator" xlink:label="srt_ProductOrServiceAxis" />
    <link:label xml:lang="en-US" xlink:label="srt_ProductOrServiceAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Product and Service</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="srt_ProductOrServiceAxis" xlink:to="srt_ProductOrServiceAxis_lbl" />
    <link:label xml:lang="en-US" xlink:label="srt_ProductOrServiceAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Product Or Service [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_ProductsAndServicesDomain" xlink:type="locator" xlink:label="srt_ProductsAndServicesDomain" />
    <link:label xml:lang="en-US" xlink:label="srt_ProductsAndServicesDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Product and Service</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="srt_ProductsAndServicesDomain" xlink:to="srt_ProductsAndServicesDomain_lbl" />
    <link:label xml:lang="en-US" xlink:label="srt_ProductsAndServicesDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Products And Services [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DepositAccountMember" xlink:type="locator" xlink:label="us-gaap_DepositAccountMember" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DepositAccountMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Service Charges on Deposit Accounts</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DepositAccountMember" xlink:to="us-gaap_DepositAccountMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DepositAccountMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Deposit Account [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FiduciaryAndTrustMember" xlink:type="locator" xlink:label="us-gaap_FiduciaryAndTrustMember" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FiduciaryAndTrustMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Trust Fees</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FiduciaryAndTrustMember" xlink:to="us-gaap_FiduciaryAndTrustMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FiduciaryAndTrustMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Fiduciary And Trust [Member]</link:label>
    <link:loc xlink:href="fmnb-20201231.xsd#fmnb_InsuranceAgencyCommissionsMember" xlink:type="locator" xlink:label="fmnb_InsuranceAgencyCommissionsMember" />
    <link:label xml:lang="en-US" xlink:label="fmnb_InsuranceAgencyCommissionsMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Insurance agency commissions.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="fmnb_InsuranceAgencyCommissionsMember" xlink:to="fmnb_InsuranceAgencyCommissionsMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="fmnb_InsuranceAgencyCommissionsMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Insurance Agency Commissions</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_InsuranceAgencyCommissionsMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Insurance Agency Commissions [Member]</link:label>
    <link:loc xlink:href="fmnb-20201231.xsd#fmnb_RetirementPlanConsultingFeesMember" xlink:type="locator" xlink:label="fmnb_RetirementPlanConsultingFeesMember" />
    <link:label xml:lang="en-US" xlink:label="fmnb_RetirementPlanConsultingFeesMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Retirement plan consulting fees.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="fmnb_RetirementPlanConsultingFeesMember" xlink:to="fmnb_RetirementPlanConsultingFeesMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="fmnb_RetirementPlanConsultingFeesMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Retirement Plan Consulting Fees</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_RetirementPlanConsultingFeesMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Retirement Plan Consulting Fees [Member]</link:label>
    <link:loc xlink:href="fmnb-20201231.xsd#fmnb_InvestmentCommissionsMember" xlink:type="locator" xlink:label="fmnb_InvestmentCommissionsMember" />
    <link:label xml:lang="en-US" xlink:label="fmnb_InvestmentCommissionsMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Investment commissions.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="fmnb_InvestmentCommissionsMember" xlink:to="fmnb_InvestmentCommissionsMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="fmnb_InvestmentCommissionsMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Investment Commissions</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_InvestmentCommissionsMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Investment Commissions [Member]</link:label>
    <link:loc xlink:href="fmnb-20201231.xsd#fmnb_DebitCardAndElectronicFundsTransferFeesMember" xlink:type="locator" xlink:label="fmnb_DebitCardAndElectronicFundsTransferFeesMember" />
    <link:label xml:lang="en-US" xlink:label="fmnb_DebitCardAndElectronicFundsTransferFeesMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Debit card and electronic funds transfer fees.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="fmnb_DebitCardAndElectronicFundsTransferFeesMember" xlink:to="fmnb_DebitCardAndElectronicFundsTransferFeesMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="fmnb_DebitCardAndElectronicFundsTransferFeesMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Debit Card and EFT Fees</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_DebitCardAndElectronicFundsTransferFeesMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Debit Card And Electronic Funds Transfer Fees [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StatementLineItems" xlink:type="locator" xlink:label="us-gaap_StatementLineItems" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_StatementLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Statement [Line Items]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StatementLineItems" xlink:to="us-gaap_StatementLineItems_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_StatementLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Statement [Line Items]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_InterestAndDividendIncomeOperatingAbstract" xlink:type="locator" xlink:label="us-gaap_InterestAndDividendIncomeOperatingAbstract" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_InterestAndDividendIncomeOperatingAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">INTEREST AND DIVIDEND INCOME</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InterestAndDividendIncomeOperatingAbstract" xlink:to="us-gaap_InterestAndDividendIncomeOperatingAbstract_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_InterestAndDividendIncomeOperatingAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Interest And Dividend Income Operating [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_InterestAndFeeIncomeLoansAndLeases" xlink:type="locator" xlink:label="us-gaap_InterestAndFeeIncomeLoansAndLeases" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_InterestAndFeeIncomeLoansAndLeases_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Loans, including fees</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InterestAndFeeIncomeLoansAndLeases" xlink:to="us-gaap_InterestAndFeeIncomeLoansAndLeases_lbl" />
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    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="srt_CumulativeEffectPeriodOfAdoptionAxis" xlink:to="srt_CumulativeEffectPeriodOfAdoptionAxis_lbl" />
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    <link:loc xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_CumulativeEffectPeriodOfAdoptionDomain" xlink:type="locator" xlink:label="srt_CumulativeEffectPeriodOfAdoptionDomain" />
    <link:label xml:lang="en-US" xlink:label="srt_CumulativeEffectPeriodOfAdoptionDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Cumulative Effect, Period of Adoption</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="srt_CumulativeEffectPeriodOfAdoptionDomain" xlink:to="srt_CumulativeEffectPeriodOfAdoptionDomain_lbl" />
    <link:label xml:lang="en-US" xlink:label="srt_CumulativeEffectPeriodOfAdoptionDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Cumulative Effect Period Of Adoption [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_CumulativeEffectPeriodOfAdoptionAdjustmentMember" xlink:type="locator" xlink:label="srt_CumulativeEffectPeriodOfAdoptionAdjustmentMember" />
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    <link:loc xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_CumulativeEffectPeriodOfAdoptionAdjustedBalanceMember" xlink:type="locator" xlink:label="srt_CumulativeEffectPeriodOfAdoptionAdjustedBalanceMember" />
    <link:label xml:lang="en-US" xlink:label="srt_CumulativeEffectPeriodOfAdoptionAdjustedBalanceMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Adjusted Balance</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="srt_CumulativeEffectPeriodOfAdoptionAdjustedBalanceMember" xlink:to="srt_CumulativeEffectPeriodOfAdoptionAdjustedBalanceMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="srt_CumulativeEffectPeriodOfAdoptionAdjustedBalanceMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Cumulative Effect Period Of Adoption Adjusted Balance [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="us-gaap_StockholdersEquity_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Balance at beginning of year</link:label>
    <link:label xml:lang="en-US" xlink:label="us-gaap_NetIncomeLoss_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Net income</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_StockIssuedDuringPeriodValueTreasuryStockReissuedUnderLongTermIncentivePlan_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Issued treasury shares under the Long Term Incentive Plan</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_StockIssuedDuringPeriodValueTreasuryStockReissuedUnderLongTermIncentivePlan_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Stock Issued During Period Value Treasury Stock Reissued Under Long Term Incentive Plan</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StockIssuedDuringPeriodValueAcquisitions" xlink:type="locator" xlink:label="us-gaap_StockIssuedDuringPeriodValueAcquisitions" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_StockIssuedDuringPeriodValueAcquisitions_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Shares issued in contingent payments as part of a business combination</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockIssuedDuringPeriodValueAcquisitions" xlink:to="us-gaap_StockIssuedDuringPeriodValueAcquisitions_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_StockIssuedDuringPeriodValueAcquisitions_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Stock Issued During Period Value Acquisitions</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation" xlink:type="locator" xlink:label="us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Stock compensation expense for unvested shares</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation" xlink:to="us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Stock Issued During Period Value Share Based Compensation</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_TaxCutsAndJobsActOf2017ReclassificationFromAociToRetainedEarningsTaxEffect" xlink:type="locator" xlink:label="us-gaap_TaxCutsAndJobsActOf2017ReclassificationFromAociToRetainedEarningsTaxEffect" />
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    <link:label xml:lang="en-US" xlink:label="us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Other comprehensive income (loss)</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DividendsCommonStockCash" xlink:type="locator" xlink:label="us-gaap_DividendsCommonStockCash" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DividendsCommonStockCash_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Dividends declared</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DividendsCommonStockCash" xlink:to="us-gaap_DividendsCommonStockCash_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DividendsCommonStockCash_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Dividends Common Stock Cash</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_TreasuryStockValueAcquiredCostMethod_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Treasury Stock Value Acquired Cost Method</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_StockholdersEquity_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Balance at end of year</link:label>
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    <link:label xml:lang="en-US" xlink:label="fmnb_StockholdersEquityAdjustedBalance_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Beginning balance adjusted</link:label>
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    <link:loc xlink:href="fmnb-20201231.xsd#fmnb_StockIssuedDuringPeriodSharesUnderLongTermIncentivePlan" xlink:type="locator" xlink:label="fmnb_StockIssuedDuringPeriodSharesUnderLongTermIncentivePlan" />
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    <link:loc xlink:href="fmnb-20201231.xsd#fmnb_StockIssuedDuringPeriodSharesTreasuryStockReissuedUnderLongTermIncentivePlan" xlink:type="locator" xlink:label="fmnb_StockIssuedDuringPeriodSharesTreasuryStockReissuedUnderLongTermIncentivePlan" />
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    <link:label xml:lang="en-US" xlink:label="fmnb_StockIssuedDuringPeriodSharesTreasuryStockReissuedUnderLongTermIncentivePlan_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Treasury shares issued under the Long Term Incentive Plan</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_StockIssuedDuringPeriodSharesTreasuryStockReissuedUnderLongTermIncentivePlan_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Stock Issued During Period Shares Treasury Stock Reissued Under Long Term Incentive Plan</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_StockIssuedDuringPeriodSharesAcquisitions_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Stock Issued During Period Shares Acquisitions</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CommonStockDividendsPerShareDeclared" xlink:type="locator" xlink:label="us-gaap_CommonStockDividendsPerShareDeclared" />
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_SharesPaidForTaxWithholdingForShareBasedCompensation" xlink:type="locator" xlink:label="us-gaap_SharesPaidForTaxWithholdingForShareBasedCompensation" />
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    <link:loc xlink:href="fmnb-20201231.xsd#fmnb_SecurityPurchasesNotSettled" xlink:type="locator" xlink:label="fmnb_SecurityPurchasesNotSettled" />
    <link:label xml:lang="en-US" xlink:label="fmnb_SecurityPurchasesNotSettled_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Security purchases not settled.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="fmnb_SecurityPurchasesNotSettled" xlink:to="fmnb_SecurityPurchasesNotSettled_lbl" />
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    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StatementOfCashFlowsAbstract" xlink:to="us-gaap_StatementOfCashFlowsAbstract_lbl" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract" xlink:type="locator" xlink:label="us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">CASH FLOWS FROM OPERATING ACTIVITIES</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract" xlink:to="us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Net Cash Provided By Used In Operating Activities [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract" xlink:type="locator" xlink:label="us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract" />
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DepreciationAmortizationAndAccretionNet" xlink:type="locator" xlink:label="us-gaap_DepreciationAmortizationAndAccretionNet" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DepreciationAmortizationAndAccretionNet_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Depreciation and amortization</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_DepreciationAmortizationAndAccretionNet_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Depreciation Amortization And Accretion Net</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AmortizationOfDebtDiscountPremium" xlink:type="locator" xlink:label="us-gaap_AmortizationOfDebtDiscountPremium" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_AmortizationOfDebtDiscountPremium_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Net amortization of securities</link:label>
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DebtSecuritiesGainLoss" xlink:type="locator" xlink:label="us-gaap_DebtSecuritiesGainLoss" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DebtSecuritiesGainLoss_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Available for sale security (gains) loss</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtSecuritiesGainLoss" xlink:to="us-gaap_DebtSecuritiesGainLoss_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DebtSecuritiesGainLoss_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Debt Securities Gain Loss</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_EquitySecuritiesFvNiRealizedGainLoss" xlink:type="locator" xlink:label="us-gaap_EquitySecuritiesFvNiRealizedGainLoss" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_EquitySecuritiesFvNiRealizedGainLoss_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Realized and unrealized losses (gains) on equity securities</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_EquitySecuritiesFvNiRealizedGainLoss_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Equity Securities Fv Ni Realized Gain Loss</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_GainLossOnSaleOfPropertyPlantEquipment" xlink:type="locator" xlink:label="us-gaap_GainLossOnSaleOfPropertyPlantEquipment" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_GainLossOnSaleOfPropertyPlantEquipment_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Loss on land and building sales, net</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_GainLossOnSaleOfPropertyPlantEquipment" xlink:to="us-gaap_GainLossOnSaleOfPropertyPlantEquipment_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_GainLossOnSaleOfPropertyPlantEquipment_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Gain Loss On Sale Of Property Plant Equipment</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensation" xlink:type="locator" xlink:label="us-gaap_ShareBasedCompensation" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensation_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Stock compensation expense</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensation_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Share Based Compensation</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_GainLossOnSaleOfProperties" xlink:type="locator" xlink:label="us-gaap_GainLossOnSaleOfProperties" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_GainLossOnSaleOfProperties_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">(Gains) loss on sale of other real estate owned</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_BankOwnedLifeInsuranceIncome_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Earnings on bank owned life insurance</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_GainLossOnDispositionOfFixedAssets_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Loss on fixed asset disposal</link:label>
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PaymentsForOriginationOfMortgageLoansHeldForSale" xlink:type="locator" xlink:label="us-gaap_PaymentsForOriginationOfMortgageLoansHeldForSale" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_PaymentsForOriginationOfMortgageLoansHeldForSale_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Origination of loans held for sale</link:label>
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ProceedsFromSaleOfLoansHeldForSale" xlink:type="locator" xlink:label="us-gaap_ProceedsFromSaleOfLoansHeldForSale" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ProceedsFromSaleOfLoansHeldForSale_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Proceeds from loans held for sale</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_ProceedsFromSaleOfLoansHeldForSale_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Proceeds From Sale Of Loans Held For Sale</link:label>
    <link:label xml:lang="en-US" xlink:label="us-gaap_GainLossOnSalesOfLoansNet_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Net gains on sale of loans</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IncreaseDecreaseInOtherOperatingCapitalNet" xlink:type="locator" xlink:label="us-gaap_IncreaseDecreaseInOtherOperatingCapitalNet" />
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivities" xlink:type="locator" xlink:label="us-gaap_NetCashProvidedByUsedInOperatingActivities" />
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    <link:label xml:lang="en-US" xlink:label="us-gaap_NetCashProvidedByUsedInOperatingActivities_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Net Cash Provided By Used In Operating Activities</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract" xlink:type="locator" xlink:label="us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract" />
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities" xlink:type="locator" xlink:label="us-gaap_ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities" />
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    <link:label xml:lang="en-US" xlink:label="us-gaap_ProceedsFromSaleOfAvailableForSaleSecuritiesDebt_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Proceeds from sales of securities available for sale</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_ProceedsFromSaleOfAvailableForSaleSecuritiesDebt_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Proceeds From Sale Of Available For Sale Securities Debt</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PaymentsToAcquireAvailableForSaleSecuritiesDebt" xlink:type="locator" xlink:label="us-gaap_PaymentsToAcquireAvailableForSaleSecuritiesDebt" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_PaymentsToAcquireAvailableForSaleSecuritiesDebt_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Purchases of securities available for sale</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_ProceedsFromInsuranceSettlementInvestingActivities_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Proceeds from BOLI death benefits</link:label>
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PaymentsForProceedsFromLifeInsurancePolicies" xlink:type="locator" xlink:label="us-gaap_PaymentsForProceedsFromLifeInsurancePolicies" />
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CondensedFinancialInformationOfParentCompanyOnlyDisclosureTextBlock" xlink:type="locator" xlink:label="us-gaap_CondensedFinancialInformationOfParentCompanyOnlyDisclosureTextBlock" />
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    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CondensedFinancialInformationOfParentCompanyOnlyDisclosureTextBlock" xlink:to="us-gaap_CondensedFinancialInformationOfParentCompanyOnlyDisclosureTextBlock_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_CondensedFinancialInformationOfParentCompanyOnlyDisclosureTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Condensed Financial Information Of Parent Company Only Disclosure [Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ConsolidationPolicyTextBlock" xlink:type="locator" xlink:label="us-gaap_ConsolidationPolicyTextBlock" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ConsolidationPolicyTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Principles of Consolidation</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ConsolidationPolicyTextBlock" xlink:to="us-gaap_ConsolidationPolicyTextBlock_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ConsolidationPolicyTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Consolidation Policy [Text Block]</link:label>
    <link:loc xlink:href="fmnb-20201231.xsd#fmnb_CorporateReorganizationPolicyTextBlock" xlink:type="locator" xlink:label="fmnb_CorporateReorganizationPolicyTextBlock" />
    <link:label xml:lang="en-US" xlink:label="fmnb_CorporateReorganizationPolicyTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Corporate reorganization.</link:label>
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    <link:label xml:lang="en-US" xlink:label="fmnb_CorporateReorganizationPolicyTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Corporate Reorganization Policy [Text Block]</link:label>
    <link:loc xlink:href="fmnb-20201231.xsd#fmnb_NatureOfOperationsPolicyTextBlock" xlink:type="locator" xlink:label="fmnb_NatureOfOperationsPolicyTextBlock" />
    <link:label xml:lang="en-US" xlink:label="fmnb_NatureOfOperationsPolicyTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Nature of operations.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="fmnb_NatureOfOperationsPolicyTextBlock" xlink:to="fmnb_NatureOfOperationsPolicyTextBlock_lbl" />
    <link:label xml:lang="en-US" xlink:label="fmnb_NatureOfOperationsPolicyTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Nature of Operations</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_NatureOfOperationsPolicyTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Nature Of Operations Policy [Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_UseOfEstimates" xlink:type="locator" xlink:label="us-gaap_UseOfEstimates" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_UseOfEstimates_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Estimates</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_UseOfEstimates" xlink:to="us-gaap_UseOfEstimates_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_UseOfEstimates_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Use Of Estimates</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CashAndCashEquivalentsPolicyTextBlock" xlink:type="locator" xlink:label="us-gaap_CashAndCashEquivalentsPolicyTextBlock" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_CashAndCashEquivalentsPolicyTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Cash Flows</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CashAndCashEquivalentsPolicyTextBlock" xlink:to="us-gaap_CashAndCashEquivalentsPolicyTextBlock_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_CashAndCashEquivalentsPolicyTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Cash And Cash Equivalents Policy [Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_MarketableSecuritiesPolicy" xlink:type="locator" xlink:label="us-gaap_MarketableSecuritiesPolicy" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_MarketableSecuritiesPolicy_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Securities</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_MarketableSecuritiesPolicy" xlink:to="us-gaap_MarketableSecuritiesPolicy_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_MarketableSecuritiesPolicy_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Marketable Securities Policy</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FinanceLoanAndLeaseReceivablesHeldForSalePolicy" xlink:type="locator" xlink:label="us-gaap_FinanceLoanAndLeaseReceivablesHeldForSalePolicy" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FinanceLoanAndLeaseReceivablesHeldForSalePolicy_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Loans Held for Sale</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FinanceLoanAndLeaseReceivablesHeldForSalePolicy" xlink:to="us-gaap_FinanceLoanAndLeaseReceivablesHeldForSalePolicy_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FinanceLoanAndLeaseReceivablesHeldForSalePolicy_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Finance Loan And Lease Receivables Held For Sale Policy</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FinanceLoansAndLeasesReceivablePolicy" xlink:type="locator" xlink:label="us-gaap_FinanceLoansAndLeasesReceivablePolicy" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FinanceLoansAndLeasesReceivablePolicy_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Loans</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FinanceLoansAndLeasesReceivablePolicy" xlink:to="us-gaap_FinanceLoansAndLeasesReceivablePolicy_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FinanceLoansAndLeasesReceivablePolicy_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Finance Loans And Leases Receivable Policy</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ImpairedFinancingReceivablePolicyPolicyTextBlock" xlink:type="locator" xlink:label="us-gaap_ImpairedFinancingReceivablePolicyPolicyTextBlock" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ImpairedFinancingReceivablePolicyPolicyTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Purchased Credit Impaired Loans</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ImpairedFinancingReceivablePolicyPolicyTextBlock" xlink:to="us-gaap_ImpairedFinancingReceivablePolicyPolicyTextBlock_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ImpairedFinancingReceivablePolicyPolicyTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Impaired Financing Receivable Policy Policy [Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DerivativesPolicyTextBlock" xlink:type="locator" xlink:label="us-gaap_DerivativesPolicyTextBlock" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DerivativesPolicyTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Derivatives</link:label>
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ConcentrationRiskCreditRisk" xlink:type="locator" xlink:label="us-gaap_ConcentrationRiskCreditRisk" />
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LoansAndLeasesReceivableAllowanceForLoanLossesPolicy" xlink:type="locator" xlink:label="us-gaap_LoansAndLeasesReceivableAllowanceForLoanLossesPolicy" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LoansAndLeasesReceivableAllowanceForLoanLossesPolicy_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Allowance for Loan Losses</link:label>
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    <link:loc xlink:href="fmnb-20201231.xsd#fmnb_ServicingRightsPolicyTextBlock" xlink:type="locator" xlink:label="fmnb_ServicingRightsPolicyTextBlock" />
    <link:label xml:lang="en-US" xlink:label="fmnb_ServicingRightsPolicyTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Servicing rights.</link:label>
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FinanceLoanAndLeaseReceivablesHeldForInvestmentsForeclosedAssetsPolicy" xlink:type="locator" xlink:label="us-gaap_FinanceLoanAndLeaseReceivablesHeldForInvestmentsForeclosedAssetsPolicy" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FinanceLoanAndLeaseReceivablesHeldForInvestmentsForeclosedAssetsPolicy_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Foreclosed Assets</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_FinanceLoanAndLeaseReceivablesHeldForInvestmentsForeclosedAssetsPolicy_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Finance Loan And Lease Receivables Held For Investments Foreclosed Assets Policy</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PropertyPlantAndEquipmentPolicyTextBlock" xlink:type="locator" xlink:label="us-gaap_PropertyPlantAndEquipmentPolicyTextBlock" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_PropertyPlantAndEquipmentPolicyTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Premises and Equipment</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_PropertyPlantAndEquipmentPolicyTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Property Plant And Equipment Policy [Text Block]</link:label>
    <link:loc xlink:href="fmnb-20201231.xsd#fmnb_RestrictedStockPolicyTextBlock" xlink:type="locator" xlink:label="fmnb_RestrictedStockPolicyTextBlock" />
    <link:label xml:lang="en-US" xlink:label="fmnb_RestrictedStockPolicyTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Restricted stock.</link:label>
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    <link:loc xlink:href="fmnb-20201231.xsd#fmnb_BankOwnedLifeInsurancePolicyTextBlock" xlink:type="locator" xlink:label="fmnb_BankOwnedLifeInsurancePolicyTextBlock" />
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    <link:label xml:lang="en-US" xlink:label="fmnb_BankOwnedLifeInsurancePolicyTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Bank Owned Life Insurance</link:label>
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ImpairmentOrDisposalOfLongLivedAssetsPolicyTextBlock" xlink:type="locator" xlink:label="us-gaap_ImpairmentOrDisposalOfLongLivedAssetsPolicyTextBlock" />
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    <link:label xml:lang="en-US" xlink:label="us-gaap_ImpairmentOrDisposalOfLongLivedAssetsPolicyTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Impairment Or Disposal Of Long Lived Assets Policy [Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_GoodwillAndIntangibleAssetsPolicyTextBlock" xlink:type="locator" xlink:label="us-gaap_GoodwillAndIntangibleAssetsPolicyTextBlock" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_GoodwillAndIntangibleAssetsPolicyTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Goodwill and Other Intangible Assets</link:label>
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    <link:loc xlink:href="fmnb-20201231.xsd#fmnb_LoanCommitmentsAndRelatedFinancialInstrumentsPolicyTextBlock" xlink:type="locator" xlink:label="fmnb_LoanCommitmentsAndRelatedFinancialInstrumentsPolicyTextBlock" />
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationOptionAndIncentivePlansPolicy" xlink:type="locator" xlink:label="us-gaap_ShareBasedCompensationOptionAndIncentivePlansPolicy" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationOptionAndIncentivePlansPolicy_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Stock-Based Compensation</link:label>
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    <link:label xml:lang="en-US" xlink:label="fmnb_ImpairedLoansAcquiredAccretableYieldChangeTableTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Impaired loans acquired Accretable yield change.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="fmnb_ImpairedLoansAcquiredAccretableYieldChangeTableTextBlock" xlink:to="fmnb_ImpairedLoansAcquiredAccretableYieldChangeTableTextBlock_lbl" />
    <link:label xml:lang="en-US" xlink:label="fmnb_ImpairedLoansAcquiredAccretableYieldChangeTableTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Accretable Yield or Income Expected to be Collected</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_ImpairedLoansAcquiredAccretableYieldChangeTableTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Impaired Loans Acquired Accretable Yield Change Table [Text Block]</link:label>
    <link:loc xlink:href="fmnb-20201231.xsd#fmnb_ScheduleOfAllowanceForLoanLossByPortfolioSegmentTableTextBlock" xlink:type="locator" xlink:label="fmnb_ScheduleOfAllowanceForLoanLossByPortfolioSegmentTableTextBlock" />
    <link:label xml:lang="en-US" xlink:label="fmnb_ScheduleOfAllowanceForLoanLossByPortfolioSegmentTableTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Schedule of allowance for loan loss by portfolio segment.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="fmnb_ScheduleOfAllowanceForLoanLossByPortfolioSegmentTableTextBlock" xlink:to="fmnb_ScheduleOfAllowanceForLoanLossByPortfolioSegmentTableTextBlock_lbl" />
    <link:label xml:lang="en-US" xlink:label="fmnb_ScheduleOfAllowanceForLoanLossByPortfolioSegmentTableTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Activity in the Allowance for Loan Losses by Portfolio Segment</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_ScheduleOfAllowanceForLoanLossByPortfolioSegmentTableTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Schedule Of Allowance For Loan Loss By Portfolio Segment Table [Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AllowanceForCreditLossesOnFinancingReceivablesTableTextBlock" xlink:type="locator" xlink:label="us-gaap_AllowanceForCreditLossesOnFinancingReceivablesTableTextBlock" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_AllowanceForCreditLossesOnFinancingReceivablesTableTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Allowance for Loan Losses and Recorded Investment in Loans by Portfolio Segment, Based on Impairment Method</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AllowanceForCreditLossesOnFinancingReceivablesTableTextBlock" xlink:to="us-gaap_AllowanceForCreditLossesOnFinancingReceivablesTableTextBlock_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_AllowanceForCreditLossesOnFinancingReceivablesTableTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Allowance For Credit Losses On Financing Receivables Table [Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ImpairedFinancingReceivablesTableTextBlock" xlink:type="locator" xlink:label="us-gaap_ImpairedFinancingReceivablesTableTextBlock" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ImpairedFinancingReceivablesTableTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Loans Individually Evaluated for Impairment by Class of Loans</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ImpairedFinancingReceivablesTableTextBlock" xlink:to="us-gaap_ImpairedFinancingReceivablesTableTextBlock_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ImpairedFinancingReceivablesTableTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Impaired Financing Receivables Table [Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ScheduleOfFinancingReceivablesNonAccrualStatusTableTextBlock" xlink:type="locator" xlink:label="us-gaap_ScheduleOfFinancingReceivablesNonAccrualStatusTableTextBlock" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ScheduleOfFinancingReceivablesNonAccrualStatusTableTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Investment in Nonaccrual and Loans Past Due 90 Days or More Still on Accrual by Class of Loans</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfFinancingReceivablesNonAccrualStatusTableTextBlock" xlink:to="us-gaap_ScheduleOfFinancingReceivablesNonAccrualStatusTableTextBlock_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ScheduleOfFinancingReceivablesNonAccrualStatusTableTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Schedule Of Financing Receivables Non Accrual Status Table [Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PastDueFinancingReceivablesTableTextBlock" xlink:type="locator" xlink:label="us-gaap_PastDueFinancingReceivablesTableTextBlock" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_PastDueFinancingReceivablesTableTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Investment in Past Due Loans</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PastDueFinancingReceivablesTableTextBlock" xlink:to="us-gaap_PastDueFinancingReceivablesTableTextBlock_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_PastDueFinancingReceivablesTableTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Past Due Financing Receivables Table [Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_TroubledDebtRestructuringsOnFinancingReceivablesTableTextBlock" xlink:type="locator" xlink:label="us-gaap_TroubledDebtRestructuringsOnFinancingReceivablesTableTextBlock" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_TroubledDebtRestructuringsOnFinancingReceivablesTableTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Loans By Class Modified as Troubled Debt Restructurings</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_TroubledDebtRestructuringsOnFinancingReceivablesTableTextBlock" xlink:to="us-gaap_TroubledDebtRestructuringsOnFinancingReceivablesTableTextBlock_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_TroubledDebtRestructuringsOnFinancingReceivablesTableTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Troubled Debt Restructurings On Financing Receivables Table [Text Block]</link:label>
    <link:loc xlink:href="fmnb-20201231.xsd#fmnb_PaymentDeferralsByLoanTypeOnFinancingReceivablesTableTextBlock" xlink:type="locator" xlink:label="fmnb_PaymentDeferralsByLoanTypeOnFinancingReceivablesTableTextBlock" />
    <link:label xml:lang="en-US" xlink:label="fmnb_PaymentDeferralsByLoanTypeOnFinancingReceivablesTableTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Payment deferrals by loan type on financing receivables.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="fmnb_PaymentDeferralsByLoanTypeOnFinancingReceivablesTableTextBlock" xlink:to="fmnb_PaymentDeferralsByLoanTypeOnFinancingReceivablesTableTextBlock_lbl" />
    <link:label xml:lang="en-US" xlink:label="fmnb_PaymentDeferralsByLoanTypeOnFinancingReceivablesTableTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Number and Amount of Payment Deferrals by Loan Type</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_PaymentDeferralsByLoanTypeOnFinancingReceivablesTableTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Payment Deferrals By Loan Type On Financing Receivables Table [Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FinancingReceivableCreditQualityIndicatorsTableTextBlock" xlink:type="locator" xlink:label="us-gaap_FinancingReceivableCreditQualityIndicatorsTableTextBlock" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FinancingReceivableCreditQualityIndicatorsTableTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Risk Category of Loans by Class of Loans</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FinancingReceivableCreditQualityIndicatorsTableTextBlock" xlink:to="us-gaap_FinancingReceivableCreditQualityIndicatorsTableTextBlock_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FinancingReceivableCreditQualityIndicatorsTableTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Financing Receivable Credit Quality Indicators Table [Text Block]</link:label>
    <link:loc xlink:href="fmnb-20201231.xsd#fmnb_InvestmentInResidentialConsumerAndIndirectAutoLoansBasedOnPaymentActivityTableTextBlock" xlink:type="locator" xlink:label="fmnb_InvestmentInResidentialConsumerAndIndirectAutoLoansBasedOnPaymentActivityTableTextBlock" />
    <link:label xml:lang="en-US" xlink:label="fmnb_InvestmentInResidentialConsumerAndIndirectAutoLoansBasedOnPaymentActivityTableTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Investment in residential, consumer and indirect auto loans based on payment activity.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="fmnb_InvestmentInResidentialConsumerAndIndirectAutoLoansBasedOnPaymentActivityTableTextBlock" xlink:to="fmnb_InvestmentInResidentialConsumerAndIndirectAutoLoansBasedOnPaymentActivityTableTextBlock_lbl" />
    <link:label xml:lang="en-US" xlink:label="fmnb_InvestmentInResidentialConsumerAndIndirectAutoLoansBasedOnPaymentActivityTableTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Investment in Residential, Consumer and Indirect Auto Loans Based on Payment Activity</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_InvestmentInResidentialConsumerAndIndirectAutoLoansBasedOnPaymentActivityTableTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Investment In Residential Consumer And Indirect Auto Loans Based On Payment Activity Table [Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DisaggregationOfRevenueTableTextBlock" xlink:type="locator" xlink:label="us-gaap_DisaggregationOfRevenueTableTextBlock" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DisaggregationOfRevenueTableTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Summary of Noninterest Income by Revenue Stream and Reportable Segment, Net of Eliminations</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DisaggregationOfRevenueTableTextBlock" xlink:to="us-gaap_DisaggregationOfRevenueTableTextBlock_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DisaggregationOfRevenueTableTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Disaggregation Of Revenue Table [Text Block]</link:label>
    <link:loc xlink:href="fmnb-20201231.xsd#fmnb_MortgageLoansPortfoliosServicedTableTextBlock" xlink:type="locator" xlink:label="fmnb_MortgageLoansPortfoliosServicedTableTextBlock" />
    <link:label xml:lang="en-US" xlink:label="fmnb_MortgageLoansPortfoliosServicedTableTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Mortgage loans portfolios serviced table text block.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="fmnb_MortgageLoansPortfoliosServicedTableTextBlock" xlink:to="fmnb_MortgageLoansPortfoliosServicedTableTextBlock_lbl" />
    <link:label xml:lang="en-US" xlink:label="fmnb_MortgageLoansPortfoliosServicedTableTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Summary of Principal Balance for Mortgage Loans</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_MortgageLoansPortfoliosServicedTableTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Mortgage Loans Portfolios Serviced Table [Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ScheduleOfServicingAssetsAtAmortizedValueTextBlock" xlink:type="locator" xlink:label="us-gaap_ScheduleOfServicingAssetsAtAmortizedValueTextBlock" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ScheduleOfServicingAssetsAtAmortizedValueTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Summary of Activity for Mortgage Servicing Rights</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfServicingAssetsAtAmortizedValueTextBlock" xlink:to="us-gaap_ScheduleOfServicingAssetsAtAmortizedValueTextBlock_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ScheduleOfServicingAssetsAtAmortizedValueTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Schedule Of Servicing Assets At Amortized Value [Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FairValueAssetsMeasuredOnRecurringBasisTextBlock" xlink:type="locator" xlink:label="us-gaap_FairValueAssetsMeasuredOnRecurringBasisTextBlock" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FairValueAssetsMeasuredOnRecurringBasisTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Assets Measured at Fair Value on Recurring Basis</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueAssetsMeasuredOnRecurringBasisTextBlock" xlink:to="us-gaap_FairValueAssetsMeasuredOnRecurringBasisTextBlock_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FairValueAssetsMeasuredOnRecurringBasisTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value Assets Measured On Recurring Basis [Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationTextBlock" xlink:type="locator" xlink:label="us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationTextBlock" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Reconciliation of All Assets Measured at Fair Value on Recurring Basis Using Significant Unobservable Inputs</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationTextBlock" xlink:to="us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationTextBlock_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FairValueAssetsMeasuredOnNonrecurringBasisTextBlock" xlink:type="locator" xlink:label="us-gaap_FairValueAssetsMeasuredOnNonrecurringBasisTextBlock" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FairValueAssetsMeasuredOnNonrecurringBasisTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Assets Measured at Fair Value on Non-Recurring Basis</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueAssetsMeasuredOnNonrecurringBasisTextBlock" xlink:to="us-gaap_FairValueAssetsMeasuredOnNonrecurringBasisTextBlock_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FairValueAssetsMeasuredOnNonrecurringBasisTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value Assets Measured On Nonrecurring Basis [Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FairValueAssetsMeasuredOnNonrecurringBasisValuationTechniquesTextBlock" xlink:type="locator" xlink:label="us-gaap_FairValueAssetsMeasuredOnNonrecurringBasisValuationTechniquesTextBlock" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FairValueAssetsMeasuredOnNonrecurringBasisValuationTechniquesTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Fair Value Measurements for Financial Instruments</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueAssetsMeasuredOnNonrecurringBasisValuationTechniquesTextBlock" xlink:to="us-gaap_FairValueAssetsMeasuredOnNonrecurringBasisValuationTechniquesTextBlock_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FairValueAssetsMeasuredOnNonrecurringBasisValuationTechniquesTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value Assets Measured On Nonrecurring Basis Valuation Techniques [Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FairValueByBalanceSheetGroupingTextBlock" xlink:type="locator" xlink:label="us-gaap_FairValueByBalanceSheetGroupingTextBlock" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FairValueByBalanceSheetGroupingTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Carrying Amounts and Estimated Fair Values of Financial Instruments</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueByBalanceSheetGroupingTextBlock" xlink:to="us-gaap_FairValueByBalanceSheetGroupingTextBlock_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FairValueByBalanceSheetGroupingTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value By Balance Sheet Grouping [Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PropertyPlantAndEquipmentTextBlock" xlink:type="locator" xlink:label="us-gaap_PropertyPlantAndEquipmentTextBlock" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_PropertyPlantAndEquipmentTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Premises and Equipment</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PropertyPlantAndEquipmentTextBlock" xlink:to="us-gaap_PropertyPlantAndEquipmentTextBlock_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_PropertyPlantAndEquipmentTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Property Plant And Equipment [Text Block]</link:label>
    <link:loc xlink:href="fmnb-20201231.xsd#fmnb_ScheduleOfPremisesAndEquipmentSubjectToLeaseAgreementsTableTextBlock" xlink:type="locator" xlink:label="fmnb_ScheduleOfPremisesAndEquipmentSubjectToLeaseAgreementsTableTextBlock" />
    <link:label xml:lang="en-US" xlink:label="fmnb_ScheduleOfPremisesAndEquipmentSubjectToLeaseAgreementsTableTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Schedule of premises and equipment subject to lease agreements.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="fmnb_ScheduleOfPremisesAndEquipmentSubjectToLeaseAgreementsTableTextBlock" xlink:to="fmnb_ScheduleOfPremisesAndEquipmentSubjectToLeaseAgreementsTableTextBlock_lbl" />
    <link:label xml:lang="en-US" xlink:label="fmnb_ScheduleOfPremisesAndEquipmentSubjectToLeaseAgreementsTableTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Premises and Equipment Subject to Lease Agreements</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_ScheduleOfPremisesAndEquipmentSubjectToLeaseAgreementsTableTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Schedule Of Premises And Equipment Subject To Lease Agreements Table [Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LesseeOperatingLeaseLiabilityMaturityTableTextBlock" xlink:type="locator" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityMaturityTableTextBlock" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityMaturityTableTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Maturities of Lease Liabilities</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LesseeOperatingLeaseLiabilityMaturityTableTextBlock" xlink:to="us-gaap_LesseeOperatingLeaseLiabilityMaturityTableTextBlock_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityMaturityTableTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Lessee Operating Lease Liability Maturity Table [Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTableTextBlock" xlink:type="locator" xlink:label="us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTableTextBlock" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTableTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Acquired Intangible Assets</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTableTextBlock" xlink:to="us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTableTextBlock_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTableTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Schedule Of Finite Lived Intangible Assets Table [Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ScheduleofFiniteLivedIntangibleAssetsFutureAmortizationExpenseTableTextBlock" xlink:type="locator" xlink:label="us-gaap_ScheduleofFiniteLivedIntangibleAssetsFutureAmortizationExpenseTableTextBlock" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ScheduleofFiniteLivedIntangibleAssetsFutureAmortizationExpenseTableTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Estimated Amortization Expense</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_ScheduleofFiniteLivedIntangibleAssetsFutureAmortizationExpenseTableTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Scheduleof Finite Lived Intangible Assets Future Amortization Expense Table [Text Block]</link:label>
    <link:loc xlink:href="fmnb-20201231.xsd#fmnb_TimeDepositsByMaturityTableTextBlock" xlink:type="locator" xlink:label="fmnb_TimeDepositsByMaturityTableTextBlock" />
    <link:label xml:lang="en-US" xlink:label="fmnb_TimeDepositsByMaturityTableTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Time deposits by maturity.</link:label>
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    <link:loc xlink:href="fmnb-20201231.xsd#fmnb_ScheduleOfInterestBearingDepositsTableTextBlock" xlink:type="locator" xlink:label="fmnb_ScheduleOfInterestBearingDepositsTableTextBlock" />
    <link:label xml:lang="en-US" xlink:label="fmnb_ScheduleOfInterestBearingDepositsTableTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Schedule of interest bearing deposits.</link:label>
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    <link:label xml:lang="en-US" xlink:label="fmnb_ScheduleOfInterestBearingDepositsTableTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Schedule Of Interest Bearing Deposits Table [Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CollateralAxis" xlink:type="locator" xlink:label="us-gaap_CollateralAxis" />
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    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CollateralAxis" xlink:to="us-gaap_CollateralAxis_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_CollateralAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Collateral [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CollateralDomain" xlink:type="locator" xlink:label="us-gaap_CollateralDomain" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_CollateralDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Collateral Held</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CollateralDomain" xlink:to="us-gaap_CollateralDomain_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_CollateralDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Collateral [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CollateralPledgedMember" xlink:type="locator" xlink:label="us-gaap_CollateralPledgedMember" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_CollateralPledgedMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Pledged</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CollateralPledgedMember" xlink:to="us-gaap_CollateralPledgedMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_CollateralPledgedMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Collateral Pledged [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FederalHomeLoanBankAdvancesTableTextBlock" xlink:type="locator" xlink:label="us-gaap_FederalHomeLoanBankAdvancesTableTextBlock" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FederalHomeLoanBankAdvancesTableTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Summary of Long-term Advances from the Federal Home Loan Bank</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FederalHomeLoanBankAdvancesTableTextBlock" xlink:to="us-gaap_FederalHomeLoanBankAdvancesTableTextBlock_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FederalHomeLoanBankAdvancesTableTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Federal Home Loan Bank Advances Table [Text Block]</link:label>
    <link:loc xlink:href="fmnb-20201231.xsd#fmnb_SummaryOfSecuritiesSoldUnderAgreementsToRepurchaseTableTextBlock" xlink:type="locator" xlink:label="fmnb_SummaryOfSecuritiesSoldUnderAgreementsToRepurchaseTableTextBlock" />
    <link:label xml:lang="en-US" xlink:label="fmnb_SummaryOfSecuritiesSoldUnderAgreementsToRepurchaseTableTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Summary of securities sold under agreements to repurchase.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="fmnb_SummaryOfSecuritiesSoldUnderAgreementsToRepurchaseTableTextBlock" xlink:to="fmnb_SummaryOfSecuritiesSoldUnderAgreementsToRepurchaseTableTextBlock_lbl" />
    <link:label xml:lang="en-US" xlink:label="fmnb_SummaryOfSecuritiesSoldUnderAgreementsToRepurchaseTableTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Summary of Securities Sold under Agreements to Repurchase</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_SummaryOfSecuritiesSoldUnderAgreementsToRepurchaseTableTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Summary Of Securities Sold Under Agreements To Repurchase Table [Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ScheduleOfRepurchaseAgreements" xlink:type="locator" xlink:label="us-gaap_ScheduleOfRepurchaseAgreements" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ScheduleOfRepurchaseAgreements_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule Disaggregation of the Obligation by the Class of Collateral Pledged for Short-Term Financing Obtained Through the Sales of Repurchase Agreements</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_ScheduleOfRepurchaseAgreements_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Schedule Of Repurchase Agreements</link:label>
    <link:loc xlink:href="fmnb-20201231.xsd#fmnb_ScheduleOfFederalHomeLoanBankAdvancesMaturitiesTableTextBlock" xlink:type="locator" xlink:label="fmnb_ScheduleOfFederalHomeLoanBankAdvancesMaturitiesTableTextBlock" />
    <link:label xml:lang="en-US" xlink:label="fmnb_ScheduleOfFederalHomeLoanBankAdvancesMaturitiesTableTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Schedule of federal home loan bank advances maturities.</link:label>
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    <link:label xml:lang="en-US" xlink:label="fmnb_ScheduleOfFederalHomeLoanBankAdvancesMaturitiesTableTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Scheduled Payments of Long-term Federal Home Loan Bank Advances</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_ScheduleOfFederalHomeLoanBankAdvancesMaturitiesTableTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Schedule Of Federal Home Loan Bank Advances Maturities Table [Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ScheduleOfFairValueOffBalanceSheetRisksTextBlock" xlink:type="locator" xlink:label="us-gaap_ScheduleOfFairValueOffBalanceSheetRisksTextBlock" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ScheduleOfFairValueOffBalanceSheetRisksTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">The Contractual Amounts of Financial Instruments with Off-Balance-Sheet Risk at Year End</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfFairValueOffBalanceSheetRisksTextBlock" xlink:to="us-gaap_ScheduleOfFairValueOffBalanceSheetRisksTextBlock_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ScheduleOfFairValueOffBalanceSheetRisksTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Schedule Of Fair Value Off Balance Sheet Risks [Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ScheduleOfShareBasedCompensationRestrictedStockUnitsAwardActivityTableTextBlock" xlink:type="locator" xlink:label="us-gaap_ScheduleOfShareBasedCompensationRestrictedStockUnitsAwardActivityTableTextBlock" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ScheduleOfShareBasedCompensationRestrictedStockUnitsAwardActivityTableTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Summary of Award Activity under Plan</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfShareBasedCompensationRestrictedStockUnitsAwardActivityTableTextBlock" xlink:to="us-gaap_ScheduleOfShareBasedCompensationRestrictedStockUnitsAwardActivityTableTextBlock_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ScheduleOfShareBasedCompensationRestrictedStockUnitsAwardActivityTableTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Schedule Of Share Based Compensation Restricted Stock Units Award Activity Table [Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ScheduleOfComplianceWithRegulatoryCapitalRequirementsUnderBankingRegulationsTextBlock" xlink:type="locator" xlink:label="us-gaap_ScheduleOfComplianceWithRegulatoryCapitalRequirementsUnderBankingRegulationsTextBlock" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ScheduleOfComplianceWithRegulatoryCapitalRequirementsUnderBankingRegulationsTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Actual and Required Capital Amounts (Not Including Capital Conservation Buffer) and Ratios</link:label>
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ScheduleOfComponentsOfIncomeTaxExpenseBenefitTableTextBlock" xlink:type="locator" xlink:label="us-gaap_ScheduleOfComponentsOfIncomeTaxExpenseBenefitTableTextBlock" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ScheduleOfComponentsOfIncomeTaxExpenseBenefitTableTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Provision for Income Taxes (Credit)</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_ScheduleOfComponentsOfIncomeTaxExpenseBenefitTableTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Schedule Of Components Of Income Tax Expense Benefit Table [Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ScheduleOfEffectiveIncomeTaxRateReconciliationTableTextBlock" xlink:type="locator" xlink:label="us-gaap_ScheduleOfEffectiveIncomeTaxRateReconciliationTableTextBlock" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ScheduleOfEffectiveIncomeTaxRateReconciliationTableTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Effective Tax Rates Differ from Federal Statutory Rate</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_ScheduleOfEffectiveIncomeTaxRateReconciliationTableTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Schedule Of Effective Income Tax Rate Reconciliation Table [Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ScheduleOfDeferredTaxAssetsAndLiabilitiesTableTextBlock" xlink:type="locator" xlink:label="us-gaap_ScheduleOfDeferredTaxAssetsAndLiabilitiesTableTextBlock" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ScheduleOfDeferredTaxAssetsAndLiabilitiesTableTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Deferred Tax Assets (Liabilities)</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_ScheduleOfDeferredTaxAssetsAndLiabilitiesTableTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Schedule Of Deferred Tax Assets And Liabilities Table [Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ScheduleOfComprehensiveIncomeLossTableTextBlock" xlink:type="locator" xlink:label="us-gaap_ScheduleOfComprehensiveIncomeLossTableTextBlock" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ScheduleOfComprehensiveIncomeLossTableTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Other Comprehensive Income (Loss)</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_ScheduleOfComprehensiveIncomeLossTableTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Schedule Of Comprehensive Income Loss Table [Text Block]</link:label>
    <link:loc xlink:href="fmnb-20201231.xsd#fmnb_ScheduleOfLoansAndLeasesReceivableRelatedPartiesTableTextBlock" xlink:type="locator" xlink:label="fmnb_ScheduleOfLoansAndLeasesReceivableRelatedPartiesTableTextBlock" />
    <link:label xml:lang="en-US" xlink:label="fmnb_ScheduleOfLoansAndLeasesReceivableRelatedPartiesTableTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Schedule of loans and leases receivable related parties.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="fmnb_ScheduleOfLoansAndLeasesReceivableRelatedPartiesTableTextBlock" xlink:to="fmnb_ScheduleOfLoansAndLeasesReceivableRelatedPartiesTableTextBlock_lbl" />
    <link:label xml:lang="en-US" xlink:label="fmnb_ScheduleOfLoansAndLeasesReceivableRelatedPartiesTableTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Loans to Principal Officers, Directors, and Their Affiliates</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_ScheduleOfLoansAndLeasesReceivableRelatedPartiesTableTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Schedule Of Loans And Leases Receivable Related Parties Table [Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ScheduleOfEarningsPerShareBasicAndDilutedTableTextBlock" xlink:type="locator" xlink:label="us-gaap_ScheduleOfEarningsPerShareBasicAndDilutedTableTextBlock" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ScheduleOfEarningsPerShareBasicAndDilutedTableTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Computation of Basic and Diluted Earnings Per Share</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_ScheduleOfEarningsPerShareBasicAndDilutedTableTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Schedule Of Earnings Per Share Basic And Diluted Table [Text Block]</link:label>
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    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfInterestRateDerivativesTableTextBlock" xlink:to="us-gaap_ScheduleOfInterestRateDerivativesTableTextBlock_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ScheduleOfInterestRateDerivativesTableTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Schedule Of Interest Rate Derivatives Table [Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ScheduleOfSegmentReportingInformationBySegmentTextBlock" xlink:type="locator" xlink:label="us-gaap_ScheduleOfSegmentReportingInformationBySegmentTextBlock" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ScheduleOfSegmentReportingInformationBySegmentTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Segment Reporting Information</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfSegmentReportingInformationBySegmentTextBlock" xlink:to="us-gaap_ScheduleOfSegmentReportingInformationBySegmentTextBlock_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ScheduleOfSegmentReportingInformationBySegmentTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Schedule Of Segment Reporting Information By Segment [Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ScheduleOfQuarterlyFinancialInformationTableTextBlock" xlink:type="locator" xlink:label="us-gaap_ScheduleOfQuarterlyFinancialInformationTableTextBlock" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ScheduleOfQuarterlyFinancialInformationTableTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Quarterly Financial Data (Unaudited)</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfQuarterlyFinancialInformationTableTextBlock" xlink:to="us-gaap_ScheduleOfQuarterlyFinancialInformationTableTextBlock_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ScheduleOfQuarterlyFinancialInformationTableTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Schedule Of Quarterly Financial Information Table [Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_ScheduleOfCondensedFinancialStatementsTableTextBlock" xlink:type="locator" xlink:label="srt_ScheduleOfCondensedFinancialStatementsTableTextBlock" />
    <link:label xml:lang="en-US" xlink:label="srt_ScheduleOfCondensedFinancialStatementsTableTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Parent Company Only Condensed Financial Information</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="srt_ScheduleOfCondensedFinancialStatementsTableTextBlock" xlink:to="srt_ScheduleOfCondensedFinancialStatementsTableTextBlock_lbl" />
    <link:label xml:lang="en-US" xlink:label="srt_ScheduleOfCondensedFinancialStatementsTableTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Schedule Of Condensed Financial Statements Table [Text Block]</link:label>
    <link:loc xlink:href="fmnb-20201231.xsd#fmnb_SummaryOfSignificantAccountingPoliciesAdditionalTextualAbstract" xlink:type="locator" xlink:label="fmnb_SummaryOfSignificantAccountingPoliciesAdditionalTextualAbstract" />
    <link:label xml:lang="en-US" xlink:label="fmnb_SummaryOfSignificantAccountingPoliciesAdditionalTextualAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Summary of significant accounting policies additional textual.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="fmnb_SummaryOfSignificantAccountingPoliciesAdditionalTextualAbstract" xlink:to="fmnb_SummaryOfSignificantAccountingPoliciesAdditionalTextualAbstract_lbl" />
    <link:loc xlink:href="fmnb-20201231.xsd#fmnb_SummaryOfSignificantAccountingPoliciesLineItems" xlink:type="locator" xlink:label="fmnb_SummaryOfSignificantAccountingPoliciesLineItems" />
    <link:label xml:lang="en-US" xlink:label="fmnb_SummaryOfSignificantAccountingPoliciesLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Summary of significant accounting policies.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="fmnb_SummaryOfSignificantAccountingPoliciesLineItems" xlink:to="fmnb_SummaryOfSignificantAccountingPoliciesLineItems_lbl" />
    <link:loc xlink:href="fmnb-20201231.xsd#fmnb_SummaryOfSignificantAccountingPoliciesTable" xlink:type="locator" xlink:label="fmnb_SummaryOfSignificantAccountingPoliciesTable" />
    <link:label xml:lang="en-US" xlink:label="fmnb_SummaryOfSignificantAccountingPoliciesTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Summary of significant accounting policies.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="fmnb_SummaryOfSignificantAccountingPoliciesTable" xlink:to="fmnb_SummaryOfSignificantAccountingPoliciesTable_lbl" />
    <link:label xml:lang="en-US" xlink:label="fmnb_SummaryOfSignificantAccountingPoliciesTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Summary Of Significant Accounting Policies [Table]</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_SummaryOfSignificantAccountingPoliciesTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Summary Of Significant Accounting Policies [Table]</link:label>
    <link:loc xlink:href="fmnb-20201231.xsd#fmnb_NationalAssociatesIncorporatedMember" xlink:type="locator" xlink:label="fmnb_NationalAssociatesIncorporatedMember" />
    <link:label xml:lang="en-US" xlink:label="fmnb_NationalAssociatesIncorporatedMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">National associates incorporated.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="fmnb_NationalAssociatesIncorporatedMember" xlink:to="fmnb_NationalAssociatesIncorporatedMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="fmnb_NationalAssociatesIncorporatedMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">NAI</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_NationalAssociatesIncorporatedMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">National Associates Incorporated [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_StatementGeographicalAxis" xlink:type="locator" xlink:label="srt_StatementGeographicalAxis" />
    <link:label xml:lang="en-US" xlink:label="srt_StatementGeographicalAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Geographical</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="srt_StatementGeographicalAxis" xlink:to="srt_StatementGeographicalAxis_lbl" />
    <link:label xml:lang="en-US" xlink:label="srt_StatementGeographicalAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Statement Geographical [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_SegmentGeographicalDomain" xlink:type="locator" xlink:label="srt_SegmentGeographicalDomain" />
    <link:label xml:lang="en-US" xlink:label="srt_SegmentGeographicalDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Geographical</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="srt_SegmentGeographicalDomain" xlink:to="srt_SegmentGeographicalDomain_lbl" />
    <link:label xml:lang="en-US" xlink:label="srt_SegmentGeographicalDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Segment Geographical [Domain]</link:label>
    <link:loc xlink:href="fmnb-20201231.xsd#fmnb_SouthwesternPennsylvaniaMember" xlink:type="locator" xlink:label="fmnb_SouthwesternPennsylvaniaMember" />
    <link:label xml:lang="en-US" xlink:label="fmnb_SouthwesternPennsylvaniaMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Southwestern Pennsylvania.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="fmnb_SouthwesternPennsylvaniaMember" xlink:to="fmnb_SouthwesternPennsylvaniaMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="fmnb_SouthwesternPennsylvaniaMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Southwestern Pennsylvania</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_SouthwesternPennsylvaniaMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Southwestern Pennsylvania [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FinancingReceivablePortfolioSegmentAxis" xlink:type="locator" xlink:label="us-gaap_FinancingReceivablePortfolioSegmentAxis" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FinancingReceivablePortfolioSegmentAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Financing Receivable Portfolio Segment</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FinancingReceivablePortfolioSegmentAxis" xlink:to="us-gaap_FinancingReceivablePortfolioSegmentAxis_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FinancingReceivablePortfolioSegmentAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Financing Receivable Portfolio Segment [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FinancingReceivablePortfolioSegmentDomain" xlink:type="locator" xlink:label="us-gaap_FinancingReceivablePortfolioSegmentDomain" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FinancingReceivablePortfolioSegmentDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Financing Receivable Portfolio Segment</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FinancingReceivablePortfolioSegmentDomain" xlink:to="us-gaap_FinancingReceivablePortfolioSegmentDomain_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FinancingReceivablePortfolioSegmentDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Financing Receivable Portfolio Segment [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ResidentialPortfolioSegmentMember" xlink:type="locator" xlink:label="us-gaap_ResidentialPortfolioSegmentMember" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ResidentialPortfolioSegmentMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Residential Real Estate</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ResidentialPortfolioSegmentMember" xlink:to="us-gaap_ResidentialPortfolioSegmentMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ResidentialPortfolioSegmentMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Residential Portfolio Segment [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FinancialInstrumentAxis" xlink:type="locator" xlink:label="us-gaap_FinancialInstrumentAxis" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FinancialInstrumentAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Financial Instrument</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FinancialInstrumentAxis" xlink:to="us-gaap_FinancialInstrumentAxis_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FinancialInstrumentAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Financial Instrument [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain" xlink:type="locator" xlink:label="us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Financial Instruments</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain" xlink:to="us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Transfers And Servicing Of Financial Instruments Types Of Financial Instruments [Domain]</link:label>
    <link:loc xlink:href="fmnb-20201231.xsd#fmnb_MortgageServicingRightsMember" xlink:type="locator" xlink:label="fmnb_MortgageServicingRightsMember" />
    <link:label xml:lang="en-US" xlink:label="fmnb_MortgageServicingRightsMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Mortgage servicing rights.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="fmnb_MortgageServicingRightsMember" xlink:to="fmnb_MortgageServicingRightsMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="fmnb_MortgageServicingRightsMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Mortgage Servicing Rights</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_MortgageServicingRightsMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Mortgage Servicing Rights [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PropertyPlantAndEquipmentByTypeAxis" xlink:type="locator" xlink:label="us-gaap_PropertyPlantAndEquipmentByTypeAxis" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_PropertyPlantAndEquipmentByTypeAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Long-Lived Tangible Asset</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PropertyPlantAndEquipmentByTypeAxis" xlink:to="us-gaap_PropertyPlantAndEquipmentByTypeAxis_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_PropertyPlantAndEquipmentByTypeAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Property Plant And Equipment By Type [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain" xlink:type="locator" xlink:label="us-gaap_PropertyPlantAndEquipmentTypeDomain" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_PropertyPlantAndEquipmentTypeDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Long-Lived Tangible Asset</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PropertyPlantAndEquipmentTypeDomain" xlink:to="us-gaap_PropertyPlantAndEquipmentTypeDomain_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_PropertyPlantAndEquipmentTypeDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Property Plant And Equipment Type [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_BuildingMember" xlink:type="locator" xlink:label="us-gaap_BuildingMember" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_BuildingMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Buildings</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_BuildingMember" xlink:to="us-gaap_BuildingMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_BuildingMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Building [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FurnitureAndFixturesMember" xlink:type="locator" xlink:label="us-gaap_FurnitureAndFixturesMember" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FurnitureAndFixturesMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Furniture Fixtures and Equipment</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FurnitureAndFixturesMember" xlink:to="us-gaap_FurnitureAndFixturesMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FurnitureAndFixturesMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Furniture And Fixtures [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_RangeAxis" xlink:type="locator" xlink:label="srt_RangeAxis" />
    <link:label xml:lang="en-US" xlink:label="srt_RangeAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Statistical Measurement</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="srt_RangeAxis" xlink:to="srt_RangeAxis_lbl" />
    <link:label xml:lang="en-US" xlink:label="srt_RangeAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Range [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_RangeMember" xlink:type="locator" xlink:label="srt_RangeMember" />
    <link:label xml:lang="en-US" xlink:label="srt_RangeMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Statistical Measurement</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="srt_RangeMember" xlink:to="srt_RangeMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="srt_RangeMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Range [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_MinimumMember" xlink:type="locator" xlink:label="srt_MinimumMember" />
    <link:label xml:lang="en-US" xlink:label="srt_MinimumMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Minimum</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="srt_MinimumMember" xlink:to="srt_MinimumMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="srt_MinimumMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Minimum [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_MaximumMember" xlink:type="locator" xlink:label="srt_MaximumMember" />
    <link:label xml:lang="en-US" xlink:label="srt_MaximumMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Maximum [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="srt_MaximumMember" xlink:to="srt_MaximumMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="srt_MaximumMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Maximum [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis" xlink:type="locator" xlink:label="us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Finite-Lived Intangible Assets by Major Class</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis" xlink:to="us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Finite Lived Intangible Assets By Major Class [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain" xlink:type="locator" xlink:label="us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Finite-Lived Intangible Assets, Major Class Name</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain" xlink:to="us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Finite Lived Intangible Assets Major Class Name [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CoreDepositsMember" xlink:type="locator" xlink:label="us-gaap_CoreDepositsMember" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_CoreDepositsMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Core Deposits</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CoreDepositsMember" xlink:to="us-gaap_CoreDepositsMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_CoreDepositsMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Core Deposits [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CustomerRelationshipsMember" xlink:type="locator" xlink:label="us-gaap_CustomerRelationshipsMember" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_CustomerRelationshipsMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Customer Relationships</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CustomerRelationshipsMember" xlink:to="us-gaap_CustomerRelationshipsMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_CustomerRelationshipsMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Customer Relationships [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="srt_MaximumMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Maximum</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AdjustmentsForNewAccountingPronouncementsAxis" xlink:type="locator" xlink:label="us-gaap_AdjustmentsForNewAccountingPronouncementsAxis" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_AdjustmentsForNewAccountingPronouncementsAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accounting Standards Update</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AdjustmentsForNewAccountingPronouncementsAxis" xlink:to="us-gaap_AdjustmentsForNewAccountingPronouncementsAxis_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_AdjustmentsForNewAccountingPronouncementsAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Adjustments For New Accounting Pronouncements [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_TypeOfAdoptionMember" xlink:type="locator" xlink:label="us-gaap_TypeOfAdoptionMember" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_TypeOfAdoptionMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accounting Standards Update</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_TypeOfAdoptionMember" xlink:to="us-gaap_TypeOfAdoptionMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_TypeOfAdoptionMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Type Of Adoption [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AccountingStandardsUpdate201704Member" xlink:type="locator" xlink:label="us-gaap_AccountingStandardsUpdate201704Member" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_AccountingStandardsUpdate201704Member_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">ASU 2017-04</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AccountingStandardsUpdate201704Member" xlink:to="us-gaap_AccountingStandardsUpdate201704Member_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_AccountingStandardsUpdate201704Member_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Accounting Standards Update201704 [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AccountingStandardsUpdate201613Member" xlink:type="locator" xlink:label="us-gaap_AccountingStandardsUpdate201613Member" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_AccountingStandardsUpdate201613Member_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">ASU 2016-13</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AccountingStandardsUpdate201613Member" xlink:to="us-gaap_AccountingStandardsUpdate201613Member_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_AccountingStandardsUpdate201613Member_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Accounting Standards Update201613 [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_SubsequentEventTypeAxis" xlink:type="locator" xlink:label="us-gaap_SubsequentEventTypeAxis" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_SubsequentEventTypeAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Subsequent Event Type</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SubsequentEventTypeAxis" xlink:to="us-gaap_SubsequentEventTypeAxis_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_SubsequentEventTypeAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Subsequent Event Type [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_SubsequentEventTypeDomain" xlink:type="locator" xlink:label="us-gaap_SubsequentEventTypeDomain" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_SubsequentEventTypeDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Subsequent Event Type</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SubsequentEventTypeDomain" xlink:to="us-gaap_SubsequentEventTypeDomain_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_SubsequentEventTypeDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Subsequent Event Type [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_SubsequentEventMember" xlink:type="locator" xlink:label="us-gaap_SubsequentEventMember" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_SubsequentEventMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Subsequent Event</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SubsequentEventMember" xlink:to="us-gaap_SubsequentEventMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_SubsequentEventMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Subsequent Event [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AccountingStandardsUpdate201602Member" xlink:type="locator" xlink:label="us-gaap_AccountingStandardsUpdate201602Member" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_AccountingStandardsUpdate201602Member_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">ASU 2016-02</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AccountingStandardsUpdate201602Member" xlink:to="us-gaap_AccountingStandardsUpdate201602Member_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_AccountingStandardsUpdate201602Member_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Accounting Standards Update201602 [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_SummaryOfSignificantAccountingPoliciesLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Summary Of Significant Accounting Policies [Line Items]</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_SummaryOfSignificantAccountingPoliciesLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Summary Of Significant Accounting Policies [Line Items]</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_SummaryOfSignificantAccountingPoliciesAdditionalTextualAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Summary of Significant Accounting Policies (Additional Textual) [Abstract]</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_SummaryOfSignificantAccountingPoliciesAdditionalTextualAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Summary Of Significant Accounting Policies Additional Textual [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_NumberOfReportingUnits" xlink:type="locator" xlink:label="us-gaap_NumberOfReportingUnits" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_NumberOfReportingUnits_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Number of reporting units</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NumberOfReportingUnits" xlink:to="us-gaap_NumberOfReportingUnits_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_NumberOfReportingUnits_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Number Of Reporting Units</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_NumberOfReportableSegments" xlink:type="locator" xlink:label="us-gaap_NumberOfReportableSegments" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_NumberOfReportableSegments_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Number of reportable segments</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NumberOfReportableSegments" xlink:to="us-gaap_NumberOfReportableSegments_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_NumberOfReportableSegments_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Number Of Reportable Segments</link:label>
    <link:loc xlink:href="fmnb-20201231.xsd#fmnb_NumberOfLocationsServedByBank" xlink:type="locator" xlink:label="fmnb_NumberOfLocationsServedByBank" />
    <link:label xml:lang="en-US" xlink:label="fmnb_NumberOfLocationsServedByBank_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Number of locations served by bank.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="fmnb_NumberOfLocationsServedByBank" xlink:to="fmnb_NumberOfLocationsServedByBank_lbl" />
    <link:label xml:lang="en-US" xlink:label="fmnb_NumberOfLocationsServedByBank_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Number of locations served by bank</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_NumberOfLocationsServedByBank_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Number Of Locations Served By Bank</link:label>
    <link:loc xlink:href="fmnb-20201231.xsd#fmnb_PeriodOfFederalFundPurchasedAndSold" xlink:type="locator" xlink:label="fmnb_PeriodOfFederalFundPurchasedAndSold" />
    <link:label xml:lang="en-US" xlink:label="fmnb_PeriodOfFederalFundPurchasedAndSold_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Period of federal fund purchased and sold.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="fmnb_PeriodOfFederalFundPurchasedAndSold" xlink:to="fmnb_PeriodOfFederalFundPurchasedAndSold_lbl" />
    <link:label xml:lang="en-US" xlink:label="fmnb_PeriodOfFederalFundPurchasedAndSold_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Purchased and sold period of federal fund</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_PeriodOfFederalFundPurchasedAndSold_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Period Of Federal Fund Purchased And Sold</link:label>
    <link:loc xlink:href="fmnb-20201231.xsd#fmnb_DelinquentPeriodOfLoansAfterWhichInterestIncomeIsDiscontinued" xlink:type="locator" xlink:label="fmnb_DelinquentPeriodOfLoansAfterWhichInterestIncomeIsDiscontinued" />
    <link:label xml:lang="en-US" xlink:label="fmnb_DelinquentPeriodOfLoansAfterWhichInterestIncomeIsDiscontinued_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Delinquent period of loans after which interest income is discontinued.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="fmnb_DelinquentPeriodOfLoansAfterWhichInterestIncomeIsDiscontinued" xlink:to="fmnb_DelinquentPeriodOfLoansAfterWhichInterestIncomeIsDiscontinued_lbl" />
    <link:label xml:lang="en-US" xlink:label="fmnb_DelinquentPeriodOfLoansAfterWhichInterestIncomeIsDiscontinued_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Delinquent period of loans after which interest income is discontinued</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_DelinquentPeriodOfLoansAfterWhichInterestIncomeIsDiscontinued_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Delinquent Period Of Loans After Which Interest Income Is Discontinued</link:label>
    <link:loc xlink:href="fmnb-20201231.xsd#fmnb_NumberOfCountyEconomyConsiderForCreditRiskPurpose" xlink:type="locator" xlink:label="fmnb_NumberOfCountyEconomyConsiderForCreditRiskPurpose" />
    <link:label xml:lang="en-US" xlink:label="fmnb_NumberOfCountyEconomyConsiderForCreditRiskPurpose_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Number of county economy consider for credit risk purpose.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="fmnb_NumberOfCountyEconomyConsiderForCreditRiskPurpose" xlink:to="fmnb_NumberOfCountyEconomyConsiderForCreditRiskPurpose_lbl" />
    <link:loc xlink:href="fmnb-20201231.xsd#fmnb_PercentageOfPortfolioLoansSecuredByRealEstate" xlink:type="locator" xlink:label="fmnb_PercentageOfPortfolioLoansSecuredByRealEstate" />
    <link:label xml:lang="en-US" xlink:label="fmnb_PercentageOfPortfolioLoansSecuredByRealEstate_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Percentage of portfolio loans secured by real estate.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="fmnb_PercentageOfPortfolioLoansSecuredByRealEstate" xlink:to="fmnb_PercentageOfPortfolioLoansSecuredByRealEstate_lbl" />
    <link:label xml:lang="en-US" xlink:label="fmnb_NumberOfCountyEconomyConsiderForCreditRiskPurpose_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Number of county economy from which credit risk exposure effected</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_NumberOfCountyEconomyConsiderForCreditRiskPurpose_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Number Of County Economy Consider For Credit Risk Purpose</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_PercentageOfPortfolioLoansSecuredByRealEstate_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Percentage of portfolio loans secured by real estate</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_PercentageOfPortfolioLoansSecuredByRealEstate_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Percentage Of Portfolio Loans Secured By Real Estate</link:label>
    <link:loc xlink:href="fmnb-20201231.xsd#fmnb_MinimumAmountOfCommercialAndCommercialRealEstateLoansOnWhichImpairmentToBeMade" xlink:type="locator" xlink:label="fmnb_MinimumAmountOfCommercialAndCommercialRealEstateLoansOnWhichImpairmentToBeMade" />
    <link:label xml:lang="en-US" xlink:label="fmnb_MinimumAmountOfCommercialAndCommercialRealEstateLoansOnWhichImpairmentToBeMade_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Minimum amount of commercial and commercial real estate loans on which impairment to be made.</link:label>
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    <link:loc xlink:href="fmnb-20201231.xsd#fmnb_MinimumAmountOfConsumerAndResidentialRealEstateLoansOnWhichImpairmentToBeMade" xlink:type="locator" xlink:label="fmnb_MinimumAmountOfConsumerAndResidentialRealEstateLoansOnWhichImpairmentToBeMade" />
    <link:label xml:lang="en-US" xlink:label="fmnb_MinimumAmountOfConsumerAndResidentialRealEstateLoansOnWhichImpairmentToBeMade_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Minimum amount of consumer and residential real estate loans on which impairment to be made.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="fmnb_MinimumAmountOfConsumerAndResidentialRealEstateLoansOnWhichImpairmentToBeMade" xlink:to="fmnb_MinimumAmountOfConsumerAndResidentialRealEstateLoansOnWhichImpairmentToBeMade_lbl" />
    <link:label xml:lang="en-US" xlink:label="fmnb_MinimumAmountOfCommercialAndCommercialRealEstateLoansOnWhichImpairmentToBeMade_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Impairment on commercial and commercial real estate loans, threshold amount</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_MinimumAmountOfCommercialAndCommercialRealEstateLoansOnWhichImpairmentToBeMade_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Minimum Amount Of Commercial And Commercial Real Estate Loans On Which Impairment To Be Made</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_MinimumAmountOfConsumerAndResidentialRealEstateLoansOnWhichImpairmentToBeMade_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Impairment on consumer and residential real estate loans, threshold amount</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_MinimumAmountOfConsumerAndResidentialRealEstateLoansOnWhichImpairmentToBeMade_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Minimum Amount Of Consumer And Residential Real Estate Loans On Which Impairment To Be Made</link:label>
    <link:loc xlink:href="fmnb-20201231.xsd#fmnb_MaximumLoanFinancingPeriod" xlink:type="locator" xlink:label="fmnb_MaximumLoanFinancingPeriod" />
    <link:label xml:lang="en-US" xlink:label="fmnb_MaximumLoanFinancingPeriod_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Maximum loan financing period.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="fmnb_MaximumLoanFinancingPeriod" xlink:to="fmnb_MaximumLoanFinancingPeriod_lbl" />
    <link:loc xlink:href="fmnb-20201231.xsd#fmnb_SummaryOfSignificantAccountingPoliciesTextualAbstract" xlink:type="locator" xlink:label="fmnb_SummaryOfSignificantAccountingPoliciesTextualAbstract" />
    <link:label xml:lang="en-US" xlink:label="fmnb_SummaryOfSignificantAccountingPoliciesTextualAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Summary of significant accounting policies.</link:label>
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    <link:label xml:lang="en-US" xlink:label="fmnb_BusinessCombinationRecognizedIdentifiableAssetsAcquiredSecuritiesAvailableForSale_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Securities available for sale</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_BusinessCombinationRecognizedIdentifiableAssetsAcquiredSecuritiesAvailableForSale_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Business Combination Recognized Identifiable Assets Acquired Securities Available For Sale</link:label>
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CorporateBondSecuritiesMember" xlink:type="locator" xlink:label="us-gaap_CorporateBondSecuritiesMember" />
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    <link:loc xlink:href="fmnb-20201231.xsd#fmnb_SmallBusinessAdministrationMember" xlink:type="locator" xlink:label="fmnb_SmallBusinessAdministrationMember" />
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_USTreasuryAndGovernmentMember" xlink:type="locator" xlink:label="us-gaap_USTreasuryAndGovernmentMember" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_USTreasuryAndGovernmentMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">U.S. Treasury and U.S. government sponsored entities</link:label>
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_USStatesAndPoliticalSubdivisionsMember" xlink:type="locator" xlink:label="us-gaap_USStatesAndPoliticalSubdivisionsMember" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_USStatesAndPoliticalSubdivisionsMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">State and political subdivisions</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_USStatesAndPoliticalSubdivisionsMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">U S States And Political Subdivisions [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ResidentialMortgageBackedSecuritiesMember" xlink:type="locator" xlink:label="us-gaap_ResidentialMortgageBackedSecuritiesMember" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ResidentialMortgageBackedSecuritiesMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Mortgage-backed securities - residential</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ResidentialMortgageBackedSecuritiesMember" xlink:to="us-gaap_ResidentialMortgageBackedSecuritiesMember_lbl" />
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CollateralizedMortgageObligationsMember" xlink:type="locator" xlink:label="us-gaap_CollateralizedMortgageObligationsMember" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_CollateralizedMortgageObligationsMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Collateralized mortgage obligations</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CollateralizedMortgageObligationsMember" xlink:to="us-gaap_CollateralizedMortgageObligationsMember_lbl" />
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems" xlink:type="locator" xlink:label="us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems" />
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis" xlink:type="locator" xlink:label="us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Amortized Cost</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Gross Unrealized Gains</link:label>
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    <link:loc xlink:href="https://xbrl.sec.gov/dei/2020/dei-2020-01-31.xsd#dei_LegalEntityAxis" xlink:type="locator" xlink:label="dei_LegalEntityAxis" />
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    <link:loc xlink:href="fmnb-20201231.xsd#fmnb_SmallBusinessInvestmentCompanyPartnershipInvestmentsMember" xlink:type="locator" xlink:label="fmnb_SmallBusinessInvestmentCompanyPartnershipInvestmentsMember" />
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    <link:loc xlink:href="fmnb-20201231.xsd#fmnb_LocalAndRegionalBankHoldingsAndOtherMiscellaneousEquityFundsMember" xlink:type="locator" xlink:label="fmnb_LocalAndRegionalBankHoldingsAndOtherMiscellaneousEquityFundsMember" />
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPosition" xlink:type="locator" xlink:label="us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPosition" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPosition_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Fair Value, Total</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPosition" xlink:to="us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPosition_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPosition_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Debt Securities Available For Sale Unrealized Loss Position</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss" xlink:type="locator" xlink:label="us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedTotalLabel">Unrealized Losses, Total</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss" xlink:to="us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Debt Securities Available For Sale Unrealized Loss Position Accumulated Loss</link:label>
    <link:label xml:lang="en-US" xlink:label="us-gaap_EquitySecuritiesFvNi_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Equity securities</link:label>
    <link:loc xlink:href="fmnb-20201231.xsd#fmnb_NumberOfSecurities" xlink:type="locator" xlink:label="fmnb_NumberOfSecurities" />
    <link:label xml:lang="en-US" xlink:label="fmnb_NumberOfSecurities_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Number of securities.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="fmnb_NumberOfSecurities" xlink:to="fmnb_NumberOfSecurities_lbl" />
    <link:loc xlink:href="fmnb-20201231.xsd#fmnb_NumberOfSecuritiesOnUnrealizedLossPosition" xlink:type="locator" xlink:label="fmnb_NumberOfSecuritiesOnUnrealizedLossPosition" />
    <link:label xml:lang="en-US" xlink:label="fmnb_NumberOfSecuritiesOnUnrealizedLossPosition_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Number of securities on unrealized loss position.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="fmnb_NumberOfSecuritiesOnUnrealizedLossPosition" xlink:to="fmnb_NumberOfSecuritiesOnUnrealizedLossPosition_lbl" />
    <link:label xml:lang="en-US" xlink:label="fmnb_NumberOfSecurities_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Number of securities</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_NumberOfSecurities_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Number Of Securities</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_NumberOfSecuritiesOnUnrealizedLossPosition_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Number of securities on unrealized loss position</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_NumberOfSecuritiesOnUnrealizedLossPosition_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Number Of Securities On Unrealized Loss Position</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTable" xlink:type="locator" xlink:label="us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTable" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule Of Accounts Notes Loans And Financing Receivable [Table]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTable" xlink:to="us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTable_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Schedule Of Accounts Notes Loans And Financing Receivable [Table]</link:label>
    <link:loc xlink:href="fmnb-20201231.xsd#fmnb_OriginatedLoansMember" xlink:type="locator" xlink:label="fmnb_OriginatedLoansMember" />
    <link:label xml:lang="en-US" xlink:label="fmnb_OriginatedLoansMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Originated loans.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="fmnb_OriginatedLoansMember" xlink:to="fmnb_OriginatedLoansMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="fmnb_OriginatedLoansMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Originated Loans</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_OriginatedLoansMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Originated Loans [Member]</link:label>
    <link:loc xlink:href="fmnb-20201231.xsd#fmnb_AcquiredLoansMember" xlink:type="locator" xlink:label="fmnb_AcquiredLoansMember" />
    <link:label xml:lang="en-US" xlink:label="fmnb_AcquiredLoansMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Acquired loans.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="fmnb_AcquiredLoansMember" xlink:to="fmnb_AcquiredLoansMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="fmnb_AcquiredLoansMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Acquired Loans</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_AcquiredLoansMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Acquired Loans [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis" xlink:type="locator" xlink:label="us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Class of Financing Receivable</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis" xlink:to="us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Financing Receivable Recorded Investment By Class Of Financing Receivable [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain" xlink:type="locator" xlink:label="us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Class of Financing Receivable</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain" xlink:to="us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Financing Receivable Recorded Investment Class Of Financing Receivable [Domain]</link:label>
    <link:loc xlink:href="fmnb-20201231.xsd#fmnb_CommercialRealEstateOwnerOccupiedMember" xlink:type="locator" xlink:label="fmnb_CommercialRealEstateOwnerOccupiedMember" />
    <link:label xml:lang="en-US" xlink:label="fmnb_CommercialRealEstateOwnerOccupiedMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Commercial real estate owner occupied.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="fmnb_CommercialRealEstateOwnerOccupiedMember" xlink:to="fmnb_CommercialRealEstateOwnerOccupiedMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="fmnb_CommercialRealEstateOwnerOccupiedMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Commercial real estate, Owner occupied</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_CommercialRealEstateOwnerOccupiedMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Commercial Real Estate Owner Occupied [Member]</link:label>
    <link:loc xlink:href="fmnb-20201231.xsd#fmnb_CommercialRealEstateNonOwnerOccupiedMember" xlink:type="locator" xlink:label="fmnb_CommercialRealEstateNonOwnerOccupiedMember" />
    <link:label xml:lang="en-US" xlink:label="fmnb_CommercialRealEstateNonOwnerOccupiedMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Commercial real estate non owner occupied.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="fmnb_CommercialRealEstateNonOwnerOccupiedMember" xlink:to="fmnb_CommercialRealEstateNonOwnerOccupiedMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="fmnb_CommercialRealEstateNonOwnerOccupiedMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Commercial real estate, Non-owner occupied</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_CommercialRealEstateNonOwnerOccupiedMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Commercial Real Estate Non Owner Occupied [Member]</link:label>
    <link:loc xlink:href="fmnb-20201231.xsd#fmnb_CommercialRealEstateFarmlandMember" xlink:type="locator" xlink:label="fmnb_CommercialRealEstateFarmlandMember" />
    <link:label xml:lang="en-US" xlink:label="fmnb_CommercialRealEstateFarmlandMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Commercial real estate farmland.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="fmnb_CommercialRealEstateFarmlandMember" xlink:to="fmnb_CommercialRealEstateFarmlandMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="fmnb_CommercialRealEstateFarmlandMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Commercial real estate, Farmland</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_CommercialRealEstateFarmlandMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Commercial Real Estate Farmland [Member]</link:label>
    <link:loc xlink:href="fmnb-20201231.xsd#fmnb_CommercialRealEstateOtherMember" xlink:type="locator" xlink:label="fmnb_CommercialRealEstateOtherMember" />
    <link:label xml:lang="en-US" xlink:label="fmnb_CommercialRealEstateOtherMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Commercial real estate other.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="fmnb_CommercialRealEstateOtherMember" xlink:to="fmnb_CommercialRealEstateOtherMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="fmnb_CommercialRealEstateOtherMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Commercial real estate, Other</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_CommercialRealEstateOtherMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Commercial Real Estate Other [Member]</link:label>
    <link:loc xlink:href="fmnb-20201231.xsd#fmnb_CommercialCommercialAndIndustrialMember" xlink:type="locator" xlink:label="fmnb_CommercialCommercialAndIndustrialMember" />
    <link:label xml:lang="en-US" xlink:label="fmnb_CommercialCommercialAndIndustrialMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Commercial commercial and industrial.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="fmnb_CommercialCommercialAndIndustrialMember" xlink:to="fmnb_CommercialCommercialAndIndustrialMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="fmnb_CommercialCommercialAndIndustrialMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Commercial, Commercial and industrial</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_CommercialCommercialAndIndustrialMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Commercial Commercial And Industrial [Member]</link:label>
    <link:loc xlink:href="fmnb-20201231.xsd#fmnb_ResidentialRealEstateOneToFourFamilyResidentialMember" xlink:type="locator" xlink:label="fmnb_ResidentialRealEstateOneToFourFamilyResidentialMember" />
    <link:label xml:lang="en-US" xlink:label="fmnb_ResidentialRealEstateOneToFourFamilyResidentialMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Residential real estate 1-4 family residential.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="fmnb_ResidentialRealEstateOneToFourFamilyResidentialMember" xlink:to="fmnb_ResidentialRealEstateOneToFourFamilyResidentialMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="fmnb_ResidentialRealEstateOneToFourFamilyResidentialMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Residential real estate, 1-4 family residential</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_ResidentialRealEstateOneToFourFamilyResidentialMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Residential Real Estate One To Four Family Residential [Member]</link:label>
    <link:loc xlink:href="fmnb-20201231.xsd#fmnb_CommercialAgriculturalMember" xlink:type="locator" xlink:label="fmnb_CommercialAgriculturalMember" />
    <link:label xml:lang="en-US" xlink:label="fmnb_CommercialAgriculturalMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Commercial agricultural.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="fmnb_CommercialAgriculturalMember" xlink:to="fmnb_CommercialAgriculturalMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="fmnb_CommercialAgriculturalMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Commercial, Agricultural</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_CommercialAgriculturalMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Commercial Agricultural [Member]</link:label>
    <link:loc xlink:href="fmnb-20201231.xsd#fmnb_ResidentialRealEstateHomeEquityMember" xlink:type="locator" xlink:label="fmnb_ResidentialRealEstateHomeEquityMember" />
    <link:label xml:lang="en-US" xlink:label="fmnb_ResidentialRealEstateHomeEquityMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Residential real estate home equity.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="fmnb_ResidentialRealEstateHomeEquityMember" xlink:to="fmnb_ResidentialRealEstateHomeEquityMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="fmnb_ResidentialRealEstateHomeEquityMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Residential real estate, Home equity lines of credit</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_ResidentialRealEstateHomeEquityMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Residential Real Estate Home Equity [Member]</link:label>
    <link:loc xlink:href="fmnb-20201231.xsd#fmnb_ConsumerIndirectMember" xlink:type="locator" xlink:label="fmnb_ConsumerIndirectMember" />
    <link:label xml:lang="en-US" xlink:label="fmnb_ConsumerIndirectMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Consumer indirect.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="fmnb_ConsumerIndirectMember" xlink:to="fmnb_ConsumerIndirectMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="fmnb_ConsumerIndirectMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Consumer, Indirect</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_ConsumerIndirectMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Consumer Indirect [Member]</link:label>
    <link:loc xlink:href="fmnb-20201231.xsd#fmnb_ConsumerDirectMember" xlink:type="locator" xlink:label="fmnb_ConsumerDirectMember" />
    <link:label xml:lang="en-US" xlink:label="fmnb_ConsumerDirectMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Consumer direct.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="fmnb_ConsumerDirectMember" xlink:to="fmnb_ConsumerDirectMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="fmnb_ConsumerDirectMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Consumer, Direct</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_ConsumerDirectMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Consumer Direct [Member]</link:label>
    <link:loc xlink:href="fmnb-20201231.xsd#fmnb_ConsumerOtherMember" xlink:type="locator" xlink:label="fmnb_ConsumerOtherMember" />
    <link:label xml:lang="en-US" xlink:label="fmnb_ConsumerOtherMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Consumer other member.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="fmnb_ConsumerOtherMember" xlink:to="fmnb_ConsumerOtherMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="fmnb_ConsumerOtherMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Consumer, Other</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_ConsumerOtherMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Consumer Other [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CommercialRealEstatePortfolioSegmentMember" xlink:type="locator" xlink:label="us-gaap_CommercialRealEstatePortfolioSegmentMember" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_CommercialRealEstatePortfolioSegmentMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Commercial real estate</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CommercialRealEstatePortfolioSegmentMember" xlink:to="us-gaap_CommercialRealEstatePortfolioSegmentMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_CommercialRealEstatePortfolioSegmentMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Commercial Real Estate Portfolio Segment [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CommercialPortfolioSegmentMember" xlink:type="locator" xlink:label="us-gaap_CommercialPortfolioSegmentMember" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_CommercialPortfolioSegmentMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Commercial</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CommercialPortfolioSegmentMember" xlink:to="us-gaap_CommercialPortfolioSegmentMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_CommercialPortfolioSegmentMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Commercial Portfolio Segment [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="us-gaap_ResidentialPortfolioSegmentMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Residential real estate</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ConsumerPortfolioSegmentMember" xlink:type="locator" xlink:label="us-gaap_ConsumerPortfolioSegmentMember" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ConsumerPortfolioSegmentMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Consumer</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ConsumerPortfolioSegmentMember" xlink:to="us-gaap_ConsumerPortfolioSegmentMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ConsumerPortfolioSegmentMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Consumer Portfolio Segment [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AccountsNotesAndLoansReceivableLineItems" xlink:type="locator" xlink:label="us-gaap_AccountsNotesAndLoansReceivableLineItems" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_AccountsNotesAndLoansReceivableLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accounts Notes And Loans Receivable [Line Items]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AccountsNotesAndLoansReceivableLineItems" xlink:to="us-gaap_AccountsNotesAndLoansReceivableLineItems_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_AccountsNotesAndLoansReceivableLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Accounts Notes And Loans Receivable [Line Items]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LoansAndLeasesReceivableDisclosureAbstract" xlink:type="locator" xlink:label="us-gaap_LoansAndLeasesReceivableDisclosureAbstract" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LoansAndLeasesReceivableDisclosureAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of loan balances</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LoansAndLeasesReceivableDisclosureAbstract" xlink:to="us-gaap_LoansAndLeasesReceivableDisclosureAbstract_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LoansAndLeasesReceivableDisclosureAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Loans And Leases Receivable Disclosure [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LoansAndLeasesReceivableGrossCarryingAmount" xlink:type="locator" xlink:label="us-gaap_LoansAndLeasesReceivableGrossCarryingAmount" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LoansAndLeasesReceivableGrossCarryingAmount_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Loan balances</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LoansAndLeasesReceivableGrossCarryingAmount" xlink:to="us-gaap_LoansAndLeasesReceivableGrossCarryingAmount_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LoansAndLeasesReceivableGrossCarryingAmount_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Loans And Leases Receivable Gross Carrying Amount</link:label>
    <link:label xml:lang="en-US" xlink:label="us-gaap_LoansAndLeasesReceivableNetReportedAmount_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Total loans</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_UnamortizedLoanCommitmentAndOriginationFeesAndUnamortizedDiscountsOrPremiums" xlink:type="locator" xlink:label="us-gaap_UnamortizedLoanCommitmentAndOriginationFeesAndUnamortizedDiscountsOrPremiums" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_UnamortizedLoanCommitmentAndOriginationFeesAndUnamortizedDiscountsOrPremiums_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Net deferred loan costs</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_UnamortizedLoanCommitmentAndOriginationFeesAndUnamortizedDiscountsOrPremiums" xlink:to="us-gaap_UnamortizedLoanCommitmentAndOriginationFeesAndUnamortizedDiscountsOrPremiums_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_UnamortizedLoanCommitmentAndOriginationFeesAndUnamortizedDiscountsOrPremiums_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Unamortized Loan Commitment And Origination Fees And Unamortized Discounts Or Premiums</link:label>
    <link:label xml:lang="en-US" xlink:label="us-gaap_LoansAndLeasesReceivableAllowance_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Allowance for loan losses</link:label>
    <link:loc xlink:href="fmnb-20201231.xsd#fmnb_CertainLoansAcquiredInTransferAccountedForAsDebtSecuritiesAcquiredDuringPeriodContractuallyRequiredPaymentsReceivableAtAcquisitionOutstandingBalance" xlink:type="locator" xlink:label="fmnb_CertainLoansAcquiredInTransferAccountedForAsDebtSecuritiesAcquiredDuringPeriodContractuallyRequiredPaymentsReceivableAtAcquisitionOutstandingBalance" />
    <link:label xml:lang="en-US" xlink:label="fmnb_CertainLoansAcquiredInTransferAccountedForAsDebtSecuritiesAcquiredDuringPeriodContractuallyRequiredPaymentsReceivableAtAcquisitionOutstandingBalance_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Certain loans acquired in transfer accounted for as debt securities acquired during period contractually required payments receivable at acquisition outstanding balance.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="fmnb_CertainLoansAcquiredInTransferAccountedForAsDebtSecuritiesAcquiredDuringPeriodContractuallyRequiredPaymentsReceivableAtAcquisitionOutstandingBalance" xlink:to="fmnb_CertainLoansAcquiredInTransferAccountedForAsDebtSecuritiesAcquiredDuringPeriodContractuallyRequiredPaymentsReceivableAtAcquisitionOutstandingBalance_lbl" />
    <link:loc xlink:href="fmnb-20201231.xsd#fmnb_CertainLoansAcquiredInTransferAccountedForAsDebtSecuritiesAcquiredDuringPeriodContractuallyRequiredPaymentsReceivableAtAcquisitionNetCarryingValue" xlink:type="locator" xlink:label="fmnb_CertainLoansAcquiredInTransferAccountedForAsDebtSecuritiesAcquiredDuringPeriodContractuallyRequiredPaymentsReceivableAtAcquisitionNetCarryingValue" />
    <link:label xml:lang="en-US" xlink:label="fmnb_CertainLoansAcquiredInTransferAccountedForAsDebtSecuritiesAcquiredDuringPeriodContractuallyRequiredPaymentsReceivableAtAcquisitionNetCarryingValue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Certain loans acquired in transfer accounted for as debt securities acquired during period contractually required payments receivable at acquisition net carrying value.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="fmnb_CertainLoansAcquiredInTransferAccountedForAsDebtSecuritiesAcquiredDuringPeriodContractuallyRequiredPaymentsReceivableAtAcquisitionNetCarryingValue" xlink:to="fmnb_CertainLoansAcquiredInTransferAccountedForAsDebtSecuritiesAcquiredDuringPeriodContractuallyRequiredPaymentsReceivableAtAcquisitionNetCarryingValue_lbl" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ScheduleOfImpairedFinancingReceivableTable" xlink:type="locator" xlink:label="us-gaap_ScheduleOfImpairedFinancingReceivableTable" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ScheduleOfImpairedFinancingReceivableTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule Of Impaired Financing Receivable [Table]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfImpairedFinancingReceivableTable" xlink:to="us-gaap_ScheduleOfImpairedFinancingReceivableTable_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ScheduleOfImpairedFinancingReceivableTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Schedule Of Impaired Financing Receivable [Table]</link:label>
    <link:loc xlink:href="fmnb-20201231.xsd#fmnb_NationalBancsharesCorporationMember" xlink:type="locator" xlink:label="fmnb_NationalBancsharesCorporationMember" />
    <link:label xml:lang="en-US" xlink:label="fmnb_NationalBancsharesCorporationMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">National Bancshares Corporation.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="fmnb_NationalBancsharesCorporationMember" xlink:to="fmnb_NationalBancsharesCorporationMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="fmnb_NationalBancsharesCorporationMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">National Bancshares Corporation</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_NationalBancsharesCorporationMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">National Bancshares Corporation [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FinancingReceivableImpairedLineItems" xlink:type="locator" xlink:label="us-gaap_FinancingReceivableImpairedLineItems" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FinancingReceivableImpairedLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Financing Receivable Impaired [Line Items]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FinancingReceivableImpairedLineItems" xlink:to="us-gaap_FinancingReceivableImpairedLineItems_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FinancingReceivableImpairedLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Financing Receivable Impaired [Line Items]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CertainLoansAcquiredInTransferAccountedForAsDebtSecuritiesAcquiredDuringPeriodContractuallyRequiredPaymentsReceivableAtAcquisition" xlink:type="locator" xlink:label="us-gaap_CertainLoansAcquiredInTransferAccountedForAsDebtSecuritiesAcquiredDuringPeriodContractuallyRequiredPaymentsReceivableAtAcquisition" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_CertainLoansAcquiredInTransferAccountedForAsDebtSecuritiesAcquiredDuringPeriodContractuallyRequiredPaymentsReceivableAtAcquisition_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Loans acquired with deteriorated credit quality</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CertainLoansAcquiredInTransferAccountedForAsDebtSecuritiesAcquiredDuringPeriodContractuallyRequiredPaymentsReceivableAtAcquisition" xlink:to="us-gaap_CertainLoansAcquiredInTransferAccountedForAsDebtSecuritiesAcquiredDuringPeriodContractuallyRequiredPaymentsReceivableAtAcquisition_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_CertainLoansAcquiredInTransferAccountedForAsDebtSecuritiesAcquiredDuringPeriodContractuallyRequiredPaymentsReceivableAtAcquisition_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Certain Loans Acquired In Transfer Accounted For As Debt Securities Acquired During Period Contractually Required Payments Receivable At Acquisition</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_CertainLoansAcquiredInTransferAccountedForAsDebtSecuritiesAcquiredDuringPeriodContractuallyRequiredPaymentsReceivableAtAcquisitionOutstandingBalance_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Total outstanding balance</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_CertainLoansAcquiredInTransferAccountedForAsDebtSecuritiesAcquiredDuringPeriodContractuallyRequiredPaymentsReceivableAtAcquisitionOutstandingBalance_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Certain Loans Acquired In Transfer Accounted For As Debt Securities Acquired During Period Contractually Required Payments Receivable At Acquisition Outstanding Balance</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_CertainLoansAcquiredInTransferAccountedForAsDebtSecuritiesAcquiredDuringPeriodContractuallyRequiredPaymentsReceivableAtAcquisitionNetCarryingValue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Carrying amount, net of allowance</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_CertainLoansAcquiredInTransferAccountedForAsDebtSecuritiesAcquiredDuringPeriodContractuallyRequiredPaymentsReceivableAtAcquisitionNetCarryingValue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Certain Loans Acquired In Transfer Accounted For As Debt Securities Acquired During Period Contractually Required Payments Receivable At Acquisition Net Carrying Value</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CreditLossStatusAxis" xlink:type="locator" xlink:label="us-gaap_CreditLossStatusAxis" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_CreditLossStatusAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Credit Loss Status</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CreditLossStatusAxis" xlink:to="us-gaap_CreditLossStatusAxis_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_CreditLossStatusAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Credit Loss Status [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CreditLossStatusDomain" xlink:type="locator" xlink:label="us-gaap_CreditLossStatusDomain" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_CreditLossStatusDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Credit Loss Status</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CreditLossStatusDomain" xlink:to="us-gaap_CreditLossStatusDomain_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_CreditLossStatusDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Credit Loss Status [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FinancialAssetAcquiredWithCreditDeteriorationMember" xlink:type="locator" xlink:label="us-gaap_FinancialAssetAcquiredWithCreditDeteriorationMember" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FinancialAssetAcquiredWithCreditDeteriorationMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Receivables Acquired with Deteriorated Credit Quality</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FinancialAssetAcquiredWithCreditDeteriorationMember" xlink:to="us-gaap_FinancialAssetAcquiredWithCreditDeteriorationMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FinancialAssetAcquiredWithCreditDeteriorationMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Financial Asset Acquired With Credit Deterioration [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FinancingReceivableAllowanceForCreditLosses" xlink:type="locator" xlink:label="us-gaap_FinancingReceivableAllowanceForCreditLosses" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FinancingReceivableAllowanceForCreditLosses_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Acquired with deteriorated credit quality, allowances</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FinancingReceivableAllowanceForCreditLosses" xlink:to="us-gaap_FinancingReceivableAllowanceForCreditLosses_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FinancingReceivableAllowanceForCreditLosses_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Financing Receivable Allowance For Credit Losses</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYield" xlink:type="locator" xlink:label="us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYield" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYield_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Beginning balance</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYield" xlink:to="us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYield_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYield_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Accretable Yield</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldAdditions" xlink:type="locator" xlink:label="us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldAdditions" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldAdditions_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">New loans purchased</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldAdditions" xlink:to="us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldAdditions_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldAdditions_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Accretable Yield Additions</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldAccretion" xlink:type="locator" xlink:label="us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldAccretion" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldAccretion_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Accretion of income</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldAccretion" xlink:to="us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldAccretion_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldAccretion_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Accretable Yield Accretion</link:label>
    <link:label xml:lang="en-US" xlink:label="us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYield_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Ending balance</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ScheduleOfFinancingReceivableAllowanceForCreditLossesTable" xlink:type="locator" xlink:label="us-gaap_ScheduleOfFinancingReceivableAllowanceForCreditLossesTable" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ScheduleOfFinancingReceivableAllowanceForCreditLossesTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule Of Financing Receivable Allowance For Credit Losses [Table]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfFinancingReceivableAllowanceForCreditLossesTable" xlink:to="us-gaap_ScheduleOfFinancingReceivableAllowanceForCreditLossesTable_lbl" />
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    <link:label xml:lang="en-US" xlink:label="fmnb_TroubledDebtRestructuringsMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Troubled Debt Restructurings [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ContractualInterestRateReductionMember" xlink:type="locator" xlink:label="us-gaap_ContractualInterestRateReductionMember" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ContractualInterestRateReductionMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Contractual Interest Rate Reduction</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ContractualInterestRateReductionMember" xlink:to="us-gaap_ContractualInterestRateReductionMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ContractualInterestRateReductionMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Contractual Interest Rate Reduction [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ExtendedMaturityMember" xlink:type="locator" xlink:label="us-gaap_ExtendedMaturityMember" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ExtendedMaturityMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Extended Maturity</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ExtendedMaturityMember" xlink:to="us-gaap_ExtendedMaturityMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ExtendedMaturityMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Extended Maturity [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ResidentialMortgageMember" xlink:type="locator" xlink:label="us-gaap_ResidentialMortgageMember" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ResidentialMortgageMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Residential real estate loan</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ResidentialMortgageMember" xlink:to="us-gaap_ResidentialMortgageMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ResidentialMortgageMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Residential Mortgage [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PaymentDeferralMember" xlink:type="locator" xlink:label="us-gaap_PaymentDeferralMember" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_PaymentDeferralMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Payment Deferral</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PaymentDeferralMember" xlink:to="us-gaap_PaymentDeferralMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_PaymentDeferralMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Payment Deferral [Member]</link:label>
    <link:loc xlink:href="fmnb-20201231.xsd#fmnb_SecondThreeMonthPaymentDeferralMember" xlink:type="locator" xlink:label="fmnb_SecondThreeMonthPaymentDeferralMember" />
    <link:label xml:lang="en-US" xlink:label="fmnb_SecondThreeMonthPaymentDeferralMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Second three month payment deferral.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="fmnb_SecondThreeMonthPaymentDeferralMember" xlink:to="fmnb_SecondThreeMonthPaymentDeferralMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="fmnb_SecondThreeMonthPaymentDeferralMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Second Three Month Deferral Payments</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_SecondThreeMonthPaymentDeferralMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Second Three Month Payment Deferral [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LoansInsuredOrGuaranteedByGovernmentAuthoritiesAxis" xlink:type="locator" xlink:label="us-gaap_LoansInsuredOrGuaranteedByGovernmentAuthoritiesAxis" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LoansInsuredOrGuaranteedByGovernmentAuthoritiesAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Loans Insured or Guaranteed by Government Authorities</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LoansInsuredOrGuaranteedByGovernmentAuthoritiesAxis" xlink:to="us-gaap_LoansInsuredOrGuaranteedByGovernmentAuthoritiesAxis_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LoansInsuredOrGuaranteedByGovernmentAuthoritiesAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Loans Insured Or Guaranteed By Government Authorities [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LoansInsuredOrGuaranteedByGovernmentAuthoritiesDomain" xlink:type="locator" xlink:label="us-gaap_LoansInsuredOrGuaranteedByGovernmentAuthoritiesDomain" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LoansInsuredOrGuaranteedByGovernmentAuthoritiesDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Loans Insured or Guaranteed by Government Authorities</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LoansInsuredOrGuaranteedByGovernmentAuthoritiesDomain" xlink:to="us-gaap_LoansInsuredOrGuaranteedByGovernmentAuthoritiesDomain_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LoansInsuredOrGuaranteedByGovernmentAuthoritiesDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Loans Insured Or Guaranteed By Government Authorities [Domain]</link:label>
    <link:loc xlink:href="fmnb-20201231.xsd#fmnb_SmallBusinessAdministrationSBACARESActPaycheckProtectionProgramMember" xlink:type="locator" xlink:label="fmnb_SmallBusinessAdministrationSBACARESActPaycheckProtectionProgramMember" />
    <link:label xml:lang="en-US" xlink:label="fmnb_SmallBusinessAdministrationSBACARESActPaycheckProtectionProgramMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Small Business Administration (SBA), CARES Act, Paycheck Protection Program.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="fmnb_SmallBusinessAdministrationSBACARESActPaycheckProtectionProgramMember" xlink:to="fmnb_SmallBusinessAdministrationSBACARESActPaycheckProtectionProgramMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="fmnb_SmallBusinessAdministrationSBACARESActPaycheckProtectionProgramMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Small Business Administration (SBA), CARES Act, Paycheck Protection Program</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_SmallBusinessAdministrationSBACARESActPaycheckProtectionProgramMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Small Business Administration S B A C A R E S Act Paycheck Protection Program [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FinancingReceivableModificationsLineItems" xlink:type="locator" xlink:label="us-gaap_FinancingReceivableModificationsLineItems" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FinancingReceivableModificationsLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Financing Receivable Modifications [Line Items]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FinancingReceivableModificationsLineItems" xlink:to="us-gaap_FinancingReceivableModificationsLineItems_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FinancingReceivableModificationsLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Financing Receivable Modifications [Line Items]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FinancingReceivableModificationsRecordedInvestment" xlink:type="locator" xlink:label="us-gaap_FinancingReceivableModificationsRecordedInvestment" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FinancingReceivableModificationsRecordedInvestment_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Total troubled debt restructurings</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FinancingReceivableModificationsRecordedInvestment" xlink:to="us-gaap_FinancingReceivableModificationsRecordedInvestment_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FinancingReceivableModificationsRecordedInvestment_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Financing Receivable Modifications Recorded Investment</link:label>
    <link:label xml:lang="en-US" xlink:label="us-gaap_FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Specific reserves to customers</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LoansAndLeasesReceivableImpairedCommitmentToLend" xlink:type="locator" xlink:label="us-gaap_LoansAndLeasesReceivableImpairedCommitmentToLend" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LoansAndLeasesReceivableImpairedCommitmentToLend_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Commitments to lend additional amounts to borrowers classified as troubled debt restructurings</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LoansAndLeasesReceivableImpairedCommitmentToLend" xlink:to="us-gaap_LoansAndLeasesReceivableImpairedCommitmentToLend_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LoansAndLeasesReceivableImpairedCommitmentToLend_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Loans And Leases Receivable Impaired Commitment To Lend</link:label>
    <link:loc xlink:href="fmnb-20201231.xsd#fmnb_DebtInstrumentInterestRateReductionPercentage" xlink:type="locator" xlink:label="fmnb_DebtInstrumentInterestRateReductionPercentage" />
    <link:label xml:lang="en-US" xlink:label="fmnb_DebtInstrumentInterestRateReductionPercentage_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Debt instrument interest rate reduction percentage.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="fmnb_DebtInstrumentInterestRateReductionPercentage" xlink:to="fmnb_DebtInstrumentInterestRateReductionPercentage_lbl" />
    <link:loc xlink:href="fmnb-20201231.xsd#fmnb_DebtInstrumentMaturityDateLengthOfExtensionPeriod" xlink:type="locator" xlink:label="fmnb_DebtInstrumentMaturityDateLengthOfExtensionPeriod" />
    <link:label xml:lang="en-US" xlink:label="fmnb_DebtInstrumentMaturityDateLengthOfExtensionPeriod_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Debt instrument maturity date length of extension period.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="fmnb_DebtInstrumentMaturityDateLengthOfExtensionPeriod" xlink:to="fmnb_DebtInstrumentMaturityDateLengthOfExtensionPeriod_lbl" />
    <link:label xml:lang="en-US" xlink:label="fmnb_DebtInstrumentInterestRateReductionPercentage_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Reduction of the notes stated interest rate</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_DebtInstrumentInterestRateReductionPercentage_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument Interest Rate Reduction Percentage</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_DebtInstrumentMaturityDateLengthOfExtensionPeriod_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Maturity period loans</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_DebtInstrumentMaturityDateLengthOfExtensionPeriod_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument Maturity Date Length Of Extension Period</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FinancingReceivableModificationsNumberOfContracts2" xlink:type="locator" xlink:label="us-gaap_FinancingReceivableModificationsNumberOfContracts2" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FinancingReceivableModificationsNumberOfContracts2_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Number of Loans</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FinancingReceivableModificationsNumberOfContracts2" xlink:to="us-gaap_FinancingReceivableModificationsNumberOfContracts2_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FinancingReceivableModificationsNumberOfContracts2_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Financing Receivable Modifications Number Of Contracts2</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FinancingReceivableModificationsPreModificationRecordedInvestment2" xlink:type="locator" xlink:label="us-gaap_FinancingReceivableModificationsPreModificationRecordedInvestment2" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FinancingReceivableModificationsPreModificationRecordedInvestment2_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Pre-Modification Outstanding Recorded Investment</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FinancingReceivableModificationsPreModificationRecordedInvestment2" xlink:to="us-gaap_FinancingReceivableModificationsPreModificationRecordedInvestment2_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FinancingReceivableModificationsPreModificationRecordedInvestment2_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Financing Receivable Modifications Pre Modification Recorded Investment2</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2" xlink:type="locator" xlink:label="us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Post-Modification Outstanding Recorded Investment</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2" xlink:to="us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Financing Receivable Modifications Post Modification Recorded Investment2</link:label>
    <link:loc xlink:href="fmnb-20201231.xsd#fmnb_AllowanceForLoanLossesPeriodIncreaseDecrease" xlink:type="locator" xlink:label="fmnb_AllowanceForLoanLossesPeriodIncreaseDecrease" />
    <link:label xml:lang="en-US" xlink:label="fmnb_AllowanceForLoanLossesPeriodIncreaseDecrease_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Allowance for loan losses period increase decrease.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="fmnb_AllowanceForLoanLossesPeriodIncreaseDecrease" xlink:to="fmnb_AllowanceForLoanLossesPeriodIncreaseDecrease_lbl" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FinancingReceivablesImpairedTroubledDebtRestructuringWriteDown" xlink:type="locator" xlink:label="us-gaap_FinancingReceivablesImpairedTroubledDebtRestructuringWriteDown" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FinancingReceivablesImpairedTroubledDebtRestructuringWriteDown_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Allowance adjustment charge offs</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FinancingReceivablesImpairedTroubledDebtRestructuringWriteDown" xlink:to="us-gaap_FinancingReceivablesImpairedTroubledDebtRestructuringWriteDown_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FinancingReceivablesImpairedTroubledDebtRestructuringWriteDown_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Financing Receivables Impaired Troubled Debt Restructuring Write Down</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_AllowanceForLoanLossesPeriodIncreaseDecrease_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Increase in the allowance for loan losses as a result of the allowance</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_AllowanceForLoanLossesPeriodIncreaseDecrease_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Allowance For Loan Losses Period Increase Decrease</link:label>
    <link:loc xlink:href="fmnb-20201231.xsd#fmnb_FinancingReceivablePeriodOfModifiedContractuallyPastDueLoansToBeConsideredAsPaymentDefault" xlink:type="locator" xlink:label="fmnb_FinancingReceivablePeriodOfModifiedContractuallyPastDueLoansToBeConsideredAsPaymentDefault" />
    <link:label xml:lang="en-US" xlink:label="fmnb_FinancingReceivablePeriodOfModifiedContractuallyPastDueLoansToBeConsideredAsPaymentDefault_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Financing receivable period of modified contractually past due loans to be considered as payment default.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="fmnb_FinancingReceivablePeriodOfModifiedContractuallyPastDueLoansToBeConsideredAsPaymentDefault" xlink:to="fmnb_FinancingReceivablePeriodOfModifiedContractuallyPastDueLoansToBeConsideredAsPaymentDefault_lbl" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FinancingReceivableModificationsSubsequentDefaultNumberOfContracts1" xlink:type="locator" xlink:label="us-gaap_FinancingReceivableModificationsSubsequentDefaultNumberOfContracts1" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FinancingReceivableModificationsSubsequentDefaultNumberOfContracts1_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Troubled debt restructured loans with subsequent payment defaults | Loans</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FinancingReceivableModificationsSubsequentDefaultNumberOfContracts1" xlink:to="us-gaap_FinancingReceivableModificationsSubsequentDefaultNumberOfContracts1_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FinancingReceivableModificationsSubsequentDefaultNumberOfContracts1_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Financing Receivable Modifications Subsequent Default Number Of Contracts1</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_FinancingReceivablePeriodOfModifiedContractuallyPastDueLoansToBeConsideredAsPaymentDefault_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Loans default payment past due period</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_FinancingReceivablePeriodOfModifiedContractuallyPastDueLoansToBeConsideredAsPaymentDefault_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Financing Receivable Period Of Modified Contractually Past Due Loans To Be Considered As Payment Default</link:label>
    <link:label xml:lang="en-US" xlink:label="us-gaap_FinancingReceivableModificationsRecordedInvestment_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Outstanding Balance</link:label>
    <link:loc xlink:href="fmnb-20201231.xsd#fmnb_NumberOfMonthsOfferedForDeferralPayments" xlink:type="locator" xlink:label="fmnb_NumberOfMonthsOfferedForDeferralPayments" />
    <link:label xml:lang="en-US" xlink:label="fmnb_NumberOfMonthsOfferedForDeferralPayments_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Number of months offered for deferral payments.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="fmnb_NumberOfMonthsOfferedForDeferralPayments" xlink:to="fmnb_NumberOfMonthsOfferedForDeferralPayments_lbl" />
    <link:label xml:lang="en-US" xlink:label="fmnb_NumberOfMonthsOfferedForDeferralPayments_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Number of months offered, deferrals</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_NumberOfMonthsOfferedForDeferralPayments_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Number Of Months Offered For Deferral Payments</link:label>
    <link:loc xlink:href="fmnb-20201231.xsd#fmnb_NumberOfBusinessCustomers" xlink:type="locator" xlink:label="fmnb_NumberOfBusinessCustomers" />
    <link:label xml:lang="en-US" xlink:label="fmnb_NumberOfBusinessCustomers_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Number of business customers.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="fmnb_NumberOfBusinessCustomers" xlink:to="fmnb_NumberOfBusinessCustomers_lbl" />
    <link:loc xlink:href="fmnb-20201231.xsd#fmnb_PaymentsReceivedFromForgivenessOfLoans" xlink:type="locator" xlink:label="fmnb_PaymentsReceivedFromForgivenessOfLoans" />
    <link:label xml:lang="en-US" xlink:label="fmnb_PaymentsReceivedFromForgivenessOfLoans_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Payments received from forgiveness of loans.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="fmnb_PaymentsReceivedFromForgivenessOfLoans" xlink:to="fmnb_PaymentsReceivedFromForgivenessOfLoans_lbl" />
    <link:loc xlink:href="fmnb-20201231.xsd#fmnb_PercentageOfPaymentsReceivedFromForgivenessOfLoans" xlink:type="locator" xlink:label="fmnb_PercentageOfPaymentsReceivedFromForgivenessOfLoans" />
    <link:label xml:lang="en-US" xlink:label="fmnb_PercentageOfPaymentsReceivedFromForgivenessOfLoans_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Percentage of payments received from forgiveness of loans.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="fmnb_PercentageOfPaymentsReceivedFromForgivenessOfLoans" xlink:to="fmnb_PercentageOfPaymentsReceivedFromForgivenessOfLoans_lbl" />
    <link:label xml:lang="en-US" xlink:label="fmnb_NumberOfBusinessCustomers_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Number of business customers facilitated assistance</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_NumberOfBusinessCustomers_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Number Of Business Customers</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_PaymentsReceivedFromForgivenessOfLoans_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Payments received from forgiveness of loans</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_PaymentsReceivedFromForgivenessOfLoans_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Payments Received From Forgiveness Of Loans</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_PercentageOfPaymentsReceivedFromForgivenessOfLoans_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Percentage of payments received from forgiveness of loans</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_PercentageOfPaymentsReceivedFromForgivenessOfLoans_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Percentage Of Payments Received From Forgiveness Of Loans</link:label>
    <link:loc xlink:href="fmnb-20201231.xsd#fmnb_CommercialLoanAndCommercialRealEstateRiskMaximum" xlink:type="locator" xlink:label="fmnb_CommercialLoanAndCommercialRealEstateRiskMaximum" />
    <link:label xml:lang="en-US" xlink:label="fmnb_CommercialLoanAndCommercialRealEstateRiskMaximum_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Commercial loan and commercial real estate risk maximum.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="fmnb_CommercialLoanAndCommercialRealEstateRiskMaximum" xlink:to="fmnb_CommercialLoanAndCommercialRealEstateRiskMaximum_lbl" />
    <link:label xml:lang="en-US" xlink:label="fmnb_CommercialLoanAndCommercialRealEstateRiskMaximum_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Maximum commercial loan and commercial real estate relationships</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_CommercialLoanAndCommercialRealEstateRiskMaximum_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Commercial Loan And Commercial Real Estate Risk Maximum</link:label>
    <link:loc xlink:href="fmnb-20201231.xsd#fmnb_CreditQualityIndicatorsAbstract" xlink:type="locator" xlink:label="fmnb_CreditQualityIndicatorsAbstract" />
    <link:label xml:lang="en-US" xlink:label="fmnb_CreditQualityIndicatorsAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Credit quality indicators.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="fmnb_CreditQualityIndicatorsAbstract" xlink:to="fmnb_CreditQualityIndicatorsAbstract_lbl" />
    <link:label xml:lang="en-US" xlink:label="fmnb_CreditQualityIndicatorsAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Credit Quality Indicators [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ScheduleOfFinancingReceivableRecordedInvestmentCreditQualityIndicatorTable" xlink:type="locator" xlink:label="us-gaap_ScheduleOfFinancingReceivableRecordedInvestmentCreditQualityIndicatorTable" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ScheduleOfFinancingReceivableRecordedInvestmentCreditQualityIndicatorTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule Of Financing Receivable Recorded Investment Credit Quality Indicator [Table]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfFinancingReceivableRecordedInvestmentCreditQualityIndicatorTable" xlink:to="us-gaap_ScheduleOfFinancingReceivableRecordedInvestmentCreditQualityIndicatorTable_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ScheduleOfFinancingReceivableRecordedInvestmentCreditQualityIndicatorTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Schedule Of Financing Receivable Recorded Investment Credit Quality Indicator [Table]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_InternalCreditAssessmentAxis" xlink:type="locator" xlink:label="us-gaap_InternalCreditAssessmentAxis" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_InternalCreditAssessmentAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Internal Credit Assessment</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InternalCreditAssessmentAxis" xlink:to="us-gaap_InternalCreditAssessmentAxis_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_InternalCreditAssessmentAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Internal Credit Assessment [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_InternalCreditAssessmentDomain" xlink:type="locator" xlink:label="us-gaap_InternalCreditAssessmentDomain" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_InternalCreditAssessmentDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Internal Credit Assessment</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InternalCreditAssessmentDomain" xlink:to="us-gaap_InternalCreditAssessmentDomain_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_InternalCreditAssessmentDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Internal Credit Assessment [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PassMember" xlink:type="locator" xlink:label="us-gaap_PassMember" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_PassMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Pass</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PassMember" xlink:to="us-gaap_PassMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_PassMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Pass [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_SpecialMentionMember" xlink:type="locator" xlink:label="us-gaap_SpecialMentionMember" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_SpecialMentionMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Special Mention</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SpecialMentionMember" xlink:to="us-gaap_SpecialMentionMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_SpecialMentionMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Special Mention [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_SubstandardMember" xlink:type="locator" xlink:label="us-gaap_SubstandardMember" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_SubstandardMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Substandard</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SubstandardMember" xlink:to="us-gaap_SubstandardMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_SubstandardMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Substandard [Member]</link:label>
    <link:loc xlink:href="fmnb-20201231.xsd#fmnb_CommercialFarmlandMember" xlink:type="locator" xlink:label="fmnb_CommercialFarmlandMember" />
    <link:label xml:lang="en-US" xlink:label="fmnb_CommercialFarmlandMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Commercial farmland.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="fmnb_CommercialFarmlandMember" xlink:to="fmnb_CommercialFarmlandMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="fmnb_CommercialFarmlandMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Commercial farmland</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_CommercialFarmlandMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Commercial Farmland [Member]</link:label>
    <link:loc xlink:href="fmnb-20201231.xsd#fmnb_CommercialAndIndustrialMember" xlink:type="locator" xlink:label="fmnb_CommercialAndIndustrialMember" />
    <link:label xml:lang="en-US" xlink:label="fmnb_CommercialAndIndustrialMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Commercial and industrial.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="fmnb_CommercialAndIndustrialMember" xlink:to="fmnb_CommercialAndIndustrialMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="fmnb_CommercialAndIndustrialMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Commercial and industrial</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_CommercialAndIndustrialMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Commercial And Industrial [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FinancingReceivableRecordedInvestmentLineItems" xlink:type="locator" xlink:label="us-gaap_FinancingReceivableRecordedInvestmentLineItems" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FinancingReceivableRecordedInvestmentLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Financing Receivable Recorded Investment [Line Items]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FinancingReceivableRecordedInvestmentLineItems" xlink:to="us-gaap_FinancingReceivableRecordedInvestmentLineItems_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FinancingReceivableRecordedInvestmentLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Financing Receivable Recorded Investment [Line Items]</link:label>
    <link:label xml:lang="en-US" xlink:label="us-gaap_NotesReceivableNet_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Total risk category of loans by class of loans</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FinancialInstrumentPerformanceStatusAxis" xlink:type="locator" xlink:label="us-gaap_FinancialInstrumentPerformanceStatusAxis" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FinancialInstrumentPerformanceStatusAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Financial Instrument Performance Status</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FinancialInstrumentPerformanceStatusAxis" xlink:to="us-gaap_FinancialInstrumentPerformanceStatusAxis_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FinancialInstrumentPerformanceStatusAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Financial Instrument Performance Status [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FinancialInstrumentPerformanceStatusDomain" xlink:type="locator" xlink:label="us-gaap_FinancialInstrumentPerformanceStatusDomain" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FinancialInstrumentPerformanceStatusDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Financial Instrument Performance Status</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FinancialInstrumentPerformanceStatusDomain" xlink:to="us-gaap_FinancialInstrumentPerformanceStatusDomain_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FinancialInstrumentPerformanceStatusDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Financial Instrument Performance Status [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PerformingFinancingReceivableMember" xlink:type="locator" xlink:label="us-gaap_PerformingFinancingReceivableMember" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_PerformingFinancingReceivableMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Performing Financing Receivable</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PerformingFinancingReceivableMember" xlink:to="us-gaap_PerformingFinancingReceivableMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_PerformingFinancingReceivableMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Performing Financing Receivable [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_NonperformingFinancingReceivableMember" xlink:type="locator" xlink:label="us-gaap_NonperformingFinancingReceivableMember" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_NonperformingFinancingReceivableMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Nonperforming Financing Receivable</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NonperformingFinancingReceivableMember" xlink:to="us-gaap_NonperformingFinancingReceivableMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_NonperformingFinancingReceivableMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Nonperforming Financing Receivable [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DisaggregationOfRevenueAbstract" xlink:type="locator" xlink:label="us-gaap_DisaggregationOfRevenueAbstract" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DisaggregationOfRevenueAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Disaggregation Of Revenue [Abstract]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DisaggregationOfRevenueAbstract" xlink:to="us-gaap_DisaggregationOfRevenueAbstract_lbl" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DisaggregationOfRevenueTable" xlink:type="locator" xlink:label="us-gaap_DisaggregationOfRevenueTable" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DisaggregationOfRevenueTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Disaggregation Of Revenue [Table]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DisaggregationOfRevenueTable" xlink:to="us-gaap_DisaggregationOfRevenueTable_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DisaggregationOfRevenueTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Disaggregation Of Revenue [Table]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_ConsolidationItemsAxis" xlink:type="locator" xlink:label="srt_ConsolidationItemsAxis" />
    <link:label xml:lang="en-US" xlink:label="srt_ConsolidationItemsAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Consolidation Items</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="srt_ConsolidationItemsAxis" xlink:to="srt_ConsolidationItemsAxis_lbl" />
    <link:label xml:lang="en-US" xlink:label="srt_ConsolidationItemsAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Consolidation Items [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_ConsolidationItemsDomain" xlink:type="locator" xlink:label="srt_ConsolidationItemsDomain" />
    <link:label xml:lang="en-US" xlink:label="srt_ConsolidationItemsDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Consolidation Items</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="srt_ConsolidationItemsDomain" xlink:to="srt_ConsolidationItemsDomain_lbl" />
    <link:label xml:lang="en-US" xlink:label="srt_ConsolidationItemsDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Consolidation Items [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OperatingSegmentsMember" xlink:type="locator" xlink:label="us-gaap_OperatingSegmentsMember" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_OperatingSegmentsMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Operating Segments</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OperatingSegmentsMember" xlink:to="us-gaap_OperatingSegmentsMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_OperatingSegmentsMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Operating Segments [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StatementBusinessSegmentsAxis" xlink:type="locator" xlink:label="us-gaap_StatementBusinessSegmentsAxis" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_StatementBusinessSegmentsAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Segments</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StatementBusinessSegmentsAxis" xlink:to="us-gaap_StatementBusinessSegmentsAxis_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_StatementBusinessSegmentsAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Statement Business Segments [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_SegmentDomain" xlink:type="locator" xlink:label="us-gaap_SegmentDomain" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_SegmentDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Segments</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SegmentDomain" xlink:to="us-gaap_SegmentDomain_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_SegmentDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Segment [Domain]</link:label>
    <link:loc xlink:href="fmnb-20201231.xsd#fmnb_TrustSegmentMember" xlink:type="locator" xlink:label="fmnb_TrustSegmentMember" />
    <link:label xml:lang="en-US" xlink:label="fmnb_TrustSegmentMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Trust segment.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="fmnb_TrustSegmentMember" xlink:to="fmnb_TrustSegmentMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="fmnb_TrustSegmentMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Trust Segment</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_TrustSegmentMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Trust Segment [Member]</link:label>
    <link:loc xlink:href="fmnb-20201231.xsd#fmnb_BankSegmentMember" xlink:type="locator" xlink:label="fmnb_BankSegmentMember" />
    <link:label xml:lang="en-US" xlink:label="fmnb_BankSegmentMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Bank segment.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="fmnb_BankSegmentMember" xlink:to="fmnb_BankSegmentMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="fmnb_BankSegmentMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Bank Segment</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_BankSegmentMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Bank Segment [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FinancialServiceOtherMember" xlink:type="locator" xlink:label="us-gaap_FinancialServiceOtherMember" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FinancialServiceOtherMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Other</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FinancialServiceOtherMember" xlink:to="us-gaap_FinancialServiceOtherMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FinancialServiceOtherMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Financial Service Other [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DisaggregationOfRevenueLineItems" xlink:type="locator" xlink:label="us-gaap_DisaggregationOfRevenueLineItems" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DisaggregationOfRevenueLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Disaggregation Of Revenue [Line Items]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DisaggregationOfRevenueLineItems" xlink:to="us-gaap_DisaggregationOfRevenueLineItems_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DisaggregationOfRevenueLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Disaggregation Of Revenue [Line Items]</link:label>
    <link:label xml:lang="en-US" xlink:label="us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Noninterest income</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RevenueNotFromContractWithCustomer" xlink:type="locator" xlink:label="us-gaap_RevenueNotFromContractWithCustomer" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_RevenueNotFromContractWithCustomer_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Other (outside the scope of ASC 606)</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RevenueNotFromContractWithCustomer" xlink:to="us-gaap_RevenueNotFromContractWithCustomer_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_RevenueNotFromContractWithCustomer_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Revenue Not From Contract With Customer</link:label>
    <link:loc xlink:href="fmnb-20201231.xsd#fmnb_ContingentFeesAndCommissionsDebitCardsReceivable" xlink:type="locator" xlink:label="fmnb_ContingentFeesAndCommissionsDebitCardsReceivable" />
    <link:label xml:lang="en-US" xlink:label="fmnb_ContingentFeesAndCommissionsDebitCardsReceivable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Contingent fees and commissions debit cards receivable.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="fmnb_ContingentFeesAndCommissionsDebitCardsReceivable" xlink:to="fmnb_ContingentFeesAndCommissionsDebitCardsReceivable_lbl" />
    <link:loc xlink:href="fmnb-20201231.xsd#fmnb_RevenueFromContractWithCustomerLineItems" xlink:type="locator" xlink:label="fmnb_RevenueFromContractWithCustomerLineItems" />
    <link:label xml:lang="en-US" xlink:label="fmnb_RevenueFromContractWithCustomerLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Revenue from contract with customer.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="fmnb_RevenueFromContractWithCustomerLineItems" xlink:to="fmnb_RevenueFromContractWithCustomerLineItems_lbl" />
    <link:loc xlink:href="fmnb-20201231.xsd#fmnb_RevenueFromContractWithCustomerTable" xlink:type="locator" xlink:label="fmnb_RevenueFromContractWithCustomerTable" />
    <link:label xml:lang="en-US" xlink:label="fmnb_RevenueFromContractWithCustomerTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Revenue from contract with customer.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="fmnb_RevenueFromContractWithCustomerTable" xlink:to="fmnb_RevenueFromContractWithCustomerTable_lbl" />
    <link:label xml:lang="en-US" xlink:label="fmnb_RevenueFromContractWithCustomerTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Revenue From Contract With Customer [Table]</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_RevenueFromContractWithCustomerTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Revenue From Contract With Customer [Table]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AccountingStandardsUpdate201409Member" xlink:type="locator" xlink:label="us-gaap_AccountingStandardsUpdate201409Member" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_AccountingStandardsUpdate201409Member_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">ASC 606</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AccountingStandardsUpdate201409Member" xlink:to="us-gaap_AccountingStandardsUpdate201409Member_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_AccountingStandardsUpdate201409Member_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Accounting Standards Update201409 [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_CounterpartyNameAxis" xlink:type="locator" xlink:label="srt_CounterpartyNameAxis" />
    <link:label xml:lang="en-US" xlink:label="srt_CounterpartyNameAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Counterparty Name</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="srt_CounterpartyNameAxis" xlink:to="srt_CounterpartyNameAxis_lbl" />
    <link:label xml:lang="en-US" xlink:label="srt_CounterpartyNameAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Counterparty Name [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_RepurchaseAgreementCounterpartyNameDomain" xlink:type="locator" xlink:label="srt_RepurchaseAgreementCounterpartyNameDomain" />
    <link:label xml:lang="en-US" xlink:label="srt_RepurchaseAgreementCounterpartyNameDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Counterparty Name</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="srt_RepurchaseAgreementCounterpartyNameDomain" xlink:to="srt_RepurchaseAgreementCounterpartyNameDomain_lbl" />
    <link:label xml:lang="en-US" xlink:label="srt_RepurchaseAgreementCounterpartyNameDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Repurchase Agreement Counterparty Name [Domain]</link:label>
    <link:loc xlink:href="fmnb-20201231.xsd#fmnb_CeteraMember" xlink:type="locator" xlink:label="fmnb_CeteraMember" />
    <link:label xml:lang="en-US" xlink:label="fmnb_CeteraMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Cetera.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="fmnb_CeteraMember" xlink:to="fmnb_CeteraMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="fmnb_CeteraMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Cetera</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_CeteraMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Cetera [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_RevenueFromContractWithCustomerLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Revenue From Contract With Customer [Line Items]</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_RevenueFromContractWithCustomerLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Revenue From Contract With Customer [Line Items]</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_ContingentFeesAndCommissionsDebitCardsReceivable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Contingent debit card interchange fees</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_ContingentFeesAndCommissionsDebitCardsReceivable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Contingent Fees And Commissions Debit Cards Receivable</link:label>
    <link:loc xlink:href="fmnb-20201231.xsd#fmnb_ContingentFeesAndCommissionsFiduciaryAndTrustActivitiesReceivable" xlink:type="locator" xlink:label="fmnb_ContingentFeesAndCommissionsFiduciaryAndTrustActivitiesReceivable" />
    <link:label xml:lang="en-US" xlink:label="fmnb_ContingentFeesAndCommissionsFiduciaryAndTrustActivitiesReceivable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Contingent fees and commissions fiduciary and trust activities receivable.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="fmnb_ContingentFeesAndCommissionsFiduciaryAndTrustActivitiesReceivable" xlink:to="fmnb_ContingentFeesAndCommissionsFiduciaryAndTrustActivitiesReceivable_lbl" />
    <link:label xml:lang="en-US" xlink:label="fmnb_ContingentFeesAndCommissionsFiduciaryAndTrustActivitiesReceivable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Contingent incentive fees</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_ContingentFeesAndCommissionsFiduciaryAndTrustActivitiesReceivable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Contingent Fees And Commissions Fiduciary And Trust Activities Receivable</link:label>
    <link:loc xlink:href="fmnb-20201231.xsd#fmnb_ContingentInsuranceCommissionsAndFeesReceivable" xlink:type="locator" xlink:label="fmnb_ContingentInsuranceCommissionsAndFeesReceivable" />
    <link:label xml:lang="en-US" xlink:label="fmnb_ContingentInsuranceCommissionsAndFeesReceivable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Contingent insurance commissions and fees receivable.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="fmnb_ContingentInsuranceCommissionsAndFeesReceivable" xlink:to="fmnb_ContingentInsuranceCommissionsAndFeesReceivable_lbl" />
    <link:label xml:lang="en-US" xlink:label="fmnb_ContingentInsuranceCommissionsAndFeesReceivable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Contingent commission</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_ContingentInsuranceCommissionsAndFeesReceivable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Contingent Insurance Commissions And Fees Receivable</link:label>
    <link:loc xlink:href="fmnb-20201231.xsd#fmnb_PercentageOfInsuranceCommissionsOnRevenues" xlink:type="locator" xlink:label="fmnb_PercentageOfInsuranceCommissionsOnRevenues" />
    <link:label xml:lang="en-US" xlink:label="fmnb_PercentageOfInsuranceCommissionsOnRevenues_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Percentage of insurance commissions on revenues.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="fmnb_PercentageOfInsuranceCommissionsOnRevenues" xlink:to="fmnb_PercentageOfInsuranceCommissionsOnRevenues_lbl" />
    <link:label xml:lang="en-US" xlink:label="fmnb_PercentageOfInsuranceCommissionsOnRevenues_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Percentage of insurance agency commissions representing total revenue</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_PercentageOfInsuranceCommissionsOnRevenues_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Percentage Of Insurance Commissions On Revenues</link:label>
    <link:loc xlink:href="fmnb-20201231.xsd#fmnb_PercentageOfRetirementPlanConsultingFeesOnRevenues" xlink:type="locator" xlink:label="fmnb_PercentageOfRetirementPlanConsultingFeesOnRevenues" />
    <link:label xml:lang="en-US" xlink:label="fmnb_PercentageOfRetirementPlanConsultingFeesOnRevenues_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Percentage of retirement plan consulting fees on revenues.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="fmnb_PercentageOfRetirementPlanConsultingFeesOnRevenues" xlink:to="fmnb_PercentageOfRetirementPlanConsultingFeesOnRevenues_lbl" />
    <link:label xml:lang="en-US" xlink:label="fmnb_PercentageOfRetirementPlanConsultingFeesOnRevenues_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Percentage of retirement plan consulting fees representing total revenue</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_PercentageOfRetirementPlanConsultingFeesOnRevenues_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Percentage Of Retirement Plan Consulting Fees On Revenues</link:label>
    <link:loc xlink:href="fmnb-20201231.xsd#fmnb_ContingentBrokerageCommissionsRevenuePayable" xlink:type="locator" xlink:label="fmnb_ContingentBrokerageCommissionsRevenuePayable" />
    <link:label xml:lang="en-US" xlink:label="fmnb_ContingentBrokerageCommissionsRevenuePayable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Contingent brokerage commissions revenue payable.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="fmnb_ContingentBrokerageCommissionsRevenuePayable" xlink:to="fmnb_ContingentBrokerageCommissionsRevenuePayable_lbl" />
    <link:loc xlink:href="fmnb-20201231.xsd#fmnb_PercentageOfInvestmentCommissionsOnRevenues" xlink:type="locator" xlink:label="fmnb_PercentageOfInvestmentCommissionsOnRevenues" />
    <link:label xml:lang="en-US" xlink:label="fmnb_PercentageOfInvestmentCommissionsOnRevenues_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Percentage of investment commissions on revenues.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="fmnb_PercentageOfInvestmentCommissionsOnRevenues" xlink:to="fmnb_PercentageOfInvestmentCommissionsOnRevenues_lbl" />
    <link:label xml:lang="en-US" xlink:label="fmnb_ContingentBrokerageCommissionsRevenuePayable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Contingent investment commissions to be refunded</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_ContingentBrokerageCommissionsRevenuePayable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Contingent Brokerage Commissions Revenue Payable</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_PercentageOfInvestmentCommissionsOnRevenues_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Percentage of investment commissions representing total revenue</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_PercentageOfInvestmentCommissionsOnRevenues_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Percentage Of Investment Commissions On Revenues</link:label>
    <link:loc xlink:href="fmnb-20201231.xsd#fmnb_MortgageLoanPortfoliosServicedForAbstract" xlink:type="locator" xlink:label="fmnb_MortgageLoanPortfoliosServicedForAbstract" />
    <link:label xml:lang="en-US" xlink:label="fmnb_MortgageLoanPortfoliosServicedForAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Mortgage loan portfolios serviced for.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="fmnb_MortgageLoanPortfoliosServicedForAbstract" xlink:to="fmnb_MortgageLoanPortfoliosServicedForAbstract_lbl" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ServicingLiabilitiesAtFairValueTable" xlink:type="locator" xlink:label="us-gaap_ServicingLiabilitiesAtFairValueTable" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ServicingLiabilitiesAtFairValueTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Servicing Liabilities At Fair Value [Table]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ServicingLiabilitiesAtFairValueTable" xlink:to="us-gaap_ServicingLiabilitiesAtFairValueTable_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ServicingLiabilitiesAtFairValueTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Servicing Liabilities At Fair Value [Table]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FederalHomeLoanMortgageCorporationFhlmcInsuredLoansMember" xlink:type="locator" xlink:label="us-gaap_FederalHomeLoanMortgageCorporationFhlmcInsuredLoansMember" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FederalHomeLoanMortgageCorporationFhlmcInsuredLoansMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">FHLMC</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FederalHomeLoanMortgageCorporationFhlmcInsuredLoansMember" xlink:to="us-gaap_FederalHomeLoanMortgageCorporationFhlmcInsuredLoansMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FederalHomeLoanMortgageCorporationFhlmcInsuredLoansMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Federal Home Loan Mortgage Corporation Fhlmc Insured Loans [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ServicingLiabilitiesAtFairValueLineItems" xlink:type="locator" xlink:label="us-gaap_ServicingLiabilitiesAtFairValueLineItems" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ServicingLiabilitiesAtFairValueLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Servicing Liabilities At Fair Value [Line Items]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ServicingLiabilitiesAtFairValueLineItems" xlink:to="us-gaap_ServicingLiabilitiesAtFairValueLineItems_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ServicingLiabilitiesAtFairValueLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Servicing Liabilities At Fair Value [Line Items]</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_AvailableForSaleSecuritiesDebtSecurities_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/positiveLabel">Securities available for sale</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_AvailableForSaleSecuritiesDebtAndEquity_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Total investment securities</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_AvailableForSaleSecuritiesDebtAndEquity_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Available For Sale Securities Debt And Equity</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DerivativeAssets" xlink:type="locator" xlink:label="us-gaap_DerivativeAssets" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DerivativeAssets_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Loan yield maintenance provisions</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DerivativeAssets" xlink:to="us-gaap_DerivativeAssets_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DerivativeAssets_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Derivative Assets</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FinancialInstrumentsFinancialLiabilitiesBalanceSheetGroupingsAbstract" xlink:type="locator" xlink:label="us-gaap_FinancialInstrumentsFinancialLiabilitiesBalanceSheetGroupingsAbstract" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FinancialInstrumentsFinancialLiabilitiesBalanceSheetGroupingsAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Financial Liabilities</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FinancialInstrumentsFinancialLiabilitiesBalanceSheetGroupingsAbstract" xlink:to="us-gaap_FinancialInstrumentsFinancialLiabilitiesBalanceSheetGroupingsAbstract_lbl" />
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DerivativeLiabilities" xlink:type="locator" xlink:label="us-gaap_DerivativeLiabilities" />
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    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DerivativeLiabilities" xlink:to="us-gaap_DerivativeLiabilities_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DerivativeLiabilities_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Derivative Liabilities</link:label>
    <link:loc xlink:href="fmnb-20201231.xsd#fmnb_FairValueAssetsAndLiabilitiesLevel1AndLevel2TransfersAmount" xlink:type="locator" xlink:label="fmnb_FairValueAssetsAndLiabilitiesLevel1AndLevel2TransfersAmount" />
    <link:label xml:lang="en-US" xlink:label="fmnb_FairValueAssetsAndLiabilitiesLevel1AndLevel2TransfersAmount_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Fair value assets liabilities level 1 and level 2 transfers amount.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="fmnb_FairValueAssetsAndLiabilitiesLevel1AndLevel2TransfersAmount" xlink:to="fmnb_FairValueAssetsAndLiabilitiesLevel1AndLevel2TransfersAmount_lbl" />
    <link:loc xlink:href="fmnb-20201231.xsd#fmnb_CollateralDependentImpairedLoansMember" xlink:type="locator" xlink:label="fmnb_CollateralDependentImpairedLoansMember" />
    <link:label xml:lang="en-US" xlink:label="fmnb_CollateralDependentImpairedLoansMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Collateral dependent impaired loans.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="fmnb_CollateralDependentImpairedLoansMember" xlink:to="fmnb_CollateralDependentImpairedLoansMember_lbl" />
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ValuationTechniqueAxis" xlink:type="locator" xlink:label="us-gaap_ValuationTechniqueAxis" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ValuationTechniqueAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Valuation Approach and Technique</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ValuationTechniqueAxis" xlink:to="us-gaap_ValuationTechniqueAxis_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ValuationTechniqueAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Valuation Technique [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ValuationTechniqueDomain" xlink:type="locator" xlink:label="us-gaap_ValuationTechniqueDomain" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ValuationTechniqueDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Valuation Approach and Technique</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ValuationTechniqueDomain" xlink:to="us-gaap_ValuationTechniqueDomain_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ValuationTechniqueDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Valuation Technique [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IncomeApproachValuationTechniqueMember" xlink:type="locator" xlink:label="us-gaap_IncomeApproachValuationTechniqueMember" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_IncomeApproachValuationTechniqueMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Measured Using Present Value of Cash Flows</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncomeApproachValuationTechniqueMember" xlink:to="us-gaap_IncomeApproachValuationTechniqueMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_IncomeApproachValuationTechniqueMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Income Approach Valuation Technique [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_FairValueAssetsAndLiabilitiesLevel1AndLevel2TransfersAmount_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Fair value assets liabilities transfers amount between level 1 and level 2</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_FairValueAssetsAndLiabilitiesLevel1AndLevel2TransfersAmount_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value Assets And Liabilities Level1 And Level2 Transfers Amount</link:label>
    <link:loc xlink:href="fmnb-20201231.xsd#fmnb_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetRepaymentsCallsAndMaturities" xlink:type="locator" xlink:label="fmnb_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetRepaymentsCallsAndMaturities" />
    <link:label xml:lang="en-US" xlink:label="fmnb_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetRepaymentsCallsAndMaturities_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Fair value measurement with unobservable inputs reconciliation recurring basis asset repayments calls and maturities.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="fmnb_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetRepaymentsCallsAndMaturities" xlink:to="fmnb_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetRepaymentsCallsAndMaturities_lbl" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationAbstract" xlink:type="locator" xlink:label="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationAbstract" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Reconciliation for all assets measured at fair value on a recurring basis using significant unobservable inputs</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationAbstract" xlink:to="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationAbstract_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue" xlink:type="locator" xlink:label="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Beginning Balance</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Value</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetRepaymentsCallsAndMaturities_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Repayments, calls and maturities</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetRepaymentsCallsAndMaturities_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Repayments Calls And Maturities</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchases" xlink:type="locator" xlink:label="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchases" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchases_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Acquired and/or purchased</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchases" xlink:to="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchases_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchases_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Purchases</link:label>
    <link:label xml:lang="en-US" xlink:label="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Ending Balance</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FairValueMeasurementsNonrecurringMember" xlink:type="locator" xlink:label="us-gaap_FairValueMeasurementsNonrecurringMember" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FairValueMeasurementsNonrecurringMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Fair Value, Measurements, Nonrecurring</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueMeasurementsNonrecurringMember" xlink:to="us-gaap_FairValueMeasurementsNonrecurringMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FairValueMeasurementsNonrecurringMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value Measurements Nonrecurring [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="us-gaap_ImpairedFinancingReceivableRecordedInvestment_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Recorded Investment</link:label>
    <link:loc xlink:href="fmnb-20201231.xsd#fmnb_ProvisionReversalForLoanLossesExpensed" xlink:type="locator" xlink:label="fmnb_ProvisionReversalForLoanLossesExpensed" />
    <link:label xml:lang="en-US" xlink:label="fmnb_ProvisionReversalForLoanLossesExpensed_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Provision (reversal) for loan losses expensed.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="fmnb_ProvisionReversalForLoanLossesExpensed" xlink:to="fmnb_ProvisionReversalForLoanLossesExpensed_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Impaired loans, unpaid principal balance with allowance recorded</link:label>
    <link:label xml:lang="en-US" xlink:label="us-gaap_ImpairedFinancingReceivableRelatedAllowance_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Impaired loans, allowance</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_ProvisionReversalForLoanLossesExpensed_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Provision for loan losses</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_ProvisionReversalForLoanLossesExpensed_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Provision Reversal For Loan Losses Expensed</link:label>
    <link:label xml:lang="en-US" xlink:label="us-gaap_FinancingReceivableModificationsRecordedInvestment_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/positiveLabel">Troubled debt restructurings</link:label>
    <link:loc xlink:href="fmnb-20201231.xsd#fmnb_OtherRealEstateOwnedMeasuredAtFairValueNet" xlink:type="locator" xlink:label="fmnb_OtherRealEstateOwnedMeasuredAtFairValueNet" />
    <link:label xml:lang="en-US" xlink:label="fmnb_OtherRealEstateOwnedMeasuredAtFairValueNet_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Other real estate owned measured at fair value net.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="fmnb_OtherRealEstateOwnedMeasuredAtFairValueNet" xlink:to="fmnb_OtherRealEstateOwnedMeasuredAtFairValueNet_lbl" />
    <link:loc xlink:href="fmnb-20201231.xsd#fmnb_WriteDownOfOtherRealEstateOwned" xlink:type="locator" xlink:label="fmnb_WriteDownOfOtherRealEstateOwned" />
    <link:label xml:lang="en-US" xlink:label="fmnb_WriteDownOfOtherRealEstateOwned_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Write down of other real estate owned.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="fmnb_WriteDownOfOtherRealEstateOwned" xlink:to="fmnb_WriteDownOfOtherRealEstateOwned_lbl" />
    <link:label xml:lang="en-US" xlink:label="fmnb_OtherRealEstateOwnedMeasuredAtFairValueNet_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Other real estate owned measured at fair value less costs to sell</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_OtherRealEstateOwnedMeasuredAtFairValueNet_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Other Real Estate Owned Measured At Fair Value Net</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_WriteDownOfOtherRealEstateOwned_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Write down of other real estate owned</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_WriteDownOfOtherRealEstateOwned_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Write Down Of Other Real Estate Owned</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_MarketApproachValuationTechniqueMember" xlink:type="locator" xlink:label="us-gaap_MarketApproachValuationTechniqueMember" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_MarketApproachValuationTechniqueMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Sales Comparison Valuation</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_MarketApproachValuationTechniqueMember" xlink:to="us-gaap_MarketApproachValuationTechniqueMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_MarketApproachValuationTechniqueMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Market Approach Valuation Technique [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_WeightedAverageMember" xlink:type="locator" xlink:label="srt_WeightedAverageMember" />
    <link:label xml:lang="en-US" xlink:label="srt_WeightedAverageMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Weighted Average</link:label>
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    <link:label xml:lang="en-US" xlink:label="srt_WeightedAverageMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Weighted Average [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_MeasurementInputTypeAxis" xlink:type="locator" xlink:label="us-gaap_MeasurementInputTypeAxis" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_MeasurementInputTypeAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Measurement Input Type</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_MeasurementInputTypeAxis" xlink:to="us-gaap_MeasurementInputTypeAxis_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_MeasurementInputTypeAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Measurement Input Type [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_MeasurementInputTypeDomain" xlink:type="locator" xlink:label="us-gaap_MeasurementInputTypeDomain" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_MeasurementInputTypeDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Measurement Input Type</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_MeasurementInputTypeDomain" xlink:to="us-gaap_MeasurementInputTypeDomain_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_MeasurementInputTypeDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Measurement Input Type [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_MeasurementInputComparabilityAdjustmentMember" xlink:type="locator" xlink:label="us-gaap_MeasurementInputComparabilityAdjustmentMember" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_MeasurementInputComparabilityAdjustmentMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Measurement Input Comparability Adjustment</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_MeasurementInputComparabilityAdjustmentMember" xlink:to="us-gaap_MeasurementInputComparabilityAdjustmentMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_MeasurementInputComparabilityAdjustmentMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Measurement Input Comparability Adjustment [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ImpairedFinancingReceivableRecordedInvestmentAbstract" xlink:type="locator" xlink:label="us-gaap_ImpairedFinancingReceivableRecordedInvestmentAbstract" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ImpairedFinancingReceivableRecordedInvestmentAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Fair value measurements for financial instruments</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ImpairedFinancingReceivableRecordedInvestmentAbstract" xlink:to="us-gaap_ImpairedFinancingReceivableRecordedInvestmentAbstract_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ImpairedFinancingReceivableRecordedInvestmentAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Impaired Financing Receivable Recorded Investment [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FairValueMeasurementsValuationProcessesDescription" xlink:type="locator" xlink:label="us-gaap_FairValueMeasurementsValuationProcessesDescription" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FairValueMeasurementsValuationProcessesDescription_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Fair Value Measurements Valuation Technique(s) Description</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueMeasurementsValuationProcessesDescription" xlink:to="us-gaap_FairValueMeasurementsValuationProcessesDescription_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FairValueMeasurementsValuationProcessesDescription_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value Measurements Valuation Processes Description</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AlternativeInvestmentMeasurementInput" xlink:type="locator" xlink:label="us-gaap_AlternativeInvestmentMeasurementInput" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_AlternativeInvestmentMeasurementInput_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Adjustment for differences between earning multiplier and comparable sales, Percent</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AlternativeInvestmentMeasurementInput" xlink:to="us-gaap_AlternativeInvestmentMeasurementInput_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_AlternativeInvestmentMeasurementInput_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Alternative Investment Measurement Input</link:label>
    <link:label xml:lang="en-US" xlink:label="us-gaap_FairValueInputsLevel1Member_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Level 1</link:label>
    <link:label xml:lang="en-US" xlink:label="us-gaap_FairValueInputsLevel2Member_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Level 2</link:label>
    <link:label xml:lang="en-US" xlink:label="us-gaap_FairValueInputsLevel3Member_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Level 3</link:label>
    <link:label xml:lang="en-US" xlink:label="us-gaap_FinancialInstrumentsFinancialAssetsBalanceSheetGroupingsAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Financial assets</link:label>
    <link:label xml:lang="en-US" xlink:label="us-gaap_CashCashEquivalentsAndFederalFundsSold_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Cash and cash equivalents, Carrying Amount</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueOutstanding" xlink:type="locator" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueOutstanding" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueOutstanding_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Restricted stock, Carrying Amount</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueOutstanding" xlink:to="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueOutstanding_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueOutstanding_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Sharebased Compensation Arrangement By Sharebased Payment Award Equity Instruments Other Than Options Aggregate Intrinsic Value Outstanding</link:label>
    <link:label xml:lang="en-US" xlink:label="us-gaap_LoansReceivableHeldForSaleNetNotPartOfDisposalGroup_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Loans held for sale, Carrying Amount</link:label>
    <link:label xml:lang="en-US" xlink:label="us-gaap_LoansAndLeasesReceivableNetReportedAmount_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Loans, net, Carrying Amount</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_InterestReceivable" xlink:type="locator" xlink:label="us-gaap_InterestReceivable" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_InterestReceivable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accrued interest receivable, Carrying Amount</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InterestReceivable" xlink:to="us-gaap_InterestReceivable_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_InterestReceivable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Interest Receivable</link:label>
    <link:label xml:lang="en-US" xlink:label="us-gaap_FinancialInstrumentsFinancialLiabilitiesBalanceSheetGroupingsAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Financial liabilities</link:label>
    <link:label xml:lang="en-US" xlink:label="us-gaap_Deposits_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Deposits, Carrying Amount</link:label>
    <link:label xml:lang="en-US" xlink:label="us-gaap_ShortTermBorrowings_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Short-term borrowings, Carrying Amount</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_InterestPayableCurrentAndNoncurrent" xlink:type="locator" xlink:label="us-gaap_InterestPayableCurrentAndNoncurrent" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_InterestPayableCurrentAndNoncurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accrued interest payable, Carrying Amount</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InterestPayableCurrentAndNoncurrent" xlink:to="us-gaap_InterestPayableCurrentAndNoncurrent_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_InterestPayableCurrentAndNoncurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Interest Payable Current And Noncurrent</link:label>
    <link:loc xlink:href="fmnb-20201231.xsd#fmnb_CashCashEquivalentsAndFederalFundsSoldFairValue" xlink:type="locator" xlink:label="fmnb_CashCashEquivalentsAndFederalFundsSoldFairValue" />
    <link:label xml:lang="en-US" xlink:label="fmnb_CashCashEquivalentsAndFederalFundsSoldFairValue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Cash cash equivalents and federal funds sold fair value.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="fmnb_CashCashEquivalentsAndFederalFundsSoldFairValue" xlink:to="fmnb_CashCashEquivalentsAndFederalFundsSoldFairValue_lbl" />
    <link:loc xlink:href="fmnb-20201231.xsd#fmnb_RestrictedStockFairValue" xlink:type="locator" xlink:label="fmnb_RestrictedStockFairValue" />
    <link:label xml:lang="en-US" xlink:label="fmnb_RestrictedStockFairValue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Restricted stock fair value.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="fmnb_RestrictedStockFairValue" xlink:to="fmnb_RestrictedStockFairValue_lbl" />
    <link:loc xlink:href="fmnb-20201231.xsd#fmnb_AccruedInterestReceivableFairValue" xlink:type="locator" xlink:label="fmnb_AccruedInterestReceivableFairValue" />
    <link:label xml:lang="en-US" xlink:label="fmnb_AccruedInterestReceivableFairValue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Accrued interest receivable fair value.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="fmnb_AccruedInterestReceivableFairValue" xlink:to="fmnb_AccruedInterestReceivableFairValue_lbl" />
    <link:loc xlink:href="fmnb-20201231.xsd#fmnb_AccruedInterestPayableFairValue" xlink:type="locator" xlink:label="fmnb_AccruedInterestPayableFairValue" />
    <link:label xml:lang="en-US" xlink:label="fmnb_AccruedInterestPayableFairValue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Accrued interest payable fair value.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="fmnb_AccruedInterestPayableFairValue" xlink:to="fmnb_AccruedInterestPayableFairValue_lbl" />
    <link:label xml:lang="en-US" xlink:label="fmnb_CashCashEquivalentsAndFederalFundsSoldFairValue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Cash and cash equivalents, Fair Value</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_CashCashEquivalentsAndFederalFundsSoldFairValue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Cash Cash Equivalents And Federal Funds Sold Fair Value</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_RestrictedStockFairValue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Restricted stock, Fair Value</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_RestrictedStockFairValue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Restricted Stock Fair Value</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LoansHeldForSaleFairValueDisclosure" xlink:type="locator" xlink:label="us-gaap_LoansHeldForSaleFairValueDisclosure" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LoansHeldForSaleFairValueDisclosure_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Loans held for sale, Fair Value</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LoansHeldForSaleFairValueDisclosure" xlink:to="us-gaap_LoansHeldForSaleFairValueDisclosure_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LoansHeldForSaleFairValueDisclosure_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Loans Held For Sale Fair Value Disclosure</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LoansReceivableFairValueDisclosure" xlink:type="locator" xlink:label="us-gaap_LoansReceivableFairValueDisclosure" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LoansReceivableFairValueDisclosure_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Loans, net, Fair Value</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LoansReceivableFairValueDisclosure" xlink:to="us-gaap_LoansReceivableFairValueDisclosure_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LoansReceivableFairValueDisclosure_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Loans Receivable Fair Value Disclosure</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_AccruedInterestReceivableFairValue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accrued interest receivable, Fair Value</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_AccruedInterestReceivableFairValue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Accrued Interest Receivable Fair Value</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DepositsFairValueDisclosure" xlink:type="locator" xlink:label="us-gaap_DepositsFairValueDisclosure" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DepositsFairValueDisclosure_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Deposits, Fair Value</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DepositsFairValueDisclosure" xlink:to="us-gaap_DepositsFairValueDisclosure_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DepositsFairValueDisclosure_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Deposits Fair Value Disclosure</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShorttermDebtFairValue" xlink:type="locator" xlink:label="us-gaap_ShorttermDebtFairValue" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ShorttermDebtFairValue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Short-term borrowings, Fair Value</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShorttermDebtFairValue" xlink:to="us-gaap_ShorttermDebtFairValue_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ShorttermDebtFairValue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Shortterm Debt Fair Value</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LongTermDebtFairValue" xlink:type="locator" xlink:label="us-gaap_LongTermDebtFairValue" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LongTermDebtFairValue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Long-term borrowings, Fair Value</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LongTermDebtFairValue" xlink:to="us-gaap_LongTermDebtFairValue_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LongTermDebtFairValue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Long Term Debt Fair Value</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_AccruedInterestPayableFairValue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accrued interest payable, Fair value</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_AccruedInterestPayableFairValue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Accrued Interest Payable Fair Value</link:label>
    <link:loc xlink:href="fmnb-20201231.xsd#fmnb_MaximumMaturityPeriodOfShortTermBorrowings" xlink:type="locator" xlink:label="fmnb_MaximumMaturityPeriodOfShortTermBorrowings" />
    <link:label xml:lang="en-US" xlink:label="fmnb_MaximumMaturityPeriodOfShortTermBorrowings_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Maximum maturity period of short term borrowings.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="fmnb_MaximumMaturityPeriodOfShortTermBorrowings" xlink:to="fmnb_MaximumMaturityPeriodOfShortTermBorrowings_lbl" />
    <link:label xml:lang="en-US" xlink:label="fmnb_MaximumMaturityPeriodOfShortTermBorrowings_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Maximum maturity period of short term borrowings</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_MaximumMaturityPeriodOfShortTermBorrowings_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Maximum Maturity Period Of Short Term Borrowings</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ScheduleOfPropertyPlantAndEquipmentTable" xlink:type="locator" xlink:label="us-gaap_ScheduleOfPropertyPlantAndEquipmentTable" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule Of Property Plant And Equipment [Table]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfPropertyPlantAndEquipmentTable" xlink:to="us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Schedule Of Property Plant And Equipment [Table]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LandMember" xlink:type="locator" xlink:label="us-gaap_LandMember" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LandMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Land</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LandMember" xlink:to="us-gaap_LandMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LandMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Land [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LeaseholdImprovementsMember" xlink:type="locator" xlink:label="us-gaap_LeaseholdImprovementsMember" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LeaseholdImprovementsMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Leasehold Improvements</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LeaseholdImprovementsMember" xlink:to="us-gaap_LeaseholdImprovementsMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LeaseholdImprovementsMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Leasehold Improvements [Member]</link:label>
    <link:loc xlink:href="fmnb-20201231.xsd#fmnb_RightOfUseAssetsMember" xlink:type="locator" xlink:label="fmnb_RightOfUseAssetsMember" />
    <link:label xml:lang="en-US" xlink:label="fmnb_RightOfUseAssetsMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Right of use assets.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="fmnb_RightOfUseAssetsMember" xlink:to="fmnb_RightOfUseAssetsMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="fmnb_RightOfUseAssetsMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Right of use assets</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_RightOfUseAssetsMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Right Of Use Assets [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PropertyPlantAndEquipmentLineItems" xlink:type="locator" xlink:label="us-gaap_PropertyPlantAndEquipmentLineItems" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_PropertyPlantAndEquipmentLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Property Plant And Equipment [Line Items]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PropertyPlantAndEquipmentLineItems" xlink:to="us-gaap_PropertyPlantAndEquipmentLineItems_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_PropertyPlantAndEquipmentLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Property Plant And Equipment [Line Items]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PropertyPlantAndEquipmentNetByTypeAbstract" xlink:type="locator" xlink:label="us-gaap_PropertyPlantAndEquipmentNetByTypeAbstract" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_PropertyPlantAndEquipmentNetByTypeAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Premises and equipment</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PropertyPlantAndEquipmentNetByTypeAbstract" xlink:to="us-gaap_PropertyPlantAndEquipmentNetByTypeAbstract_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_PropertyPlantAndEquipmentNetByTypeAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Property Plant And Equipment Net By Type [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PropertyPlantAndEquipmentGross" xlink:type="locator" xlink:label="us-gaap_PropertyPlantAndEquipmentGross" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_PropertyPlantAndEquipmentGross_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Premises and equipment, gross</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PropertyPlantAndEquipmentGross" xlink:to="us-gaap_PropertyPlantAndEquipmentGross_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_PropertyPlantAndEquipmentGross_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Property Plant And Equipment Gross</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment" xlink:type="locator" xlink:label="us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Less accumulated depreciation</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment" xlink:to="us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Accumulated Depreciation Depletion And Amortization Property Plant And Equipment</link:label>
    <link:label xml:lang="en-US" xlink:label="us-gaap_PropertyPlantAndEquipmentNet_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel">NET BOOK VALUE</link:label>
    <link:loc xlink:href="fmnb-20201231.xsd#fmnb_PremisesAndEquipmentTextualAbstract" xlink:type="locator" xlink:label="fmnb_PremisesAndEquipmentTextualAbstract" />
    <link:label xml:lang="en-US" xlink:label="fmnb_PremisesAndEquipmentTextualAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Premises and Equipment (Textual) [Abstract].</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="fmnb_PremisesAndEquipmentTextualAbstract" xlink:to="fmnb_PremisesAndEquipmentTextualAbstract_lbl" />
    <link:label xml:lang="en-US" xlink:label="fmnb_PremisesAndEquipmentTextualAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Premises and Equipment (Textual) [Abstract]</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_PremisesAndEquipmentTextualAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Premises And Equipment Textual [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DepreciationNonproduction" xlink:type="locator" xlink:label="us-gaap_DepreciationNonproduction" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DepreciationNonproduction_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Depreciation expense</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DepreciationNonproduction" xlink:to="us-gaap_DepreciationNonproduction_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DepreciationNonproduction_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Depreciation Nonproduction</link:label>
    <link:loc xlink:href="fmnb-20201231.xsd#fmnb_OperatingLeaseRightOfUseAssetGross" xlink:type="locator" xlink:label="fmnb_OperatingLeaseRightOfUseAssetGross" />
    <link:label xml:lang="en-US" xlink:label="fmnb_OperatingLeaseRightOfUseAssetGross_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Operating lease right-of-use asset gross.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="fmnb_OperatingLeaseRightOfUseAssetGross" xlink:to="fmnb_OperatingLeaseRightOfUseAssetGross_lbl" />
    <link:loc xlink:href="fmnb-20201231.xsd#fmnb_OperatingLeaseRightOfUseAssetAccumulatedAmortization" xlink:type="locator" xlink:label="fmnb_OperatingLeaseRightOfUseAssetAccumulatedAmortization" />
    <link:label xml:lang="en-US" xlink:label="fmnb_OperatingLeaseRightOfUseAssetAccumulatedAmortization_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Operating lease right-of-use asset accumulated amortization.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="fmnb_OperatingLeaseRightOfUseAssetAccumulatedAmortization" xlink:to="fmnb_OperatingLeaseRightOfUseAssetAccumulatedAmortization_lbl" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_EquipmentMember" xlink:type="locator" xlink:label="us-gaap_EquipmentMember" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_EquipmentMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Equipment</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_EquipmentMember" xlink:to="us-gaap_EquipmentMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_EquipmentMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Equipment [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_OperatingLeaseRightOfUseAssetGross_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Premises and equipment, gross</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_OperatingLeaseRightOfUseAssetGross_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Operating Lease Right Of Use Asset Gross</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_OperatingLeaseRightOfUseAssetAccumulatedAmortization_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Less: accumulated amortization</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_OperatingLeaseRightOfUseAssetAccumulatedAmortization_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Operating Lease Right Of Use Asset Accumulated Amortization</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OperatingLeaseRightOfUseAsset" xlink:type="locator" xlink:label="us-gaap_OperatingLeaseRightOfUseAsset" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_OperatingLeaseRightOfUseAsset_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel">TOTAL</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OperatingLeaseRightOfUseAsset" xlink:to="us-gaap_OperatingLeaseRightOfUseAsset_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_OperatingLeaseRightOfUseAsset_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Operating Lease Right Of Use Asset</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LesseeLeaseDescriptionTable" xlink:type="locator" xlink:label="us-gaap_LesseeLeaseDescriptionTable" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LesseeLeaseDescriptionTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Lessee Lease Description [Table]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LesseeLeaseDescriptionTable" xlink:to="us-gaap_LesseeLeaseDescriptionTable_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LesseeLeaseDescriptionTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Lessee Lease Description [Table]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LesseeLeaseDescriptionLineItems" xlink:type="locator" xlink:label="us-gaap_LesseeLeaseDescriptionLineItems" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LesseeLeaseDescriptionLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Lessee Lease Description [Line Items]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LesseeLeaseDescriptionLineItems" xlink:to="us-gaap_LesseeLeaseDescriptionLineItems_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LesseeLeaseDescriptionLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Lessee Lease Description [Line Items]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LesseeOperatingLeaseRemainingLeaseTerm" xlink:type="locator" xlink:label="us-gaap_LesseeOperatingLeaseRemainingLeaseTerm" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LesseeOperatingLeaseRemainingLeaseTerm_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Operating leases remaining lease terms</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LesseeOperatingLeaseRemainingLeaseTerm" xlink:to="us-gaap_LesseeOperatingLeaseRemainingLeaseTerm_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LesseeOperatingLeaseRemainingLeaseTerm_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Lessee Operating Lease Remaining Lease Term</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LesseeOperatingLeaseOptionToExtend" xlink:type="locator" xlink:label="us-gaap_LesseeOperatingLeaseOptionToExtend" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LesseeOperatingLeaseOptionToExtend_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Operating leases options to extend</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LesseeOperatingLeaseOptionToExtend" xlink:to="us-gaap_LesseeOperatingLeaseOptionToExtend_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LesseeOperatingLeaseOptionToExtend_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Lessee Operating Lease Option To Extend</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LesseeOperatingLeaseExistenceOfOptionToExtend" xlink:type="locator" xlink:label="us-gaap_LesseeOperatingLeaseExistenceOfOptionToExtend" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LesseeOperatingLeaseExistenceOfOptionToExtend_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Operating leases options to extend [true false]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LesseeOperatingLeaseExistenceOfOptionToExtend" xlink:to="us-gaap_LesseeOperatingLeaseExistenceOfOptionToExtend_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LesseeOperatingLeaseExistenceOfOptionToExtend_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Lessee Operating Lease Existence Of Option To Extend</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LesseeOperatingLeaseOptionToTerminate" xlink:type="locator" xlink:label="us-gaap_LesseeOperatingLeaseOptionToTerminate" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LesseeOperatingLeaseOptionToTerminate_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Operating leases options to terminate the lease</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LesseeOperatingLeaseOptionToTerminate" xlink:to="us-gaap_LesseeOperatingLeaseOptionToTerminate_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LesseeOperatingLeaseOptionToTerminate_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Lessee Operating Lease Option To Terminate</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LesseeOperatingLeaseDescription" xlink:type="locator" xlink:label="us-gaap_LesseeOperatingLeaseDescription" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LesseeOperatingLeaseDescription_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Operating lease, description</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LesseeOperatingLeaseDescription" xlink:to="us-gaap_LesseeOperatingLeaseDescription_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LesseeOperatingLeaseDescription_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Lessee Operating Lease Description</link:label>
    <link:label xml:lang="en-US" xlink:label="us-gaap_OperatingLeaseRightOfUseAsset_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Operating lease, right-of-use asset</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OperatingLeaseLiability" xlink:type="locator" xlink:label="us-gaap_OperatingLeaseLiability" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_OperatingLeaseLiability_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Operating lease, liability</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OperatingLeaseLiability" xlink:to="us-gaap_OperatingLeaseLiability_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_OperatingLeaseLiability_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Operating Lease Liability</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OperatingLeaseLiabilityStatementOfFinancialPositionExtensibleList" xlink:type="locator" xlink:label="us-gaap_OperatingLeaseLiabilityStatementOfFinancialPositionExtensibleList" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_OperatingLeaseLiabilityStatementOfFinancialPositionExtensibleList_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Operating Lease, Liability, Statement of Financial Position [Extensible List]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OperatingLeaseLiabilityStatementOfFinancialPositionExtensibleList" xlink:to="us-gaap_OperatingLeaseLiabilityStatementOfFinancialPositionExtensibleList_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_OperatingLeaseLiabilityStatementOfFinancialPositionExtensibleList_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Operating Lease Liability Statement Of Financial Position Extensible List</link:label>
    <link:loc xlink:href="fmnb-20201231.xsd#fmnb_OperatingLeaseAndFinancingLeaseWeightedAverageRemainingLeaseTerm" xlink:type="locator" xlink:label="fmnb_OperatingLeaseAndFinancingLeaseWeightedAverageRemainingLeaseTerm" />
    <link:label xml:lang="en-US" xlink:label="fmnb_OperatingLeaseAndFinancingLeaseWeightedAverageRemainingLeaseTerm_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Weighted average remaining lease term for operating lease and financing lease, in &apos;PnYnMnDTnHnMnS&apos; format, for example, &apos;P1Y5M13D&apos; represents reported fact of one year, five months, and thirteen days.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="fmnb_OperatingLeaseAndFinancingLeaseWeightedAverageRemainingLeaseTerm" xlink:to="fmnb_OperatingLeaseAndFinancingLeaseWeightedAverageRemainingLeaseTerm_lbl" />
    <link:loc xlink:href="fmnb-20201231.xsd#fmnb_LesseeOperatingLeaseAndFinancingLeaseDiscountRate" xlink:type="locator" xlink:label="fmnb_LesseeOperatingLeaseAndFinancingLeaseDiscountRate" />
    <link:label xml:lang="en-US" xlink:label="fmnb_LesseeOperatingLeaseAndFinancingLeaseDiscountRate_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Discount rate used by lessee to determine present value of operating lease and finacing lease payments.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="fmnb_LesseeOperatingLeaseAndFinancingLeaseDiscountRate" xlink:to="fmnb_LesseeOperatingLeaseAndFinancingLeaseDiscountRate_lbl" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OperatingLeasePayments" xlink:type="locator" xlink:label="us-gaap_OperatingLeasePayments" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_OperatingLeasePayments_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Operating lease, payments</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OperatingLeasePayments" xlink:to="us-gaap_OperatingLeasePayments_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_OperatingLeasePayments_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Operating Lease Payments</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FinanceLeaseInterestExpense" xlink:type="locator" xlink:label="us-gaap_FinanceLeaseInterestExpense" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FinanceLeaseInterestExpense_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Finance leases, interest expense</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FinanceLeaseInterestExpense" xlink:to="us-gaap_FinanceLeaseInterestExpense_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FinanceLeaseInterestExpense_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Finance Lease Interest Expense</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FinanceLeaseRightOfUseAssetAmortization" xlink:type="locator" xlink:label="us-gaap_FinanceLeaseRightOfUseAssetAmortization" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FinanceLeaseRightOfUseAssetAmortization_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Finance leases, amortization expense</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FinanceLeaseRightOfUseAssetAmortization" xlink:to="us-gaap_FinanceLeaseRightOfUseAssetAmortization_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FinanceLeaseRightOfUseAssetAmortization_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Finance Lease Right Of Use Asset Amortization</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_OperatingLeaseAndFinancingLeaseWeightedAverageRemainingLeaseTerm_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Weighted average remaining lease term</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_OperatingLeaseAndFinancingLeaseWeightedAverageRemainingLeaseTerm_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Operating Lease And Financing Lease Weighted Average Remaining Lease Term</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_LesseeOperatingLeaseAndFinancingLeaseDiscountRate_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Weighted-average discount rate</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_LesseeOperatingLeaseAndFinancingLeaseDiscountRate_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Lessee Operating Lease And Financing Lease Discount Rate</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths" xlink:type="locator" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2021</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths" xlink:to="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Lessee Operating Lease Liability Payments Due Next Twelve Months</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearTwo" xlink:type="locator" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearTwo" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearTwo_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2022</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearTwo" xlink:to="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearTwo_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearTwo_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Lessee Operating Lease Liability Payments Due Year Two</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearThree" xlink:type="locator" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearThree" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearThree_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2023</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearThree" xlink:to="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearThree_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearThree_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Lessee Operating Lease Liability Payments Due Year Three</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFour" xlink:type="locator" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFour" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFour_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2024</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFour" xlink:to="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFour_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFour_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Lessee Operating Lease Liability Payments Due Year Four</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFive" xlink:type="locator" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFive" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFive_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2025</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFive" xlink:to="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFive_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFive_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Lessee Operating Lease Liability Payments Due Year Five</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive" xlink:type="locator" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Thereafter</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive" xlink:to="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Lessee Operating Lease Liability Payments Due After Year Five</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue" xlink:type="locator" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total Payments</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue" xlink:to="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Lessee Operating Lease Liability Payments Due</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LesseeOperatingLeaseLiabilityUndiscountedExcessAmount" xlink:type="locator" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityUndiscountedExcessAmount" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityUndiscountedExcessAmount_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Less: Imputed Interest</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LesseeOperatingLeaseLiabilityUndiscountedExcessAmount" xlink:to="us-gaap_LesseeOperatingLeaseLiabilityUndiscountedExcessAmount_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityUndiscountedExcessAmount_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Lessee Operating Lease Liability Undiscounted Excess Amount</link:label>
    <link:label xml:lang="en-US" xlink:label="us-gaap_OperatingLeaseLiability_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Total</link:label>
    <link:label xml:lang="en-US" xlink:label="us-gaap_Goodwill_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/positiveVerboseLabel">Goodwill associated with the Company&apos;s purchase and other past acquisitions</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ScheduleOfAcquiredFiniteLivedIntangibleAssetByMajorClassTable" xlink:type="locator" xlink:label="us-gaap_ScheduleOfAcquiredFiniteLivedIntangibleAssetByMajorClassTable" />
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    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfAcquiredFiniteLivedIntangibleAssetByMajorClassTable" xlink:to="us-gaap_ScheduleOfAcquiredFiniteLivedIntangibleAssetByMajorClassTable_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ScheduleOfAcquiredFiniteLivedIntangibleAssetByMajorClassTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Schedule Of Acquired Finite Lived Intangible Asset By Major Class [Table]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_NoncompeteAgreementsMember" xlink:type="locator" xlink:label="us-gaap_NoncompeteAgreementsMember" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_NoncompeteAgreementsMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Non-compete contracts</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NoncompeteAgreementsMember" xlink:to="us-gaap_NoncompeteAgreementsMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_NoncompeteAgreementsMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Noncompete Agreements [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_TradeNamesMember" xlink:type="locator" xlink:label="us-gaap_TradeNamesMember" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_TradeNamesMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Trade Name</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_TradeNamesMember" xlink:to="us-gaap_TradeNamesMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_TradeNamesMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Trade Names [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AcquiredFiniteLivedIntangibleAssetsLineItems" xlink:type="locator" xlink:label="us-gaap_AcquiredFiniteLivedIntangibleAssetsLineItems" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_AcquiredFiniteLivedIntangibleAssetsLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Acquired Finite Lived Intangible Assets [Line Items]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AcquiredFiniteLivedIntangibleAssetsLineItems" xlink:to="us-gaap_AcquiredFiniteLivedIntangibleAssetsLineItems_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_AcquiredFiniteLivedIntangibleAssetsLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Acquired Finite Lived Intangible Assets [Line Items]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsNetAbstract" xlink:type="locator" xlink:label="us-gaap_FiniteLivedIntangibleAssetsNetAbstract" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FiniteLivedIntangibleAssetsNetAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Acquired intangible assets</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FiniteLivedIntangibleAssetsNetAbstract" xlink:to="us-gaap_FiniteLivedIntangibleAssetsNetAbstract_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FiniteLivedIntangibleAssetsNetAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Finite Lived Intangible Assets Net [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsGross" xlink:type="locator" xlink:label="us-gaap_FiniteLivedIntangibleAssetsGross" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FiniteLivedIntangibleAssetsGross_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Gross Carrying Amount</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FiniteLivedIntangibleAssetsGross" xlink:to="us-gaap_FiniteLivedIntangibleAssetsGross_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FiniteLivedIntangibleAssetsGross_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Finite Lived Intangible Assets Gross</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization" xlink:type="locator" xlink:label="us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Accumulated Amortization</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Finite Lived Intangible Assets Accumulated Amortization</link:label>
    <link:label xml:lang="en-US" xlink:label="us-gaap_AmortizationOfIntangibleAssets_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Aggregate intangible amortization expense</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsFutureAmortizationExpenseAbstract" xlink:type="locator" xlink:label="us-gaap_FiniteLivedIntangibleAssetsFutureAmortizationExpenseAbstract" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FiniteLivedIntangibleAssetsFutureAmortizationExpenseAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Finite Lived Intangible Assets Future Amortization Expense [Abstract]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FiniteLivedIntangibleAssetsFutureAmortizationExpenseAbstract" xlink:to="us-gaap_FiniteLivedIntangibleAssetsFutureAmortizationExpenseAbstract_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FiniteLivedIntangibleAssetsFutureAmortizationExpenseAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Finite Lived Intangible Assets Future Amortization Expense [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths" xlink:type="locator" xlink:label="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2021</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Finite Lived Intangible Assets Amortization Expense Next Twelve Months</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo" xlink:type="locator" xlink:label="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2022</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Finite Lived Intangible Assets Amortization Expense Year Two</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree" xlink:type="locator" xlink:label="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2023</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree" xlink:to="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Finite Lived Intangible Assets Amortization Expense Year Three</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour" xlink:type="locator" xlink:label="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2024</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Finite Lived Intangible Assets Amortization Expense Year Four</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive" xlink:type="locator" xlink:label="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2025</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Finite Lived Intangible Assets Amortization Expense Year Five</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive" xlink:type="locator" xlink:label="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Thereafter</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive" xlink:to="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Finite Lived Intangible Assets Amortization Expense After Year Five</link:label>
    <link:label xml:lang="en-US" xlink:label="us-gaap_FiniteLivedIntangibleAssetsNet_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel">TOTAL</link:label>
    <link:loc xlink:href="fmnb-20201231.xsd#fmnb_InterestBearingDepositsTextualAbstract" xlink:type="locator" xlink:label="fmnb_InterestBearingDepositsTextualAbstract" />
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    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="fmnb_InterestBearingDepositsTextualAbstract" xlink:to="fmnb_InterestBearingDepositsTextualAbstract_lbl" />
    <link:loc xlink:href="fmnb-20201231.xsd#fmnb_MinimumTimeDeposits" xlink:type="locator" xlink:label="fmnb_MinimumTimeDeposits" />
    <link:label xml:lang="en-US" xlink:label="fmnb_MinimumTimeDeposits_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Minimum time deposits.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="fmnb_MinimumTimeDeposits" xlink:to="fmnb_MinimumTimeDeposits_lbl" />
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    <link:label xml:lang="en-US" xlink:label="fmnb_InterestBearingDepositsTextualAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Interest Bearing Deposits Textual [Abstract]</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_MinimumTimeDeposits_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Minimum time deposits amount</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_MinimumTimeDeposits_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Minimum Time Deposits</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_TimeDeposits100000OrMore" xlink:type="locator" xlink:label="us-gaap_TimeDeposits100000OrMore" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_TimeDeposits100000OrMore_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Time deposits of $100 thousand or more</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_TimeDeposits100000OrMore" xlink:to="us-gaap_TimeDeposits100000OrMore_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_TimeDeposits100000OrMore_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Time Deposits100000 Or More</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ScheduleOfAssetsSoldUnderAgreementsToRepurchaseTable" xlink:type="locator" xlink:label="us-gaap_ScheduleOfAssetsSoldUnderAgreementsToRepurchaseTable" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ScheduleOfAssetsSoldUnderAgreementsToRepurchaseTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule Of Assets Sold Under Agreements To Repurchase [Table]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfAssetsSoldUnderAgreementsToRepurchaseTable" xlink:to="us-gaap_ScheduleOfAssetsSoldUnderAgreementsToRepurchaseTable_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ScheduleOfAssetsSoldUnderAgreementsToRepurchaseTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Schedule Of Assets Sold Under Agreements To Repurchase [Table]</link:label>
    <link:loc xlink:href="fmnb-20201231.xsd#fmnb_CertificatesOfDepositAndBrokeredTimeDepositsMember" xlink:type="locator" xlink:label="fmnb_CertificatesOfDepositAndBrokeredTimeDepositsMember" />
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    <link:label xml:lang="en-US" xlink:label="fmnb_CertificatesOfDepositAndBrokeredTimeDepositsMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Certificates of Deposit and Brokered Time Deposits</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_CertificatesOfDepositAndBrokeredTimeDepositsMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Certificates Of Deposit And Brokered Time Deposits [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AssetsSoldUnderAgreementsToRepurchaseLineItems" xlink:type="locator" xlink:label="us-gaap_AssetsSoldUnderAgreementsToRepurchaseLineItems" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_AssetsSoldUnderAgreementsToRepurchaseLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Assets Sold Under Agreements To Repurchase [Line Items]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AssetsSoldUnderAgreementsToRepurchaseLineItems" xlink:to="us-gaap_AssetsSoldUnderAgreementsToRepurchaseLineItems_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_AssetsSoldUnderAgreementsToRepurchaseLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Assets Sold Under Agreements To Repurchase [Line Items]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_TimeDepositsByMaturityAbstract" xlink:type="locator" xlink:label="us-gaap_TimeDepositsByMaturityAbstract" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_TimeDepositsByMaturityAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Summary of scheduled maturities of certificates of deposit</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_TimeDepositsByMaturityAbstract" xlink:to="us-gaap_TimeDepositsByMaturityAbstract_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_TimeDepositsByMaturityAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Time Deposits By Maturity [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_TimeDepositMaturitiesYearOne" xlink:type="locator" xlink:label="us-gaap_TimeDepositMaturitiesYearOne" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_TimeDepositMaturitiesYearOne_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2021</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_TimeDepositMaturitiesYearOne" xlink:to="us-gaap_TimeDepositMaturitiesYearOne_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_TimeDepositMaturitiesYearOne_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Time Deposit Maturities Year One</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_TimeDepositMaturitiesYearTwo" xlink:type="locator" xlink:label="us-gaap_TimeDepositMaturitiesYearTwo" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_TimeDepositMaturitiesYearTwo_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2022</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_TimeDepositMaturitiesYearTwo" xlink:to="us-gaap_TimeDepositMaturitiesYearTwo_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_TimeDepositMaturitiesYearTwo_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Time Deposit Maturities Year Two</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_TimeDepositMaturitiesYearThree" xlink:type="locator" xlink:label="us-gaap_TimeDepositMaturitiesYearThree" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_TimeDepositMaturitiesYearThree_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2023</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_TimeDepositMaturitiesYearThree" xlink:to="us-gaap_TimeDepositMaturitiesYearThree_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_TimeDepositMaturitiesYearThree_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Time Deposit Maturities Year Three</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_TimeDepositMaturitiesYearFour" xlink:type="locator" xlink:label="us-gaap_TimeDepositMaturitiesYearFour" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_TimeDepositMaturitiesYearFour_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2024</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_TimeDepositMaturitiesYearFour" xlink:to="us-gaap_TimeDepositMaturitiesYearFour_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_TimeDepositMaturitiesYearFour_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Time Deposit Maturities Year Four</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_TimeDepositMaturitiesYearFive" xlink:type="locator" xlink:label="us-gaap_TimeDepositMaturitiesYearFive" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_TimeDepositMaturitiesYearFive_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2025</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_TimeDepositMaturitiesYearFive" xlink:to="us-gaap_TimeDepositMaturitiesYearFive_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_TimeDepositMaturitiesYearFive_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Time Deposit Maturities Year Five</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_TimeDepositMaturitiesAfterYearFive" xlink:type="locator" xlink:label="us-gaap_TimeDepositMaturitiesAfterYearFive" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_TimeDepositMaturitiesAfterYearFive_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Thereafter</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_TimeDepositMaturitiesAfterYearFive" xlink:to="us-gaap_TimeDepositMaturitiesAfterYearFive_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_TimeDepositMaturitiesAfterYearFive_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Time Deposit Maturities After Year Five</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_TimeDeposits" xlink:type="locator" xlink:label="us-gaap_TimeDeposits" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_TimeDeposits_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel">TOTAL</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_TimeDeposits" xlink:to="us-gaap_TimeDeposits_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_TimeDeposits_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Time Deposits</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_InterestBearingDepositLiabilitiesDomesticByComponentAbstract" xlink:type="locator" xlink:label="us-gaap_InterestBearingDepositLiabilitiesDomesticByComponentAbstract" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_InterestBearingDepositLiabilitiesDomesticByComponentAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Summary of year-end interest bearing deposits</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InterestBearingDepositLiabilitiesDomesticByComponentAbstract" xlink:to="us-gaap_InterestBearingDepositLiabilitiesDomesticByComponentAbstract_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_InterestBearingDepositLiabilitiesDomesticByComponentAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Interest Bearing Deposit Liabilities Domestic By Component [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_InterestBearingDomesticDepositDemand" xlink:type="locator" xlink:label="us-gaap_InterestBearingDomesticDepositDemand" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_InterestBearingDomesticDepositDemand_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Demand</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InterestBearingDomesticDepositDemand" xlink:to="us-gaap_InterestBearingDomesticDepositDemand_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_InterestBearingDomesticDepositDemand_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Interest Bearing Domestic Deposit Demand</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_InterestBearingDomesticDepositMoneyMarket" xlink:type="locator" xlink:label="us-gaap_InterestBearingDomesticDepositMoneyMarket" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_InterestBearingDomesticDepositMoneyMarket_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Money market</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InterestBearingDomesticDepositMoneyMarket" xlink:to="us-gaap_InterestBearingDomesticDepositMoneyMarket_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_InterestBearingDomesticDepositMoneyMarket_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Interest Bearing Domestic Deposit Money Market</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_InterestBearingDomesticDepositSavings" xlink:type="locator" xlink:label="us-gaap_InterestBearingDomesticDepositSavings" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_InterestBearingDomesticDepositSavings_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Savings</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_InterestBearingDomesticDepositSavings_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Interest Bearing Domestic Deposit Savings</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_InterestBearingDomesticDepositBrokered_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Brokered time deposits</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_InterestBearingDomesticDepositBrokered_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Interest Bearing Domestic Deposit Brokered</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_InterestBearingDomesticDepositCertificatesOfDeposits" xlink:type="locator" xlink:label="us-gaap_InterestBearingDomesticDepositCertificatesOfDeposits" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_InterestBearingDomesticDepositCertificatesOfDeposits_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Certificates of deposit</link:label>
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_InterestBearingDepositLiabilitiesDomestic" xlink:type="locator" xlink:label="us-gaap_InterestBearingDepositLiabilitiesDomestic" />
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ScheduleOfShortTermDebtTable" xlink:type="locator" xlink:label="us-gaap_ScheduleOfShortTermDebtTable" />
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_USTreasuryAndGovernmentShorttermDebtSecuritiesMember" xlink:type="locator" xlink:label="us-gaap_USTreasuryAndGovernmentShorttermDebtSecuritiesMember" />
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CreditFacilityAxis" xlink:type="locator" xlink:label="us-gaap_CreditFacilityAxis" />
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CreditFacilityDomain" xlink:type="locator" xlink:label="us-gaap_CreditFacilityDomain" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_CreditFacilityDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Credit Facility</link:label>
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DomesticLineOfCreditMember" xlink:type="locator" xlink:label="us-gaap_DomesticLineOfCreditMember" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DomesticLineOfCreditMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Domestic Line of Credit</link:label>
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    <link:loc xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_ConsolidatedEntitiesAxis" xlink:type="locator" xlink:label="srt_ConsolidatedEntitiesAxis" />
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    <link:loc xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_ConsolidatedEntitiesDomain" xlink:type="locator" xlink:label="srt_ConsolidatedEntitiesDomain" />
    <link:label xml:lang="en-US" xlink:label="srt_ConsolidatedEntitiesDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Consolidated Entities</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="srt_ConsolidatedEntitiesDomain" xlink:to="srt_ConsolidatedEntitiesDomain_lbl" />
    <link:label xml:lang="en-US" xlink:label="srt_ConsolidatedEntitiesDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Consolidated Entities [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_ParentCompanyMember" xlink:type="locator" xlink:label="srt_ParentCompanyMember" />
    <link:label xml:lang="en-US" xlink:label="srt_ParentCompanyMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Farmers National Banc Corp</link:label>
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RevolvingCreditFacilityMember" xlink:type="locator" xlink:label="us-gaap_RevolvingCreditFacilityMember" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_RevolvingCreditFacilityMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Revolving Credit Facility</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RevolvingCreditFacilityMember" xlink:to="us-gaap_RevolvingCreditFacilityMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_RevolvingCreditFacilityMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Revolving Credit Facility [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LetterOfCreditMember" xlink:type="locator" xlink:label="us-gaap_LetterOfCreditMember" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LetterOfCreditMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Letter of Credit</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LetterOfCreditMember" xlink:to="us-gaap_LetterOfCreditMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LetterOfCreditMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Letter Of Credit [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LongtermDebtTypeAxis" xlink:type="locator" xlink:label="us-gaap_LongtermDebtTypeAxis" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LongtermDebtTypeAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Long-term Debt, Type</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_LongtermDebtTypeAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Longterm Debt Type [Axis]</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_LongtermDebtTypeDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Long-term Debt, Type</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_LongtermDebtTypeDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Longterm Debt Type [Domain]</link:label>
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AdvancesFromFederalHomeLoanBanks" xlink:type="locator" xlink:label="us-gaap_AdvancesFromFederalHomeLoanBanks" />
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    <link:loc xlink:href="fmnb-20201231.xsd#fmnb_FixedRateAdvancesMember" xlink:type="locator" xlink:label="fmnb_FixedRateAdvancesMember" />
    <link:label xml:lang="en-US" xlink:label="fmnb_FixedRateAdvancesMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Fixed rate advances.</link:label>
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    <link:loc xlink:href="fmnb-20201231.xsd#fmnb_PledgedSecuritiesPercentageOfRepurchaseAgreementBalances" xlink:type="locator" xlink:label="fmnb_PledgedSecuritiesPercentageOfRepurchaseAgreementBalances" />
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_SecuritiesSoldUnderAgreementsToRepurchase" xlink:type="locator" xlink:label="us-gaap_SecuritiesSoldUnderAgreementsToRepurchase" />
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    <link:loc xlink:href="fmnb-20201231.xsd#fmnb_MaturityPeriodOfRepurchaseAgreement" xlink:type="locator" xlink:label="fmnb_MaturityPeriodOfRepurchaseAgreement" />
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    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="fmnb_AssetsSoldUnderAgreementsToRepurchaseAverageInterestRateDuringYear" xlink:to="fmnb_AssetsSoldUnderAgreementsToRepurchaseAverageInterestRateDuringYear_lbl" />
    <link:loc xlink:href="fmnb-20201231.xsd#fmnb_AssetsSoldUnderAgreementsToRepurchaseMaximumMonthEndDuringYear" xlink:type="locator" xlink:label="fmnb_AssetsSoldUnderAgreementsToRepurchaseMaximumMonthEndDuringYear" />
    <link:label xml:lang="en-US" xlink:label="fmnb_AssetsSoldUnderAgreementsToRepurchaseMaximumMonthEndDuringYear_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Assets sold under agreements to repurchase maximum month end during year.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="fmnb_AssetsSoldUnderAgreementsToRepurchaseMaximumMonthEndDuringYear" xlink:to="fmnb_AssetsSoldUnderAgreementsToRepurchaseMaximumMonthEndDuringYear_lbl" />
    <link:loc xlink:href="fmnb-20201231.xsd#fmnb_AssetsSoldUnderAgreementsToRepurchaseWeightedAverageYearEndInterestRate" xlink:type="locator" xlink:label="fmnb_AssetsSoldUnderAgreementsToRepurchaseWeightedAverageYearEndInterestRate" />
    <link:label xml:lang="en-US" xlink:label="fmnb_AssetsSoldUnderAgreementsToRepurchaseWeightedAverageYearEndInterestRate_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Assets sold under agreements to repurchase weighted average year end interest rate.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="fmnb_AssetsSoldUnderAgreementsToRepurchaseWeightedAverageYearEndInterestRate" xlink:to="fmnb_AssetsSoldUnderAgreementsToRepurchaseWeightedAverageYearEndInterestRate_lbl" />
    <link:loc xlink:href="fmnb-20201231.xsd#fmnb_SummaryOfSecuritiesSoldUnderAgreementsToRepurchaseAbstract" xlink:type="locator" xlink:label="fmnb_SummaryOfSecuritiesSoldUnderAgreementsToRepurchaseAbstract" />
    <link:label xml:lang="en-US" xlink:label="fmnb_SummaryOfSecuritiesSoldUnderAgreementsToRepurchaseAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Summary of securities sold under agreements to repurchase.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="fmnb_SummaryOfSecuritiesSoldUnderAgreementsToRepurchaseAbstract" xlink:to="fmnb_SummaryOfSecuritiesSoldUnderAgreementsToRepurchaseAbstract_lbl" />
    <link:label xml:lang="en-US" xlink:label="fmnb_SummaryOfSecuritiesSoldUnderAgreementsToRepurchaseAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Summary of securities sold under agreements to repurchase</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_SummaryOfSecuritiesSoldUnderAgreementsToRepurchaseAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Summary Of Securities Sold Under Agreements To Repurchase [Abstract]</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_AssetsSoldUnderAgreementsToRepurchaseAverageDuringYear_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Average balance during the year</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_AssetsSoldUnderAgreementsToRepurchaseAverageDuringYear_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Assets Sold Under Agreements To Repurchase Average During Year</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_AssetsSoldUnderAgreementsToRepurchaseAverageInterestRateDuringYear_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Average interest rate during the year</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_AssetsSoldUnderAgreementsToRepurchaseAverageInterestRateDuringYear_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Assets Sold Under Agreements To Repurchase Average Interest Rate During Year</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_AssetsSoldUnderAgreementsToRepurchaseMaximumMonthEndDuringYear_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Maximum month-end balance during the year</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_AssetsSoldUnderAgreementsToRepurchaseMaximumMonthEndDuringYear_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Assets Sold Under Agreements To Repurchase Maximum Month End During Year</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_AssetsSoldUnderAgreementsToRepurchaseWeightedAverageYearEndInterestRate_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Weighted average year-end interest rate</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_AssetsSoldUnderAgreementsToRepurchaseWeightedAverageYearEndInterestRate_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Assets Sold Under Agreements To Repurchase Weighted Average Year End Interest Rate</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AssetsSoldUnderAgreementsToRepurchaseCarryingAmounts" xlink:type="locator" xlink:label="us-gaap_AssetsSoldUnderAgreementsToRepurchaseCarryingAmounts" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_AssetsSoldUnderAgreementsToRepurchaseCarryingAmounts_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Balance at year-end</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AssetsSoldUnderAgreementsToRepurchaseCarryingAmounts" xlink:to="us-gaap_AssetsSoldUnderAgreementsToRepurchaseCarryingAmounts_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_AssetsSoldUnderAgreementsToRepurchaseCarryingAmounts_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Assets Sold Under Agreements To Repurchase Carrying Amounts</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RepurchaseAgreementsMember" xlink:type="locator" xlink:label="us-gaap_RepurchaseAgreementsMember" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_RepurchaseAgreementsMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Repurchase agreement</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RepurchaseAgreementsMember" xlink:to="us-gaap_RepurchaseAgreementsMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_RepurchaseAgreementsMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Repurchase Agreements [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShortTermDebtTypeAxis" xlink:type="locator" xlink:label="us-gaap_ShortTermDebtTypeAxis" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ShortTermDebtTypeAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Short-term Debt, Type</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShortTermDebtTypeAxis" xlink:to="us-gaap_ShortTermDebtTypeAxis_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ShortTermDebtTypeAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Short Term Debt Type [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShortTermDebtTypeDomain" xlink:type="locator" xlink:label="us-gaap_ShortTermDebtTypeDomain" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ShortTermDebtTypeDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Short-term Debt, Type</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShortTermDebtTypeDomain" xlink:to="us-gaap_ShortTermDebtTypeDomain_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ShortTermDebtTypeDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Short Term Debt Type [Domain]</link:label>
    <link:label xml:lang="en-US" xlink:label="us-gaap_ShortTermBorrowings_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/positiveVerboseLabel">Total borrowings</link:label>
    <link:loc xlink:href="fmnb-20201231.xsd#fmnb_NumberOfDomesticBank" xlink:type="locator" xlink:label="fmnb_NumberOfDomesticBank" />
    <link:label xml:lang="en-US" xlink:label="fmnb_NumberOfDomesticBank_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Number of domestic bank.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="fmnb_NumberOfDomesticBank" xlink:to="fmnb_NumberOfDomesticBank_lbl" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity" xlink:type="locator" xlink:label="us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Access to lines of credit at domestic banks</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity" xlink:to="us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Line Of Credit Facility Maximum Borrowing Capacity</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_NumberOfDomesticBank_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Number of domestic banks</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_NumberOfDomesticBank_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Number Of Domestic Bank</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LineOfCredit" xlink:type="locator" xlink:label="us-gaap_LineOfCredit" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LineOfCredit_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Unsecured revolving line of credit, outstanding balance</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LineOfCredit" xlink:to="us-gaap_LineOfCredit_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LineOfCredit_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Line Of Credit</link:label>
    <link:loc xlink:href="fmnb-20201231.xsd#fmnb_SecuritiesSoldUnderAgreementsToRepurchaseAndOtherShortTermBorrowingsAdditionalTextualAbstract" xlink:type="locator" xlink:label="fmnb_SecuritiesSoldUnderAgreementsToRepurchaseAndOtherShortTermBorrowingsAdditionalTextualAbstract" />
    <link:label xml:lang="en-US" xlink:label="fmnb_SecuritiesSoldUnderAgreementsToRepurchaseAndOtherShortTermBorrowingsAdditionalTextualAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Securities Sold under Agreements to Repurchase and Other Short Term Borrowings (Additional Textual) [Abstract]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="fmnb_SecuritiesSoldUnderAgreementsToRepurchaseAndOtherShortTermBorrowingsAdditionalTextualAbstract" xlink:to="fmnb_SecuritiesSoldUnderAgreementsToRepurchaseAndOtherShortTermBorrowingsAdditionalTextualAbstract_lbl" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DebtInstrumentInterestRateStatedPercentage" xlink:type="locator" xlink:label="us-gaap_DebtInstrumentInterestRateStatedPercentage" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DebtInstrumentInterestRateStatedPercentage_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Debt Instrument, Interest Rate, Stated Percentage</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtInstrumentInterestRateStatedPercentage" xlink:to="us-gaap_DebtInstrumentInterestRateStatedPercentage_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DebtInstrumentInterestRateStatedPercentage_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument Interest Rate Stated Percentage</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_SecuritiesSoldUnderAgreementsToRepurchaseAndOtherShortTermBorrowingsAdditionalTextualAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Securities Sold under Agreements to Repurchase and Other Short Term Borrowings (Additional Textual) [Abstract]</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_SecuritiesSoldUnderAgreementsToRepurchaseAndOtherShortTermBorrowingsAdditionalTextualAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Securities Sold Under Agreements To Repurchase And Other Short Term Borrowings Additional Textual [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DebtInstrumentInterestRateEffectivePercentage" xlink:type="locator" xlink:label="us-gaap_DebtInstrumentInterestRateEffectivePercentage" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DebtInstrumentInterestRateEffectivePercentage_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Interest rate, effective percentage</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtInstrumentInterestRateEffectivePercentage" xlink:to="us-gaap_DebtInstrumentInterestRateEffectivePercentage_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DebtInstrumentInterestRateEffectivePercentage_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument Interest Rate Effective Percentage</link:label>
    <link:loc xlink:href="fmnb-20201231.xsd#fmnb_FederalHomeLoanBankAdvancesBranchOfFHLBAbstract" xlink:type="locator" xlink:label="fmnb_FederalHomeLoanBankAdvancesBranchOfFHLBAbstract" />
    <link:label xml:lang="en-US" xlink:label="fmnb_FederalHomeLoanBankAdvancesBranchOfFHLBAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Federal home loan bank advances branch of FHLB.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="fmnb_FederalHomeLoanBankAdvancesBranchOfFHLBAbstract" xlink:to="fmnb_FederalHomeLoanBankAdvancesBranchOfFHLBAbstract_lbl" />
    <link:loc xlink:href="fmnb-20201231.xsd#fmnb_NotFoundDuringMigrationDeprecatedConceptBankingAndThriftAbstract" xlink:type="locator" xlink:label="fmnb_NotFoundDuringMigrationDeprecatedConceptBankingAndThriftAbstract" />
    <link:label xml:lang="en-US" xlink:label="fmnb_NotFoundDuringMigrationDeprecatedConceptBankingAndThriftAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Not Found During Migration Deprecated Concept Banking And Thrift [Abstract]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="fmnb_NotFoundDuringMigrationDeprecatedConceptBankingAndThriftAbstract" xlink:to="fmnb_NotFoundDuringMigrationDeprecatedConceptBankingAndThriftAbstract_lbl" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FederalHomeLoanBankAdvancesTable" xlink:type="locator" xlink:label="us-gaap_FederalHomeLoanBankAdvancesTable" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FederalHomeLoanBankAdvancesTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Federal Home Loan Bank Advances [Table]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FederalHomeLoanBankAdvancesTable" xlink:to="us-gaap_FederalHomeLoanBankAdvancesTable_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FederalHomeLoanBankAdvancesTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Federal Home Loan Bank Advances [Table]</link:label>
    <link:loc xlink:href="fmnb-20201231.xsd#fmnb_FixedRateConstantPaymentAdvancesMember" xlink:type="locator" xlink:label="fmnb_FixedRateConstantPaymentAdvancesMember" />
    <link:label xml:lang="en-US" xlink:label="fmnb_FixedRateConstantPaymentAdvancesMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Fixed rate constant payment advances.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="fmnb_FixedRateConstantPaymentAdvancesMember" xlink:to="fmnb_FixedRateConstantPaymentAdvancesMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="fmnb_FixedRateConstantPaymentAdvancesMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Fixed-rate constant payment advances</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_FixedRateConstantPaymentAdvancesMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Fixed Rate Constant Payment Advances [Member]</link:label>
    <link:loc xlink:href="fmnb-20201231.xsd#fmnb_ConvertibleAndPutableFixedRateAdvanceMember" xlink:type="locator" xlink:label="fmnb_ConvertibleAndPutableFixedRateAdvanceMember" />
    <link:label xml:lang="en-US" xlink:label="fmnb_ConvertibleAndPutableFixedRateAdvanceMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Convertible and putable fixed-rate advance.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="fmnb_ConvertibleAndPutableFixedRateAdvanceMember" xlink:to="fmnb_ConvertibleAndPutableFixedRateAdvanceMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="fmnb_ConvertibleAndPutableFixedRateAdvanceMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Convertible and putable fixed-rate advance</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_ConvertibleAndPutableFixedRateAdvanceMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Convertible And Putable Fixed Rate Advance [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FederalHomeLoanBankAdvancesLineItems" xlink:type="locator" xlink:label="us-gaap_FederalHomeLoanBankAdvancesLineItems" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FederalHomeLoanBankAdvancesLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Federal Home Loan Bank Advances [Line Items]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FederalHomeLoanBankAdvancesLineItems" xlink:to="us-gaap_FederalHomeLoanBankAdvancesLineItems_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FederalHomeLoanBankAdvancesLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Federal Home Loan Bank Advances [Line Items]</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_FederalHomeLoanBankAdvancesBranchOfFHLBAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Summary of long-term advances from the Federal Home Loan Bank</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_FederalHomeLoanBankAdvancesBranchOfFHLBAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Federal Home Loan Bank Advances Branch Of F H L B [Abstract]</link:label>
    <link:loc xlink:href="fmnb-20201231.xsd#fmnb_AdditionalFederalHomeLoanBankAdvancesToBeBorrowUnderCollateralPledge" xlink:type="locator" xlink:label="fmnb_AdditionalFederalHomeLoanBankAdvancesToBeBorrowUnderCollateralPledge" />
    <link:label xml:lang="en-US" xlink:label="fmnb_AdditionalFederalHomeLoanBankAdvancesToBeBorrowUnderCollateralPledge_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Additional federal home loan bank advances to be borrow under collateral pledge.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="fmnb_AdditionalFederalHomeLoanBankAdvancesToBeBorrowUnderCollateralPledge" xlink:to="fmnb_AdditionalFederalHomeLoanBankAdvancesToBeBorrowUnderCollateralPledge_lbl" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DebtInstrumentTable" xlink:type="locator" xlink:label="us-gaap_DebtInstrumentTable" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DebtInstrumentTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Debt Instrument [Table]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtInstrumentTable" xlink:to="us-gaap_DebtInstrumentTable_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DebtInstrumentTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument [Table]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DebtInstrumentAxis" xlink:type="locator" xlink:label="us-gaap_DebtInstrumentAxis" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DebtInstrumentAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Debt Instrument</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtInstrumentAxis" xlink:to="us-gaap_DebtInstrumentAxis_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DebtInstrumentAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DebtInstrumentNameDomain" xlink:type="locator" xlink:label="us-gaap_DebtInstrumentNameDomain" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DebtInstrumentNameDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Debt Instrument, Name</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtInstrumentNameDomain" xlink:to="us-gaap_DebtInstrumentNameDomain_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DebtInstrumentNameDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument Name [Domain]</link:label>
    <link:loc xlink:href="fmnb-20201231.xsd#fmnb_TrustPreferredDebentureMember" xlink:type="locator" xlink:label="fmnb_TrustPreferredDebentureMember" />
    <link:label xml:lang="en-US" xlink:label="fmnb_TrustPreferredDebentureMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Trust preferred debenture.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="fmnb_TrustPreferredDebentureMember" xlink:to="fmnb_TrustPreferredDebentureMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="fmnb_TrustPreferredDebentureMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Trust Preferred Debenture</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_TrustPreferredDebentureMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Trust Preferred Debenture [Member]</link:label>
    <link:loc xlink:href="fmnb-20201231.xsd#fmnb_SpecialPurposeEntityOneMember" xlink:type="locator" xlink:label="fmnb_SpecialPurposeEntityOneMember" />
    <link:label xml:lang="en-US" xlink:label="fmnb_SpecialPurposeEntityOneMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Special purpose entity one.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="fmnb_SpecialPurposeEntityOneMember" xlink:to="fmnb_SpecialPurposeEntityOneMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="fmnb_SpecialPurposeEntityOneMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Special Purpose Entity One</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_SpecialPurposeEntityOneMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Special Purpose Entity One [Member]</link:label>
    <link:loc xlink:href="fmnb-20201231.xsd#fmnb_SpecialPurposeEntityTwoMember" xlink:type="locator" xlink:label="fmnb_SpecialPurposeEntityTwoMember" />
    <link:label xml:lang="en-US" xlink:label="fmnb_SpecialPurposeEntityTwoMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Special purpose entity two.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="fmnb_SpecialPurposeEntityTwoMember" xlink:to="fmnb_SpecialPurposeEntityTwoMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="fmnb_SpecialPurposeEntityTwoMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Special Purpose Entity Two</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_SpecialPurposeEntityTwoMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Special Purpose Entity Two [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DebtInstrumentLineItems" xlink:type="locator" xlink:label="us-gaap_DebtInstrumentLineItems" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DebtInstrumentLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Debt Instrument [Line Items]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtInstrumentLineItems" xlink:to="us-gaap_DebtInstrumentLineItems_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DebtInstrumentLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument [Line Items]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FederalHomeLoanBankAdvancesGeneralDebtObligationsDisclosuresCollateralPledged1" xlink:type="locator" xlink:label="us-gaap_FederalHomeLoanBankAdvancesGeneralDebtObligationsDisclosuresCollateralPledged1" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FederalHomeLoanBankAdvancesGeneralDebtObligationsDisclosuresCollateralPledged1_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Residential mortgage, commercial real estate, and multi-family loans</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FederalHomeLoanBankAdvancesGeneralDebtObligationsDisclosuresCollateralPledged1" xlink:to="us-gaap_FederalHomeLoanBankAdvancesGeneralDebtObligationsDisclosuresCollateralPledged1_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FederalHomeLoanBankAdvancesGeneralDebtObligationsDisclosuresCollateralPledged1_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Federal Home Loan Bank Advances General Debt Obligations Disclosures Collateral Pledged1</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_AdditionalFederalHomeLoanBankAdvancesToBeBorrowUnderCollateralPledge_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Additional borrowing limit</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_AdditionalFederalHomeLoanBankAdvancesToBeBorrowUnderCollateralPledge_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Additional Federal Home Loan Bank Advances To Be Borrow Under Collateral Pledge</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FederalHomeLoanBankAdvancesMaturitiesSummaryAbstract" xlink:type="locator" xlink:label="us-gaap_FederalHomeLoanBankAdvancesMaturitiesSummaryAbstract" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FederalHomeLoanBankAdvancesMaturitiesSummaryAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Maturing in:</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FederalHomeLoanBankAdvancesMaturitiesSummaryAbstract" xlink:to="us-gaap_FederalHomeLoanBankAdvancesMaturitiesSummaryAbstract_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FederalHomeLoanBankAdvancesMaturitiesSummaryAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Federal Home Loan Bank Advances Maturities Summary [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FederalHomeLoanBankAdvancesMaturitiesSummaryDueWithinOneYearOfBalanceSheetDate" xlink:type="locator" xlink:label="us-gaap_FederalHomeLoanBankAdvancesMaturitiesSummaryDueWithinOneYearOfBalanceSheetDate" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FederalHomeLoanBankAdvancesMaturitiesSummaryDueWithinOneYearOfBalanceSheetDate_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">2021</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FederalHomeLoanBankAdvancesMaturitiesSummaryDueWithinOneYearOfBalanceSheetDate" xlink:to="us-gaap_FederalHomeLoanBankAdvancesMaturitiesSummaryDueWithinOneYearOfBalanceSheetDate_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FederalHomeLoanBankAdvancesMaturitiesSummaryDueWithinOneYearOfBalanceSheetDate_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Federal Home Loan Bank Advances Maturities Summary Due Within One Year Of Balance Sheet Date</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FederalHomeLoanBankAdvancesMaturitiesSummaryDueFromOneToTwoYearsOfBalanceSheetDate" xlink:type="locator" xlink:label="us-gaap_FederalHomeLoanBankAdvancesMaturitiesSummaryDueFromOneToTwoYearsOfBalanceSheetDate" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FederalHomeLoanBankAdvancesMaturitiesSummaryDueFromOneToTwoYearsOfBalanceSheetDate_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2022</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FederalHomeLoanBankAdvancesMaturitiesSummaryDueFromOneToTwoYearsOfBalanceSheetDate" xlink:to="us-gaap_FederalHomeLoanBankAdvancesMaturitiesSummaryDueFromOneToTwoYearsOfBalanceSheetDate_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FederalHomeLoanBankAdvancesMaturitiesSummaryDueFromOneToTwoYearsOfBalanceSheetDate_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Federal Home Loan Bank Advances Maturities Summary Due From One To Two Years Of Balance Sheet Date</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FederalHomeLoanBankAdvancesMaturitiesSummaryDueFromTwoToThreeYearsOfBalanceSheetDate" xlink:type="locator" xlink:label="us-gaap_FederalHomeLoanBankAdvancesMaturitiesSummaryDueFromTwoToThreeYearsOfBalanceSheetDate" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FederalHomeLoanBankAdvancesMaturitiesSummaryDueFromTwoToThreeYearsOfBalanceSheetDate_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2023</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FederalHomeLoanBankAdvancesMaturitiesSummaryDueFromTwoToThreeYearsOfBalanceSheetDate" xlink:to="us-gaap_FederalHomeLoanBankAdvancesMaturitiesSummaryDueFromTwoToThreeYearsOfBalanceSheetDate_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FederalHomeLoanBankAdvancesMaturitiesSummaryDueFromTwoToThreeYearsOfBalanceSheetDate_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Federal Home Loan Bank Advances Maturities Summary Due From Two To Three Years Of Balance Sheet Date</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FederalHomeLoanBankAdvancesMaturitiesSummaryDueFromThreeToFourYearsOfBalanceSheetDate" xlink:type="locator" xlink:label="us-gaap_FederalHomeLoanBankAdvancesMaturitiesSummaryDueFromThreeToFourYearsOfBalanceSheetDate" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FederalHomeLoanBankAdvancesMaturitiesSummaryDueFromThreeToFourYearsOfBalanceSheetDate_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2024</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FederalHomeLoanBankAdvancesMaturitiesSummaryDueFromThreeToFourYearsOfBalanceSheetDate" xlink:to="us-gaap_FederalHomeLoanBankAdvancesMaturitiesSummaryDueFromThreeToFourYearsOfBalanceSheetDate_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FederalHomeLoanBankAdvancesMaturitiesSummaryDueFromThreeToFourYearsOfBalanceSheetDate_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Federal Home Loan Bank Advances Maturities Summary Due From Three To Four Years Of Balance Sheet Date</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FederalHomeLoanBankAdvancesMaturitiesSummaryDueFromFourToFiveYearsOfBalanceSheetDate" xlink:type="locator" xlink:label="us-gaap_FederalHomeLoanBankAdvancesMaturitiesSummaryDueFromFourToFiveYearsOfBalanceSheetDate" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FederalHomeLoanBankAdvancesMaturitiesSummaryDueFromFourToFiveYearsOfBalanceSheetDate_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2025</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FederalHomeLoanBankAdvancesMaturitiesSummaryDueFromFourToFiveYearsOfBalanceSheetDate" xlink:to="us-gaap_FederalHomeLoanBankAdvancesMaturitiesSummaryDueFromFourToFiveYearsOfBalanceSheetDate_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FederalHomeLoanBankAdvancesMaturitiesSummaryDueFromFourToFiveYearsOfBalanceSheetDate_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Federal Home Loan Bank Advances Maturities Summary Due From Four To Five Years Of Balance Sheet Date</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FederalHomeLoanBankAdvancesMaturitiesSummaryDueAfterFiveYearsOfBalanceSheetDate" xlink:type="locator" xlink:label="us-gaap_FederalHomeLoanBankAdvancesMaturitiesSummaryDueAfterFiveYearsOfBalanceSheetDate" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FederalHomeLoanBankAdvancesMaturitiesSummaryDueAfterFiveYearsOfBalanceSheetDate_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Thereafter</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FederalHomeLoanBankAdvancesMaturitiesSummaryDueAfterFiveYearsOfBalanceSheetDate" xlink:to="us-gaap_FederalHomeLoanBankAdvancesMaturitiesSummaryDueAfterFiveYearsOfBalanceSheetDate_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FederalHomeLoanBankAdvancesMaturitiesSummaryDueAfterFiveYearsOfBalanceSheetDate_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Federal Home Loan Bank Advances Maturities Summary Due After Five Years Of Balance Sheet Date</link:label>
    <link:label xml:lang="en-US" xlink:label="us-gaap_AdvancesFromFederalHomeLoanBanks_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel">TOTAL</link:label>
    <link:loc xlink:href="fmnb-20201231.xsd#fmnb_NumberOfSpecialPurposeEntities" xlink:type="locator" xlink:label="fmnb_NumberOfSpecialPurposeEntities" />
    <link:label xml:lang="en-US" xlink:label="fmnb_NumberOfSpecialPurposeEntities_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Number of special purpose entities.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="fmnb_NumberOfSpecialPurposeEntities" xlink:to="fmnb_NumberOfSpecialPurposeEntities_lbl" />
    <link:label xml:lang="en-US" xlink:label="fmnb_NumberOfSpecialPurposeEntities_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Number of special purpose entities</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_NumberOfSpecialPurposeEntities_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Number Of Special Purpose Entities</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LongTermInvestments" xlink:type="locator" xlink:label="us-gaap_LongTermInvestments" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LongTermInvestments_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Long-term investments</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LongTermInvestments" xlink:to="us-gaap_LongTermInvestments_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LongTermInvestments_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Long Term Investments</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LongTermDebtPercentageBearingVariableInterestRate" xlink:type="locator" xlink:label="us-gaap_LongTermDebtPercentageBearingVariableInterestRate" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LongTermDebtPercentageBearingVariableInterestRate_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Interest rate</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LongTermDebtPercentageBearingVariableInterestRate" xlink:to="us-gaap_LongTermDebtPercentageBearingVariableInterestRate_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LongTermDebtPercentageBearingVariableInterestRate_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Long Term Debt Percentage Bearing Variable Interest Rate</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DebtInstrumentFrequencyOfPeriodicPayment" xlink:type="locator" xlink:label="us-gaap_DebtInstrumentFrequencyOfPeriodicPayment" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DebtInstrumentFrequencyOfPeriodicPayment_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Debt interest rate payment description</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtInstrumentFrequencyOfPeriodicPayment" xlink:to="us-gaap_DebtInstrumentFrequencyOfPeriodicPayment_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DebtInstrumentFrequencyOfPeriodicPayment_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument Frequency Of Periodic Payment</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DebtInstrumentMaturityDate" xlink:type="locator" xlink:label="us-gaap_DebtInstrumentMaturityDate" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DebtInstrumentMaturityDate_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Debenture maturity date</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtInstrumentMaturityDate" xlink:to="us-gaap_DebtInstrumentMaturityDate_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DebtInstrumentMaturityDate_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument Maturity Date</link:label>
    <link:loc xlink:href="fmnb-20201231.xsd#fmnb_FairValueOffBalanceSheetRisksDisclosureInformationAbstract" xlink:type="locator" xlink:label="fmnb_FairValueOffBalanceSheetRisksDisclosureInformationAbstract" />
    <link:label xml:lang="en-US" xlink:label="fmnb_FairValueOffBalanceSheetRisksDisclosureInformationAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Fair value off balance sheet risks disclosure information.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="fmnb_FairValueOffBalanceSheetRisksDisclosureInformationAbstract" xlink:to="fmnb_FairValueOffBalanceSheetRisksDisclosureInformationAbstract_lbl" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ScheduleOfFairValueOffBalanceSheetRisksTable" xlink:type="locator" xlink:label="us-gaap_ScheduleOfFairValueOffBalanceSheetRisksTable" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ScheduleOfFairValueOffBalanceSheetRisksTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule Of Fair Value Off Balance Sheet Risks [Table]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfFairValueOffBalanceSheetRisksTable" xlink:to="us-gaap_ScheduleOfFairValueOffBalanceSheetRisksTable_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ScheduleOfFairValueOffBalanceSheetRisksTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Schedule Of Fair Value Off Balance Sheet Risks [Table]</link:label>
    <link:loc xlink:href="fmnb-20201231.xsd#fmnb_CommitmentsAndUnusedLinesOfCreditMember" xlink:type="locator" xlink:label="fmnb_CommitmentsAndUnusedLinesOfCreditMember" />
    <link:label xml:lang="en-US" xlink:label="fmnb_CommitmentsAndUnusedLinesOfCreditMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Commitments and unused lines of credit.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="fmnb_CommitmentsAndUnusedLinesOfCreditMember" xlink:to="fmnb_CommitmentsAndUnusedLinesOfCreditMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="fmnb_CommitmentsAndUnusedLinesOfCreditMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Commitments and Unused Lines of Credit</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_CommitmentsAndUnusedLinesOfCreditMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Commitments And Unused Lines Of Credit [Member]</link:label>
    <link:loc xlink:href="fmnb-20201231.xsd#fmnb_FixedRateMember" xlink:type="locator" xlink:label="fmnb_FixedRateMember" />
    <link:label xml:lang="en-US" xlink:label="fmnb_FixedRateMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Fixed rate.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="fmnb_FixedRateMember" xlink:to="fmnb_FixedRateMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="fmnb_FixedRateMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Fixed Rate</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_FixedRateMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Fixed Rate [Member]</link:label>
    <link:loc xlink:href="fmnb-20201231.xsd#fmnb_VariableRateMember" xlink:type="locator" xlink:label="fmnb_VariableRateMember" />
    <link:label xml:lang="en-US" xlink:label="fmnb_VariableRateMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Variable rate.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="fmnb_VariableRateMember" xlink:to="fmnb_VariableRateMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="fmnb_VariableRateMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Variable Rate</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_VariableRateMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Variable Rate [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FairValueOffBalanceSheetRisksDisclosureInformationLineItems" xlink:type="locator" xlink:label="us-gaap_FairValueOffBalanceSheetRisksDisclosureInformationLineItems" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FairValueOffBalanceSheetRisksDisclosureInformationLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Fair Value Off Balance Sheet Risks Disclosure Information [Line Items]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueOffBalanceSheetRisksDisclosureInformationLineItems" xlink:to="us-gaap_FairValueOffBalanceSheetRisksDisclosureInformationLineItems_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FairValueOffBalanceSheetRisksDisclosureInformationLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value Off Balance Sheet Risks Disclosure Information [Line Items]</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_FairValueOffBalanceSheetRisksDisclosureInformationAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">The contractual amounts of financial instruments with off-balance-sheet risk at year end</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_FairValueOffBalanceSheetRisksDisclosureInformationAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value Off Balance Sheet Risks Disclosure Information [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FairValueDisclosureOffbalanceSheetRisksAmountLiability" xlink:type="locator" xlink:label="us-gaap_FairValueDisclosureOffbalanceSheetRisksAmountLiability" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FairValueDisclosureOffbalanceSheetRisksAmountLiability_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Total contractual amounts of financial instruments with off-balance-sheet risk</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueDisclosureOffbalanceSheetRisksAmountLiability" xlink:to="us-gaap_FairValueDisclosureOffbalanceSheetRisksAmountLiability_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FairValueDisclosureOffbalanceSheetRisksAmountLiability_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value Disclosure Offbalance Sheet Risks Amount Liability</link:label>
    <link:loc xlink:href="fmnb-20201231.xsd#fmnb_CommitmentsAndContingentLiabilitiesAdditionalTextualAbstract" xlink:type="locator" xlink:label="fmnb_CommitmentsAndContingentLiabilitiesAdditionalTextualAbstract" />
    <link:label xml:lang="en-US" xlink:label="fmnb_CommitmentsAndContingentLiabilitiesAdditionalTextualAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Commitments and Contingent Liabilities (Additional Textual) [Abstract]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="fmnb_CommitmentsAndContingentLiabilitiesAdditionalTextualAbstract" xlink:to="fmnb_CommitmentsAndContingentLiabilitiesAdditionalTextualAbstract_lbl" />
    <link:loc xlink:href="fmnb-20201231.xsd#fmnb_MaximumCommitmentPeriodToMakeLoans" xlink:type="locator" xlink:label="fmnb_MaximumCommitmentPeriodToMakeLoans" />
    <link:label xml:lang="en-US" xlink:label="fmnb_MaximumCommitmentPeriodToMakeLoans_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Maximum commitment period to make loans.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="fmnb_MaximumCommitmentPeriodToMakeLoans" xlink:to="fmnb_MaximumCommitmentPeriodToMakeLoans_lbl" />
    <link:loc xlink:href="fmnb-20201231.xsd#fmnb_CommitmentsAndContingentLiabilitiesTextualAbstract" xlink:type="locator" xlink:label="fmnb_CommitmentsAndContingentLiabilitiesTextualAbstract" />
    <link:label xml:lang="en-US" xlink:label="fmnb_CommitmentsAndContingentLiabilitiesTextualAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Commitments and Contingent Liabilities (Textual) [Abstract]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="fmnb_CommitmentsAndContingentLiabilitiesTextualAbstract" xlink:to="fmnb_CommitmentsAndContingentLiabilitiesTextualAbstract_lbl" />
    <link:label xml:lang="en-US" xlink:label="fmnb_CommitmentsAndContingentLiabilitiesAdditionalTextualAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Commitments and Contingent Liabilities (Additional Textual) [Abstract]</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_CommitmentsAndContingentLiabilitiesAdditionalTextualAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Commitments And Contingent Liabilities Additional Textual [Abstract]</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_MaximumCommitmentPeriodToMakeLoans_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Maximum commitment period to make loans</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_MaximumCommitmentPeriodToMakeLoans_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Maximum Commitment Period To Make Loans</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_CommitmentsAndContingentLiabilitiesTextualAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Commitments and Contingent Liabilities (Textual) [Abstract]</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_CommitmentsAndContingentLiabilitiesTextualAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Commitments And Contingent Liabilities Textual [Abstract]</link:label>
    <link:loc xlink:href="fmnb-20201231.xsd#fmnb_StandbyLettersOfCreditContractualAmount" xlink:type="locator" xlink:label="fmnb_StandbyLettersOfCreditContractualAmount" />
    <link:label xml:lang="en-US" xlink:label="fmnb_StandbyLettersOfCreditContractualAmount_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Standby letters of credit contractual amount.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="fmnb_StandbyLettersOfCreditContractualAmount" xlink:to="fmnb_StandbyLettersOfCreditContractualAmount_lbl" />
    <link:label xml:lang="en-US" xlink:label="fmnb_StandbyLettersOfCreditContractualAmount_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Standby letters of credit contractual value</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_StandbyLettersOfCreditContractualAmount_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Standby Letters Of Credit Contractual Amount</link:label>
    <link:loc xlink:href="fmnb-20201231.xsd#fmnb_MaximumSubscriptionAmountCommittedInSBICInvestmentFunds" xlink:type="locator" xlink:label="fmnb_MaximumSubscriptionAmountCommittedInSBICInvestmentFunds" />
    <link:label xml:lang="en-US" xlink:label="fmnb_MaximumSubscriptionAmountCommittedInSBICInvestmentFunds_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Maximum subscription amount committed in SBIC investment funds.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="fmnb_MaximumSubscriptionAmountCommittedInSBICInvestmentFunds" xlink:to="fmnb_MaximumSubscriptionAmountCommittedInSBICInvestmentFunds_lbl" />
    <link:label xml:lang="en-US" xlink:label="fmnb_MaximumSubscriptionAmountCommittedInSBICInvestmentFunds_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Maximum subscription amount committed in SBIC investment funds</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_MaximumSubscriptionAmountCommittedInSBICInvestmentFunds_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Maximum Subscription Amount Committed In S B I C Investment Funds</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PaymentsToAcquireInvestments" xlink:type="locator" xlink:label="us-gaap_PaymentsToAcquireInvestments" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_PaymentsToAcquireInvestments_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Investment in SBIC funds</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PaymentsToAcquireInvestments" xlink:to="us-gaap_PaymentsToAcquireInvestments_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_PaymentsToAcquireInvestments_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Payments To Acquire Investments</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" xlink:type="locator" xlink:label="us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule Of Share Based Compensation Arrangements By Share Based Payment Award [Table]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" xlink:to="us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Schedule Of Share Based Compensation Arrangements By Share Based Payment Award [Table]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PlanNameAxis" xlink:type="locator" xlink:label="us-gaap_PlanNameAxis" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_PlanNameAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Plan Name</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PlanNameAxis" xlink:to="us-gaap_PlanNameAxis_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_PlanNameAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Plan Name [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PlanNameDomain" xlink:type="locator" xlink:label="us-gaap_PlanNameDomain" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_PlanNameDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Plan Name</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PlanNameDomain" xlink:to="us-gaap_PlanNameDomain_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_PlanNameDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Plan Name [Domain]</link:label>
    <link:loc xlink:href="fmnb-20201231.xsd#fmnb_TwoThousandAndSeventeenIncentivePlanMember" xlink:type="locator" xlink:label="fmnb_TwoThousandAndSeventeenIncentivePlanMember" />
    <link:label xml:lang="en-US" xlink:label="fmnb_TwoThousandAndSeventeenIncentivePlanMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Two thousand and seventeen incentive plan.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="fmnb_TwoThousandAndSeventeenIncentivePlanMember" xlink:to="fmnb_TwoThousandAndSeventeenIncentivePlanMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="fmnb_TwoThousandAndSeventeenIncentivePlanMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2017 Incentive Plan</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_TwoThousandAndSeventeenIncentivePlanMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Two Thousand And Seventeen Incentive Plan [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AwardTypeAxis" xlink:type="locator" xlink:label="us-gaap_AwardTypeAxis" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_AwardTypeAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Award Type</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AwardTypeAxis" xlink:to="us-gaap_AwardTypeAxis_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_AwardTypeAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Award Type [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:type="locator" xlink:label="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Award Type</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:to="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Share Based Compensation Arrangements By Share Based Payment Award Award Type And Plan Name [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RestrictedStockMember" xlink:type="locator" xlink:label="us-gaap_RestrictedStockMember" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_RestrictedStockMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Restricted Stock Awards</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RestrictedStockMember" xlink:to="us-gaap_RestrictedStockMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_RestrictedStockMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Restricted Stock [Member]</link:label>
    <link:loc xlink:href="fmnb-20201231.xsd#fmnb_TimeBasedRestrictedStockAwardsMember" xlink:type="locator" xlink:label="fmnb_TimeBasedRestrictedStockAwardsMember" />
    <link:label xml:lang="en-US" xlink:label="fmnb_TimeBasedRestrictedStockAwardsMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Time based award restricted stock awards.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="fmnb_TimeBasedRestrictedStockAwardsMember" xlink:to="fmnb_TimeBasedRestrictedStockAwardsMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="fmnb_TimeBasedRestrictedStockAwardsMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Time Based Restricted Stock Awards</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_TimeBasedRestrictedStockAwardsMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Time Based Restricted Stock Awards [Member]</link:label>
    <link:loc xlink:href="fmnb-20201231.xsd#fmnb_PerformanceBasedRestrictedStockAwardsMember" xlink:type="locator" xlink:label="fmnb_PerformanceBasedRestrictedStockAwardsMember" />
    <link:label xml:lang="en-US" xlink:label="fmnb_PerformanceBasedRestrictedStockAwardsMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Performance based restricted stock awards.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="fmnb_PerformanceBasedRestrictedStockAwardsMember" xlink:to="fmnb_PerformanceBasedRestrictedStockAwardsMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="fmnb_PerformanceBasedRestrictedStockAwardsMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Performance Based Restricted Stock Awards</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_PerformanceBasedRestrictedStockAwardsMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Performance Based Restricted Stock Awards [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:type="locator" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Share Based Compensation Arrangement By Share Based Payment Award [Line Items]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Share Based Compensation Arrangement By Share Based Payment Award [Line Items]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized" xlink:type="locator" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Maximum shares available under equity incentive plan</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Authorized</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod" xlink:type="locator" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Share awards granted under equity incentive plan</link:label>
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    <link:label xml:lang="en-US" xlink:label="fmnb_TierOneRiskBasedCapitalRequiredForCapitalAdequacyToRiskWeightedAssetsCapitalConservationBufferRatio_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Tier One Risk Based Capital Required For Capital Adequacy To Risk Weighted Assets Capital Conservation Buffer Ratio</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_CapitalRequiredForCapitalAdequacyToRiskWeightedAssetsCapitalConservationBufferRatio_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Total capital to risk-weighted assets, capital conservation buffer ratio</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_CapitalRequiredForCapitalAdequacyToRiskWeightedAssetsCapitalConservationBufferRatio_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Capital Required For Capital Adequacy To Risk Weighted Assets Capital Conservation Buffer Ratio</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_CapitalConservationBufferRatio_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Capital conservation buffer ratio</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_CapitalConservationBufferRatio_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Capital Conservation Buffer Ratio</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_CapitalConservationBufferAdditionalCapitalAmountRequired_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Capital conservation buffer, additional capital amount required</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_CapitalConservationBufferAdditionalCapitalAmountRequired_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Capital Conservation Buffer Additional Capital Amount Required</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_TierOneRiskBasedCommonCapitalRequiredForCapitalAdequacyToRiskWeightedAssets_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Minimum ratio of common equity tier 1 capital to risk-weighted assets</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_TierOneRiskBasedCommonCapitalRequiredForCapitalAdequacyToRiskWeightedAssets_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Tier One Risk Based Common Capital Required For Capital Adequacy To Risk Weighted Assets</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_TierOneRiskBasedCapitalRequiredForCapitalAdequacyToRiskWeightedAssets" xlink:type="locator" xlink:label="us-gaap_TierOneRiskBasedCapitalRequiredForCapitalAdequacyToRiskWeightedAssets" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_TierOneRiskBasedCapitalRequiredForCapitalAdequacyToRiskWeightedAssets_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Minimum ratio of tier 1 capital to risk-weighted assets</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_TierOneRiskBasedCapitalRequiredForCapitalAdequacyToRiskWeightedAssets" xlink:to="us-gaap_TierOneRiskBasedCapitalRequiredForCapitalAdequacyToRiskWeightedAssets_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_TierOneRiskBasedCapitalRequiredForCapitalAdequacyToRiskWeightedAssets_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Tier One Risk Based Capital Required For Capital Adequacy To Risk Weighted Assets</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CapitalRequiredForCapitalAdequacyToRiskWeightedAssets" xlink:type="locator" xlink:label="us-gaap_CapitalRequiredForCapitalAdequacyToRiskWeightedAssets" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_CapitalRequiredForCapitalAdequacyToRiskWeightedAssets_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Minimum ratio of total capital to risk-weighted assets</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CapitalRequiredForCapitalAdequacyToRiskWeightedAssets" xlink:to="us-gaap_CapitalRequiredForCapitalAdequacyToRiskWeightedAssets_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_CapitalRequiredForCapitalAdequacyToRiskWeightedAssets_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Capital Required For Capital Adequacy To Risk Weighted Assets</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_TierOneLeverageCapitalRequiredForCapitalAdequacyToAverageAssets" xlink:type="locator" xlink:label="us-gaap_TierOneLeverageCapitalRequiredForCapitalAdequacyToAverageAssets" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_TierOneLeverageCapitalRequiredForCapitalAdequacyToAverageAssets_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Minimum leverage ratio</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_TierOneLeverageCapitalRequiredForCapitalAdequacyToAverageAssets" xlink:to="us-gaap_TierOneLeverageCapitalRequiredForCapitalAdequacyToAverageAssets_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_TierOneLeverageCapitalRequiredForCapitalAdequacyToAverageAssets_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Tier One Leverage Capital Required For Capital Adequacy To Average Assets</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd#srt_MinimumNetCapitalRequiredForEntity1" xlink:type="locator" xlink:label="srt_MinimumNetCapitalRequiredForEntity1" />
    <link:label xml:lang="en-US" xlink:label="srt_MinimumNetCapitalRequiredForEntity1_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Minimum capital maintained by trust</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="srt_MinimumNetCapitalRequiredForEntity1" xlink:to="srt_MinimumNetCapitalRequiredForEntity1_lbl" />
    <link:label xml:lang="en-US" xlink:label="srt_MinimumNetCapitalRequiredForEntity1_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Minimum Net Capital Required For Entity1</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StatutoryAccountingPracticesStatutoryAmountAvailableForDividendPaymentsWithoutRegulatoryApproval" xlink:type="locator" xlink:label="us-gaap_StatutoryAccountingPracticesStatutoryAmountAvailableForDividendPaymentsWithoutRegulatoryApproval" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_StatutoryAccountingPracticesStatutoryAmountAvailableForDividendPaymentsWithoutRegulatoryApproval_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Dividends that can be declared without prior approval</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StatutoryAccountingPracticesStatutoryAmountAvailableForDividendPaymentsWithoutRegulatoryApproval" xlink:to="us-gaap_StatutoryAccountingPracticesStatutoryAmountAvailableForDividendPaymentsWithoutRegulatoryApproval_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_StatutoryAccountingPracticesStatutoryAmountAvailableForDividendPaymentsWithoutRegulatoryApproval_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Statutory Accounting Practices Statutory Amount Available For Dividend Payments Without Regulatory Approval</link:label>
    <link:loc xlink:href="fmnb-20201231.xsd#fmnb_TierOneCommonCapitalRatioAbstract" xlink:type="locator" xlink:label="fmnb_TierOneCommonCapitalRatioAbstract" />
    <link:label xml:lang="en-US" xlink:label="fmnb_TierOneCommonCapitalRatioAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Tier one common capital ratio</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="fmnb_TierOneCommonCapitalRatioAbstract" xlink:to="fmnb_TierOneCommonCapitalRatioAbstract_lbl" />
    <link:loc xlink:href="fmnb-20201231.xsd#fmnb_TierOneCommonCapital" xlink:type="locator" xlink:label="fmnb_TierOneCommonCapital" />
    <link:label xml:lang="en-US" xlink:label="fmnb_TierOneCommonCapital_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Tier one common capital.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="fmnb_TierOneCommonCapital" xlink:to="fmnb_TierOneCommonCapital_lbl" />
    <link:loc xlink:href="fmnb-20201231.xsd#fmnb_TierOneCommonCapitalRatio" xlink:type="locator" xlink:label="fmnb_TierOneCommonCapitalRatio" />
    <link:label xml:lang="en-US" xlink:label="fmnb_TierOneCommonCapitalRatio_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Tier one common capital ratio.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="fmnb_TierOneCommonCapitalRatio" xlink:to="fmnb_TierOneCommonCapitalRatio_lbl" />
    <link:loc xlink:href="fmnb-20201231.xsd#fmnb_TierOneRiskBasedCommonCapitalRequiredForCapitalAdequacy" xlink:type="locator" xlink:label="fmnb_TierOneRiskBasedCommonCapitalRequiredForCapitalAdequacy" />
    <link:label xml:lang="en-US" xlink:label="fmnb_TierOneRiskBasedCommonCapitalRequiredForCapitalAdequacy_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Tier one common capital required for capital adequacy.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="fmnb_TierOneRiskBasedCommonCapitalRequiredForCapitalAdequacy" xlink:to="fmnb_TierOneRiskBasedCommonCapitalRequiredForCapitalAdequacy_lbl" />
    <link:loc xlink:href="fmnb-20201231.xsd#fmnb_TierOneRiskBasedCommonCapitalRequiredToBeWellCapitalized" xlink:type="locator" xlink:label="fmnb_TierOneRiskBasedCommonCapitalRequiredToBeWellCapitalized" />
    <link:label xml:lang="en-US" xlink:label="fmnb_TierOneRiskBasedCommonCapitalRequiredToBeWellCapitalized_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Tier one risk based common capital required to be well capitalized.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="fmnb_TierOneRiskBasedCommonCapitalRequiredToBeWellCapitalized" xlink:to="fmnb_TierOneRiskBasedCommonCapitalRequiredToBeWellCapitalized_lbl" />
    <link:loc xlink:href="fmnb-20201231.xsd#fmnb_TierOneRiskBasedCommonCapitalRequiredToBeWellCapitalizedToRiskWeightedAssets" xlink:type="locator" xlink:label="fmnb_TierOneRiskBasedCommonCapitalRequiredToBeWellCapitalizedToRiskWeightedAssets" />
    <link:label xml:lang="en-US" xlink:label="fmnb_TierOneRiskBasedCommonCapitalRequiredToBeWellCapitalizedToRiskWeightedAssets_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Tier one common capital required to be well capitalized to risk weighted assets.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="fmnb_TierOneRiskBasedCommonCapitalRequiredToBeWellCapitalizedToRiskWeightedAssets" xlink:to="fmnb_TierOneRiskBasedCommonCapitalRequiredToBeWellCapitalizedToRiskWeightedAssets_lbl" />
    <link:label xml:lang="en-US" xlink:label="fmnb_TierOneCommonCapitalRatioAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Common equity tier 1 capital ratio</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_TierOneCommonCapitalRatioAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Tier One Common Capital Ratio [Abstract]</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_TierOneCommonCapital_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Actual, Amount</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_TierOneCommonCapital_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Tier One Common Capital</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_TierOneCommonCapitalRatio_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Actual, Ratio</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_TierOneCommonCapitalRatio_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Tier One Common Capital Ratio</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_TierOneRiskBasedCommonCapitalRequiredForCapitalAdequacy_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Requirement for Capital Adequacy Purposes, Amount</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_TierOneRiskBasedCommonCapitalRequiredForCapitalAdequacy_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Tier One Risk Based Common Capital Required For Capital Adequacy</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_TierOneRiskBasedCommonCapitalRequiredForCapitalAdequacyToRiskWeightedAssets_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Requirement for Capital Adequacy Purposes, Ratio</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_TierOneRiskBasedCommonCapitalRequiredToBeWellCapitalized_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">To be Well Capitalized Under Prompt Corrective Action Provisions, Amount</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_TierOneRiskBasedCommonCapitalRequiredToBeWellCapitalized_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Tier One Risk Based Common Capital Required To Be Well Capitalized</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_TierOneRiskBasedCommonCapitalRequiredToBeWellCapitalizedToRiskWeightedAssets_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">To be Well Capitalized Under Prompt Corrective Action Provisions, Ratio</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_TierOneRiskBasedCommonCapitalRequiredToBeWellCapitalizedToRiskWeightedAssets_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Tier One Risk Based Common Capital Required To Be Well Capitalized To Risk Weighted Assets</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CapitalAbstract" xlink:type="locator" xlink:label="us-gaap_CapitalAbstract" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_CapitalAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Total risk based capital ratio</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CapitalAbstract" xlink:to="us-gaap_CapitalAbstract_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_CapitalAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Capital [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_Capital" xlink:type="locator" xlink:label="us-gaap_Capital" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_Capital_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Actual, Amount</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_Capital" xlink:to="us-gaap_Capital_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_Capital_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Capital</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CapitalToRiskWeightedAssets" xlink:type="locator" xlink:label="us-gaap_CapitalToRiskWeightedAssets" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_CapitalToRiskWeightedAssets_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Actual, Ratio</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CapitalToRiskWeightedAssets" xlink:to="us-gaap_CapitalToRiskWeightedAssets_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_CapitalToRiskWeightedAssets_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Capital To Risk Weighted Assets</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CapitalRequiredForCapitalAdequacy" xlink:type="locator" xlink:label="us-gaap_CapitalRequiredForCapitalAdequacy" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_CapitalRequiredForCapitalAdequacy_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Requirement for Capital Adequacy Purposes, Amount</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CapitalRequiredForCapitalAdequacy" xlink:to="us-gaap_CapitalRequiredForCapitalAdequacy_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_CapitalRequiredForCapitalAdequacy_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Capital Required For Capital Adequacy</link:label>
    <link:label xml:lang="en-US" xlink:label="us-gaap_CapitalRequiredForCapitalAdequacyToRiskWeightedAssets_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Requirement for Capital Adequacy Purposes, Ratio</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CapitalRequiredToBeWellCapitalized" xlink:type="locator" xlink:label="us-gaap_CapitalRequiredToBeWellCapitalized" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_CapitalRequiredToBeWellCapitalized_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">To be Well Capitalized Under Prompt Corrective Action Provisions, Amount</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CapitalRequiredToBeWellCapitalized" xlink:to="us-gaap_CapitalRequiredToBeWellCapitalized_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_CapitalRequiredToBeWellCapitalized_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Capital Required To Be Well Capitalized</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CapitalRequiredToBeWellCapitalizedToRiskWeightedAssets" xlink:type="locator" xlink:label="us-gaap_CapitalRequiredToBeWellCapitalizedToRiskWeightedAssets" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_CapitalRequiredToBeWellCapitalizedToRiskWeightedAssets_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">To be Well Capitalized Under Prompt Corrective Action Provisions, Ratio</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CapitalRequiredToBeWellCapitalizedToRiskWeightedAssets" xlink:to="us-gaap_CapitalRequiredToBeWellCapitalizedToRiskWeightedAssets_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_CapitalRequiredToBeWellCapitalizedToRiskWeightedAssets_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Capital Required To Be Well Capitalized To Risk Weighted Assets</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_TierOneRiskBasedCapitalAbstract" xlink:type="locator" xlink:label="us-gaap_TierOneRiskBasedCapitalAbstract" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_TierOneRiskBasedCapitalAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Tier 1 risk based capital ratio</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_TierOneRiskBasedCapitalAbstract" xlink:to="us-gaap_TierOneRiskBasedCapitalAbstract_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_TierOneRiskBasedCapitalAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Tier One Risk Based Capital [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_TierOneRiskBasedCapital" xlink:type="locator" xlink:label="us-gaap_TierOneRiskBasedCapital" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_TierOneRiskBasedCapital_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Actual, Amount</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_TierOneRiskBasedCapital" xlink:to="us-gaap_TierOneRiskBasedCapital_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_TierOneRiskBasedCapital_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Tier One Risk Based Capital</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_TierOneRiskBasedCapitalToRiskWeightedAssets" xlink:type="locator" xlink:label="us-gaap_TierOneRiskBasedCapitalToRiskWeightedAssets" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_TierOneRiskBasedCapitalToRiskWeightedAssets_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Actual, Ratio</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_TierOneRiskBasedCapitalToRiskWeightedAssets" xlink:to="us-gaap_TierOneRiskBasedCapitalToRiskWeightedAssets_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_TierOneRiskBasedCapitalToRiskWeightedAssets_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Tier One Risk Based Capital To Risk Weighted Assets</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_TierOneRiskBasedCapitalRequiredForCapitalAdequacy" xlink:type="locator" xlink:label="us-gaap_TierOneRiskBasedCapitalRequiredForCapitalAdequacy" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_TierOneRiskBasedCapitalRequiredForCapitalAdequacy_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Requirement for Capital Adequacy Purposes, Amount</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_TierOneRiskBasedCapitalRequiredForCapitalAdequacy" xlink:to="us-gaap_TierOneRiskBasedCapitalRequiredForCapitalAdequacy_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_TierOneRiskBasedCapitalRequiredForCapitalAdequacy_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Tier One Risk Based Capital Required For Capital Adequacy</link:label>
    <link:label xml:lang="en-US" xlink:label="us-gaap_TierOneRiskBasedCapitalRequiredForCapitalAdequacyToRiskWeightedAssets_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Requirement for Capital Adequacy Purposes, Ratio</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_TierOneRiskBasedCapitalRequiredToBeWellCapitalized" xlink:type="locator" xlink:label="us-gaap_TierOneRiskBasedCapitalRequiredToBeWellCapitalized" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_TierOneRiskBasedCapitalRequiredToBeWellCapitalized_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">To be Well Capitalized Under Prompt Corrective Action Provisions, Amount</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_TierOneRiskBasedCapitalRequiredToBeWellCapitalized" xlink:to="us-gaap_TierOneRiskBasedCapitalRequiredToBeWellCapitalized_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_TierOneRiskBasedCapitalRequiredToBeWellCapitalized_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Tier One Risk Based Capital Required To Be Well Capitalized</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_TierOneRiskBasedCapitalRequiredToBeWellCapitalizedToRiskWeightedAssets" xlink:type="locator" xlink:label="us-gaap_TierOneRiskBasedCapitalRequiredToBeWellCapitalizedToRiskWeightedAssets" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_TierOneRiskBasedCapitalRequiredToBeWellCapitalizedToRiskWeightedAssets_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">To be Well Capitalized Under Prompt Corrective Action Provisions, Ratio</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_TierOneRiskBasedCapitalRequiredToBeWellCapitalizedToRiskWeightedAssets" xlink:to="us-gaap_TierOneRiskBasedCapitalRequiredToBeWellCapitalizedToRiskWeightedAssets_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_TierOneRiskBasedCapitalRequiredToBeWellCapitalizedToRiskWeightedAssets_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Tier One Risk Based Capital Required To Be Well Capitalized To Risk Weighted Assets</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_TierOneLeverageCapitalAbstract" xlink:type="locator" xlink:label="us-gaap_TierOneLeverageCapitalAbstract" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_TierOneLeverageCapitalAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Tier 1 leverage ratio</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_TierOneLeverageCapitalAbstract" xlink:to="us-gaap_TierOneLeverageCapitalAbstract_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_TierOneLeverageCapitalAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Tier One Leverage Capital [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_TierOneLeverageCapital" xlink:type="locator" xlink:label="us-gaap_TierOneLeverageCapital" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_TierOneLeverageCapital_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Actual, Amount</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_TierOneLeverageCapital" xlink:to="us-gaap_TierOneLeverageCapital_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_TierOneLeverageCapital_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Tier One Leverage Capital</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_TierOneLeverageCapitalToAverageAssets" xlink:type="locator" xlink:label="us-gaap_TierOneLeverageCapitalToAverageAssets" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_TierOneLeverageCapitalToAverageAssets_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Actual, Ratio</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_TierOneLeverageCapitalToAverageAssets" xlink:to="us-gaap_TierOneLeverageCapitalToAverageAssets_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_TierOneLeverageCapitalToAverageAssets_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Tier One Leverage Capital To Average Assets</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_TierOneLeverageCapitalRequiredForCapitalAdequacy" xlink:type="locator" xlink:label="us-gaap_TierOneLeverageCapitalRequiredForCapitalAdequacy" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_TierOneLeverageCapitalRequiredForCapitalAdequacy_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Requirement for Capital Adequacy Purposes, Amount</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_TierOneLeverageCapitalRequiredForCapitalAdequacy" xlink:to="us-gaap_TierOneLeverageCapitalRequiredForCapitalAdequacy_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_TierOneLeverageCapitalRequiredForCapitalAdequacy_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Tier One Leverage Capital Required For Capital Adequacy</link:label>
    <link:label xml:lang="en-US" xlink:label="us-gaap_TierOneLeverageCapitalRequiredForCapitalAdequacyToAverageAssets_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Requirement for Capital Adequacy Purposes, Ratio</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_TierOneLeverageCapitalRequiredToBeWellCapitalized" xlink:type="locator" xlink:label="us-gaap_TierOneLeverageCapitalRequiredToBeWellCapitalized" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_TierOneLeverageCapitalRequiredToBeWellCapitalized_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">To be Well Capitalized Under Prompt Corrective Action Provisions, Amount</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_TierOneLeverageCapitalRequiredToBeWellCapitalized" xlink:to="us-gaap_TierOneLeverageCapitalRequiredToBeWellCapitalized_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_TierOneLeverageCapitalRequiredToBeWellCapitalized_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Tier One Leverage Capital Required To Be Well Capitalized</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_TierOneLeverageCapitalRequiredToBeWellCapitalizedToAverageAssets" xlink:type="locator" xlink:label="us-gaap_TierOneLeverageCapitalRequiredToBeWellCapitalizedToAverageAssets" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_TierOneLeverageCapitalRequiredToBeWellCapitalizedToAverageAssets_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">To be Well Capitalized Under Prompt Corrective Action Provisions, Ratio</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_TierOneLeverageCapitalRequiredToBeWellCapitalizedToAverageAssets" xlink:to="us-gaap_TierOneLeverageCapitalRequiredToBeWellCapitalizedToAverageAssets_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_TierOneLeverageCapitalRequiredToBeWellCapitalizedToAverageAssets_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Tier One Leverage Capital Required To Be Well Capitalized To Average Assets</link:label>
    <link:loc xlink:href="fmnb-20201231.xsd#fmnb_MaximumCompletedServicePeriodForParticipationUnderSavingsPlan" xlink:type="locator" xlink:label="fmnb_MaximumCompletedServicePeriodForParticipationUnderSavingsPlan" />
    <link:label xml:lang="en-US" xlink:label="fmnb_MaximumCompletedServicePeriodForParticipationUnderSavingsPlan_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Maximum completed service period for participation under savings plan.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="fmnb_MaximumCompletedServicePeriodForParticipationUnderSavingsPlan" xlink:to="fmnb_MaximumCompletedServicePeriodForParticipationUnderSavingsPlan_lbl" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable" xlink:type="locator" xlink:label="us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule Of Defined Benefit Plans Disclosures [Table]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable" xlink:to="us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Schedule Of Defined Benefit Plans Disclosures [Table]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RetirementPlanTypeAxis" xlink:type="locator" xlink:label="us-gaap_RetirementPlanTypeAxis" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_RetirementPlanTypeAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Retirement Plan Type</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RetirementPlanTypeAxis" xlink:to="us-gaap_RetirementPlanTypeAxis_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_RetirementPlanTypeAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Retirement Plan Type [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RetirementPlanTypeDomain" xlink:type="locator" xlink:label="us-gaap_RetirementPlanTypeDomain" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_RetirementPlanTypeDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Retirement Plan Type</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RetirementPlanTypeDomain" xlink:to="us-gaap_RetirementPlanTypeDomain_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_RetirementPlanTypeDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Retirement Plan Type [Domain]</link:label>
    <link:loc xlink:href="fmnb-20201231.xsd#fmnb_RetirementSavingsPlanMember" xlink:type="locator" xlink:label="fmnb_RetirementSavingsPlanMember" />
    <link:label xml:lang="en-US" xlink:label="fmnb_RetirementSavingsPlanMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Retirement savings plan.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="fmnb_RetirementSavingsPlanMember" xlink:to="fmnb_RetirementSavingsPlanMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="fmnb_RetirementSavingsPlanMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Retirement Savings Plan</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_RetirementSavingsPlanMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Retirement Savings Plan [Member]</link:label>
    <link:loc xlink:href="fmnb-20201231.xsd#fmnb_ProfitSharingPlanMember" xlink:type="locator" xlink:label="fmnb_ProfitSharingPlanMember" />
    <link:label xml:lang="en-US" xlink:label="fmnb_ProfitSharingPlanMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Profit sharing plan.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="fmnb_ProfitSharingPlanMember" xlink:to="fmnb_ProfitSharingPlanMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="fmnb_ProfitSharingPlanMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Profit Sharing Plan</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_ProfitSharingPlanMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Profit Sharing Plan [Member]</link:label>
    <link:loc xlink:href="fmnb-20201231.xsd#fmnb_DeferredCompensationPlanMember" xlink:type="locator" xlink:label="fmnb_DeferredCompensationPlanMember" />
    <link:label xml:lang="en-US" xlink:label="fmnb_DeferredCompensationPlanMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Deferred compensation plan.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="fmnb_DeferredCompensationPlanMember" xlink:to="fmnb_DeferredCompensationPlanMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="fmnb_DeferredCompensationPlanMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Deferred Compensation Plan</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_DeferredCompensationPlanMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Deferred Compensation Plan [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DefinedBenefitPlanDisclosureLineItems" xlink:type="locator" xlink:label="us-gaap_DefinedBenefitPlanDisclosureLineItems" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DefinedBenefitPlanDisclosureLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Defined Benefit Plan Disclosure [Line Items]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DefinedBenefitPlanDisclosureLineItems" xlink:to="us-gaap_DefinedBenefitPlanDisclosureLineItems_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DefinedBenefitPlanDisclosureLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Defined Benefit Plan Disclosure [Line Items]</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_MaximumCompletedServicePeriodForParticipationUnderSavingsPlan_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Employees who have completed no days of service</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_MaximumCompletedServicePeriodForParticipationUnderSavingsPlan_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Maximum Completed Service Period For Participation Under Savings Plan</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DefinedContributionPlanEmployerMatchingContributionPercent" xlink:type="locator" xlink:label="us-gaap_DefinedContributionPlanEmployerMatchingContributionPercent" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DefinedContributionPlanEmployerMatchingContributionPercent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Percentage of the participants&apos; voluntary contributions of gross wages</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DefinedContributionPlanEmployerMatchingContributionPercent" xlink:to="us-gaap_DefinedContributionPlanEmployerMatchingContributionPercent_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DefinedContributionPlanEmployerMatchingContributionPercent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Defined Contribution Plan Employer Matching Contribution Percent</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DefinedContributionPlanEmployerMatchingContributionPercentOfMatch" xlink:type="locator" xlink:label="us-gaap_DefinedContributionPlanEmployerMatchingContributionPercentOfMatch" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DefinedContributionPlanEmployerMatchingContributionPercentOfMatch_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Percentage of matching contribution by company</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DefinedContributionPlanEmployerMatchingContributionPercentOfMatch" xlink:to="us-gaap_DefinedContributionPlanEmployerMatchingContributionPercentOfMatch_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DefinedContributionPlanEmployerMatchingContributionPercentOfMatch_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Defined Contribution Plan Employer Matching Contribution Percent Of Match</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PensionAndOtherPostretirementBenefitExpense" xlink:type="locator" xlink:label="us-gaap_PensionAndOtherPostretirementBenefitExpense" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_PensionAndOtherPostretirementBenefitExpense_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">(Benefit) expense under the plan</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PensionAndOtherPostretirementBenefitExpense" xlink:to="us-gaap_PensionAndOtherPostretirementBenefitExpense_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_PensionAndOtherPostretirementBenefitExpense_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Pension And Other Postretirement Benefit Expense</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DefinedContributionPlanMaximumAnnualContributionsPerEmployeePercent" xlink:type="locator" xlink:label="us-gaap_DefinedContributionPlanMaximumAnnualContributionsPerEmployeePercent" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DefinedContributionPlanMaximumAnnualContributionsPerEmployeePercent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Annual compensation for associates, Percent</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DefinedContributionPlanMaximumAnnualContributionsPerEmployeePercent" xlink:to="us-gaap_DefinedContributionPlanMaximumAnnualContributionsPerEmployeePercent_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DefinedContributionPlanMaximumAnnualContributionsPerEmployeePercent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Defined Contribution Plan Maximum Annual Contributions Per Employee Percent</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesCurrentAndNoncurrent" xlink:type="locator" xlink:label="us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesCurrentAndNoncurrent" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesCurrentAndNoncurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Liability under the Plan</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesCurrentAndNoncurrent" xlink:to="us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesCurrentAndNoncurrent_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesCurrentAndNoncurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Pension And Other Postretirement Defined Benefit Plans Liabilities Current And Noncurrent</link:label>
    <link:loc xlink:href="fmnb-20201231.xsd#fmnb_DirectorAgeForAnnualRetirementBenefitPlan" xlink:type="locator" xlink:label="fmnb_DirectorAgeForAnnualRetirementBenefitPlan" />
    <link:label xml:lang="en-US" xlink:label="fmnb_DirectorAgeForAnnualRetirementBenefitPlan_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Director age for annual retirement benefit plan.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="fmnb_DirectorAgeForAnnualRetirementBenefitPlan" xlink:to="fmnb_DirectorAgeForAnnualRetirementBenefitPlan_lbl" />
    <link:loc xlink:href="fmnb-20201231.xsd#fmnb_PensionAndOtherPostretirementMaximumYearsForBenefitPayment" xlink:type="locator" xlink:label="fmnb_PensionAndOtherPostretirementMaximumYearsForBenefitPayment" />
    <link:label xml:lang="en-US" xlink:label="fmnb_PensionAndOtherPostretirementMaximumYearsForBenefitPayment_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Pension and other postretirement maximum years for benefit payment.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="fmnb_PensionAndOtherPostretirementMaximumYearsForBenefitPayment" xlink:to="fmnb_PensionAndOtherPostretirementMaximumYearsForBenefitPayment_lbl" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DeferredCompensationPlanAssets" xlink:type="locator" xlink:label="us-gaap_DeferredCompensationPlanAssets" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DeferredCompensationPlanAssets_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Deferred compensation plan asset recorded</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DeferredCompensationPlanAssets" xlink:to="us-gaap_DeferredCompensationPlanAssets_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DeferredCompensationPlanAssets_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Deferred Compensation Plan Assets</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DeferredCompensationArrangementWithIndividualRecordedLiability" xlink:type="locator" xlink:label="us-gaap_DeferredCompensationArrangementWithIndividualRecordedLiability" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DeferredCompensationArrangementWithIndividualRecordedLiability_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Deferred compensation plan liability recorded</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DeferredCompensationArrangementWithIndividualRecordedLiability" xlink:to="us-gaap_DeferredCompensationArrangementWithIndividualRecordedLiability_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DeferredCompensationArrangementWithIndividualRecordedLiability_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Deferred Compensation Arrangement With Individual Recorded Liability</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_DirectorAgeForAnnualRetirementBenefitPlan_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Director age for eligibility for annual retirement benefit plan</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_DirectorAgeForAnnualRetirementBenefitPlan_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Director Age For Annual Retirement Benefit Plan</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_PensionAndOtherPostretirementMaximumYearsForBenefitPayment_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Maximum years for benefit payment under the plan</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_PensionAndOtherPostretirementMaximumYearsForBenefitPayment_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Pension And Other Postretirement Maximum Years For Benefit Payment</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IncomeTaxExpenseBenefitContinuingOperationsAbstract" xlink:type="locator" xlink:label="us-gaap_IncomeTaxExpenseBenefitContinuingOperationsAbstract" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_IncomeTaxExpenseBenefitContinuingOperationsAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Provision for income taxes (credit)</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncomeTaxExpenseBenefitContinuingOperationsAbstract" xlink:to="us-gaap_IncomeTaxExpenseBenefitContinuingOperationsAbstract_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_IncomeTaxExpenseBenefitContinuingOperationsAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Income Tax Expense Benefit Continuing Operations [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CurrentIncomeTaxExpenseBenefit" xlink:type="locator" xlink:label="us-gaap_CurrentIncomeTaxExpenseBenefit" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_CurrentIncomeTaxExpenseBenefit_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Current expense</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CurrentIncomeTaxExpenseBenefit" xlink:to="us-gaap_CurrentIncomeTaxExpenseBenefit_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_CurrentIncomeTaxExpenseBenefit_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Current Income Tax Expense Benefit</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DeferredIncomeTaxExpenseBenefit" xlink:type="locator" xlink:label="us-gaap_DeferredIncomeTaxExpenseBenefit" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DeferredIncomeTaxExpenseBenefit_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Deferred expense (benefit)</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DeferredIncomeTaxExpenseBenefit" xlink:to="us-gaap_DeferredIncomeTaxExpenseBenefit_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DeferredIncomeTaxExpenseBenefit_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Deferred Income Tax Expense Benefit</link:label>
    <link:label xml:lang="en-US" xlink:label="us-gaap_IncomeTaxExpenseBenefit_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel">TOTALS</link:label>
    <link:loc xlink:href="fmnb-20201231.xsd#fmnb_IncomeTaxesTextualAbstract" xlink:type="locator" xlink:label="fmnb_IncomeTaxesTextualAbstract" />
    <link:label xml:lang="en-US" xlink:label="fmnb_IncomeTaxesTextualAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Income Taxes (Textual) [Abstract]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="fmnb_IncomeTaxesTextualAbstract" xlink:to="fmnb_IncomeTaxesTextualAbstract_lbl" />
    <link:loc xlink:href="fmnb-20201231.xsd#fmnb_IncomeTaxLineItems" xlink:type="locator" xlink:label="fmnb_IncomeTaxLineItems" />
    <link:label xml:lang="en-US" xlink:label="fmnb_IncomeTaxLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Income tax.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="fmnb_IncomeTaxLineItems" xlink:to="fmnb_IncomeTaxLineItems_lbl" />
    <link:loc xlink:href="fmnb-20201231.xsd#fmnb_IncomeTaxTable" xlink:type="locator" xlink:label="fmnb_IncomeTaxTable" />
    <link:label xml:lang="en-US" xlink:label="fmnb_IncomeTaxTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Income tax.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="fmnb_IncomeTaxTable" xlink:to="fmnb_IncomeTaxTable_lbl" />
    <link:label xml:lang="en-US" xlink:label="fmnb_IncomeTaxTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Income Tax [Table]</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_IncomeTaxTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Income Tax [Table]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_TaxPeriodAxis" xlink:type="locator" xlink:label="us-gaap_TaxPeriodAxis" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_TaxPeriodAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Tax Period</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_TaxPeriodAxis" xlink:to="us-gaap_TaxPeriodAxis_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_TaxPeriodAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Tax Period [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_TaxPeriodDomain" xlink:type="locator" xlink:label="us-gaap_TaxPeriodDomain" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_TaxPeriodDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Tax Period</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_TaxPeriodDomain" xlink:to="us-gaap_TaxPeriodDomain_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_TaxPeriodDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Tax Period [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_EarliestTaxYearMember" xlink:type="locator" xlink:label="us-gaap_EarliestTaxYearMember" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_EarliestTaxYearMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Earliest Tax Year</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_EarliestTaxYearMember" xlink:to="us-gaap_EarliestTaxYearMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_EarliestTaxYearMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Earliest Tax Year [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LatestTaxYearMember" xlink:type="locator" xlink:label="us-gaap_LatestTaxYearMember" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LatestTaxYearMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Latest Tax Year</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LatestTaxYearMember" xlink:to="us-gaap_LatestTaxYearMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LatestTaxYearMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Latest Tax Year [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_IncomeTaxLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Income Tax [Line Items]</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_IncomeTaxLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Income Tax [Line Items]</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_IncomeTaxesTextualAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Income Taxes (Textual) [Abstract]</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_IncomeTaxesTextualAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Income Taxes Textual [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate" xlink:type="locator" xlink:label="us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Federal statutory income tax rate</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate" xlink:to="us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IncomeTaxExpenseBenefitContinuingOperationsIncomeTaxReconciliationAbstract" xlink:type="locator" xlink:label="us-gaap_IncomeTaxExpenseBenefitContinuingOperationsIncomeTaxReconciliationAbstract" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_IncomeTaxExpenseBenefitContinuingOperationsIncomeTaxReconciliationAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Effective Income Tax Rate Reconciliation, Amount [Abstract]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncomeTaxExpenseBenefitContinuingOperationsIncomeTaxReconciliationAbstract" xlink:to="us-gaap_IncomeTaxExpenseBenefitContinuingOperationsIncomeTaxReconciliationAbstract_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_IncomeTaxExpenseBenefitContinuingOperationsIncomeTaxReconciliationAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Income Tax Expense Benefit Continuing Operations Income Tax Reconciliation [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate" xlink:type="locator" xlink:label="us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Statutory tax</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate" xlink:to="us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IncomeTaxReconciliationTaxExemptIncome" xlink:type="locator" xlink:label="us-gaap_IncomeTaxReconciliationTaxExemptIncome" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_IncomeTaxReconciliationTaxExemptIncome_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Effect of nontaxable interest</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncomeTaxReconciliationTaxExemptIncome" xlink:to="us-gaap_IncomeTaxReconciliationTaxExemptIncome_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_IncomeTaxReconciliationTaxExemptIncome_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Income Tax Reconciliation Tax Exempt Income</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_IncomeTaxReconciliationBankOwnedLifeInsuranceIncome_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Bank owned life insurance, net</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_IncomeTaxReconciliationBankOwnedLifeInsuranceIncome_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Income Tax Reconciliation Bank Owned Life Insurance Income</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IncomeTaxCreditsAndAdjustments" xlink:type="locator" xlink:label="us-gaap_IncomeTaxCreditsAndAdjustments" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_IncomeTaxCreditsAndAdjustments_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Tax credits</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_IncomeTaxCreditsAndAdjustments_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Income Tax Credits And Adjustments</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_IncomeTaxReconciliationEffectOfNontaxableInsurancePremiums_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Effect of nontaxable insurance premiums</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_IncomeTaxReconciliationEffectOfNontaxableInsurancePremiums_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Income Tax Reconciliation Effect Of Nontaxable Insurance Premiums</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationShareBasedCompensationExcessTaxBenefitAmount" xlink:type="locator" xlink:label="us-gaap_EffectiveIncomeTaxRateReconciliationShareBasedCompensationExcessTaxBenefitAmount" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_EffectiveIncomeTaxRateReconciliationShareBasedCompensationExcessTaxBenefitAmount_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Stock compensation</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_EarningsPerShareBasicLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Earnings Per Share Basic [Line Items]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount" xlink:type="locator" xlink:label="us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount" />
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    <link:loc xlink:href="fmnb-20201231.xsd#fmnb_WeightedAveragePayRateOnInterestRateSwaps" xlink:type="locator" xlink:label="fmnb_WeightedAveragePayRateOnInterestRateSwaps" />
    <link:label xml:lang="en-US" xlink:label="fmnb_WeightedAveragePayRateOnInterestRateSwaps_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Weighted average pay rate on interest rate swaps.</link:label>
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    <link:loc xlink:href="fmnb-20201231.xsd#fmnb_WeightedAverageInterestRateReceivedInterestRateSwaps" xlink:type="locator" xlink:label="fmnb_WeightedAverageInterestRateReceivedInterestRateSwaps" />
    <link:label xml:lang="en-US" xlink:label="fmnb_WeightedAverageInterestRateReceivedInterestRateSwaps_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Weighted average interest rate received interest rate swaps.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="fmnb_WeightedAverageInterestRateReceivedInterestRateSwaps" xlink:to="fmnb_WeightedAverageInterestRateReceivedInterestRateSwaps_lbl" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_InterestRateDerivativesAbstract" xlink:type="locator" xlink:label="us-gaap_InterestRateDerivativesAbstract" />
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    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InterestRateDerivativesAbstract" xlink:to="us-gaap_InterestRateDerivativesAbstract_lbl" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DerivativeNotionalAmount" xlink:type="locator" xlink:label="us-gaap_DerivativeNotionalAmount" />
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DerivativeAverageRemainingMaturity1" xlink:type="locator" xlink:label="us-gaap_DerivativeAverageRemainingMaturity1" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DerivativeAverageRemainingMaturity1_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Weighted average maturity (years)</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_DerivativeAverageRemainingMaturity1_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Derivative Average Remaining Maturity1</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_InterestRateDerivativesAtFairValueNet" xlink:type="locator" xlink:label="us-gaap_InterestRateDerivativesAtFairValueNet" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_InterestRateDerivativesAtFairValueNet_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Fair value of interest-rate swaps</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_DerivativeAssets_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Fair value of loan yield maintenance provisions</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DerivativeTable" xlink:type="locator" xlink:label="us-gaap_DerivativeTable" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DerivativeTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Derivative [Table]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DerivativeTable" xlink:to="us-gaap_DerivativeTable_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DerivativeTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Derivative [Table]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DerivativeLineItems" xlink:type="locator" xlink:label="us-gaap_DerivativeLineItems" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DerivativeLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Derivative [Line Items]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DerivativeLineItems" xlink:to="us-gaap_DerivativeLineItems_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DerivativeLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Derivative [Line Items]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DerivativeGainLossOnDerivativeNet" xlink:type="locator" xlink:label="us-gaap_DerivativeGainLossOnDerivativeNet" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DerivativeGainLossOnDerivativeNet_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Net Gain or Loss recognized in earnings</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_DerivativeGainLossOnDerivativeNet_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Derivative Gain Loss On Derivative Net</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable" xlink:type="locator" xlink:label="us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule Of Segment Reporting Information By Segment [Table]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable" xlink:to="us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_lbl" />
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    <link:loc xlink:href="fmnb-20201231.xsd#fmnb_EliminationsAndReconcilingItemsMember" xlink:type="locator" xlink:label="fmnb_EliminationsAndReconcilingItemsMember" />
    <link:label xml:lang="en-US" xlink:label="fmnb_EliminationsAndReconcilingItemsMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Represents the aggregate total of reconciling items and elimination items.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="fmnb_EliminationsAndReconcilingItemsMember" xlink:to="fmnb_EliminationsAndReconcilingItemsMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="fmnb_EliminationsAndReconcilingItemsMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Eliminations And Others</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_SegmentReportingInformationLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Segment Reporting Information [Line Items]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SegmentReportingInformationLineItems" xlink:to="us-gaap_SegmentReportingInformationLineItems_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_SegmentReportingInformationLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Segment Reporting Information [Line Items]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IntangibleAssetsNetIncludingGoodwill" xlink:type="locator" xlink:label="us-gaap_IntangibleAssetsNetIncludingGoodwill" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_IntangibleAssetsNetIncludingGoodwill_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Goodwill and other intangibles</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IntangibleAssetsNetIncludingGoodwill" xlink:to="us-gaap_IntangibleAssetsNetIncludingGoodwill_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_IntangibleAssetsNetIncludingGoodwill_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Intangible Assets Net Including Goodwill</link:label>
    <link:label xml:lang="en-US" xlink:label="us-gaap_Assets_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Total assets</link:label>
    <link:label xml:lang="en-US" xlink:label="us-gaap_InterestIncomeExpenseNet_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Net interest income</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_ServiceFeesSecurityGainsAndOtherNoninterestIncome_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Service fees, security gains and other noninterest income</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_ServiceFeesSecurityGainsAndOtherNoninterestIncome_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Service Fees Security Gains And Other Noninterest Income</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_NoninterestExpenseExcludingAmortizationAndDepreciation_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Noninterest expense</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_NoninterestExpenseExcludingAmortizationAndDepreciation_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Noninterest Expense Excluding Amortization And Depreciation</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DepreciationAndAmortization" xlink:type="locator" xlink:label="us-gaap_DepreciationAndAmortization" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DepreciationAndAmortization_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Amortization and depreciation expense</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DepreciationAndAmortization" xlink:to="us-gaap_DepreciationAndAmortization_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DepreciationAndAmortization_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Depreciation And Amortization</link:label>
    <link:label xml:lang="en-US" xlink:label="us-gaap_IncomeTaxExpenseBenefit_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Income tax</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_QuarterlyFinancialDataAbstract" xlink:type="locator" xlink:label="us-gaap_QuarterlyFinancialDataAbstract" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_QuarterlyFinancialDataAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Quarterly Financial Data Abstract</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_QuarterlyFinancialDataAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Quarterly Financial Data [Abstract]</link:label>
    <link:label xml:lang="en-US" xlink:label="us-gaap_InterestAndDividendIncomeOperating_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Total interest income</link:label>
    <link:label xml:lang="en-US" xlink:label="us-gaap_InterestExpense_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Total interest expense</link:label>
    <link:label xml:lang="en-US" xlink:label="us-gaap_NoninterestIncome_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Noninterest income</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_MergerRelatedCostsIncome_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Merger related costs (income)</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_MergerRelatedCostsIncome_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Merger Related Costs Income</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_NoninterestExpenseExcludingMergerCosts_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Noninterest expense</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_NoninterestExpenseExcludingMergerCosts_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Noninterest Expense Excluding Merger Costs</link:label>
    <link:label xml:lang="en-US" xlink:label="us-gaap_IncomeTaxExpenseBenefit_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/positiveTerseLabel">Income taxes</link:label>
    <link:loc xlink:href="fmnb-20201231.xsd#fmnb_FarmersNationalCaptiveIncMember" xlink:type="locator" xlink:label="fmnb_FarmersNationalCaptiveIncMember" />
    <link:label xml:lang="en-US" xlink:label="fmnb_FarmersNationalCaptiveIncMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Farmers National Captive Inc.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="fmnb_FarmersNationalCaptiveIncMember" xlink:to="fmnb_FarmersNationalCaptiveIncMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="fmnb_FarmersNationalCaptiveIncMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Captive Insurance</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_FarmersNationalCaptiveIncMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Farmers National Captive Inc [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="fmnb_FarmersTrustCompanyMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Farmers Trust</link:label>
    <link:label xml:lang="en-US" xlink:label="us-gaap_AssetsAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Assets:</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_Cash" xlink:type="locator" xlink:label="us-gaap_Cash" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_Cash_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Cash</link:label>
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