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  <xs:element id="nwbi_FixedRatePassThroughMortgageBackedSecuritiesMember" abstract="true" name="FixedRatePassThroughMortgageBackedSecuritiesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="nwbi_VariableRatePassThroughMortgageBackedSecuritiesMember" abstract="true" name="VariableRatePassThroughMortgageBackedSecuritiesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="nwbi_FixedRateAgencyCMOsMortgageBackedSecuritiesMember" abstract="true" name="FixedRateAgencyCMOsMortgageBackedSecuritiesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="nwbi_VariableRateAgencyCMOsMortgageBackedSecuritiesMember" abstract="true" name="VariableRateAgencyCMOsMortgageBackedSecuritiesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="nwbi_AvailableForSaleSecuritiesDebtMaturitiesGrossUnrealizedGainAbstract" abstract="true" name="AvailableForSaleSecuritiesDebtMaturitiesGrossUnrealizedGainAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="nwbi_DebtSecuritiesAvailableForSaleOneYearOrLessGrossUnrealizedGain" abstract="false" name="DebtSecuritiesAvailableForSaleOneYearOrLessGrossUnrealizedGain" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="nwbi_DebtSecuritiesAvailableForSaleAfterOneThroughFiveYearsGrossUnrealizedGain" abstract="false" name="DebtSecuritiesAvailableForSaleAfterOneThroughFiveYearsGrossUnrealizedGain" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="nwbi_DebtSecuritiesAvailableForSaleAfterFiveThroughTenYearsGrossUnrealizedGain" abstract="false" name="DebtSecuritiesAvailableForSaleAfterFiveThroughTenYearsGrossUnrealizedGain" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="nwbi_DebtSecuritiesAvailableForSaleAfterTenYearsGrossUnrealizedGain" abstract="false" name="DebtSecuritiesAvailableForSaleAfterTenYearsGrossUnrealizedGain" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="nwbi_AvailableForSaleSecuritiesUnrealizedLossesAbstract" abstract="true" name="AvailableForSaleSecuritiesUnrealizedLossesAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="nwbi_DebtSecuritiesAvailableForSaleOneYearOrLessGrossUnrealizedLoss" abstract="false" name="DebtSecuritiesAvailableForSaleOneYearOrLessGrossUnrealizedLoss" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="nwbi_DebtSecuritiesAvailableForSaleAfterOneThroughFiveYearsGrossUnrealizedLoss" abstract="false" name="DebtSecuritiesAvailableForSaleAfterOneThroughFiveYearsGrossUnrealizedLoss" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="nwbi_DebtSecuritiesAvailableForSaleAfterFiveThroughTenYearsGrossUnrealizedLoss" abstract="false" name="DebtSecuritiesAvailableForSaleAfterFiveThroughTenYearsGrossUnrealizedLoss" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="nwbi_DebtSecuritiesAvailableForSaleAfterTenYearsGrossUnrealizedLoss" abstract="false" name="DebtSecuritiesAvailableForSaleAfterTenYearsGrossUnrealizedLoss" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="nwbi_HeldToMaturitySecuritiesDebtMaturitiesGrossUnrealizedGainAbstract" abstract="true" name="HeldToMaturitySecuritiesDebtMaturitiesGrossUnrealizedGainAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="nwbi_DebtSecuritiesHeldToMaturityAfterOneThroughFiveYearsGrossUnrealizedGain" abstract="false" name="DebtSecuritiesHeldToMaturityAfterOneThroughFiveYearsGrossUnrealizedGain" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="nwbi_DebtSecuritiesHeldToMaturityAfterFiveThroughTenYearsGrossUnrealizedGain" abstract="false" name="DebtSecuritiesHeldToMaturityAfterFiveThroughTenYearsGrossUnrealizedGain" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="nwbi_HeldToMaturitySecuritiesUnrealizedLossesAbstract" abstract="true" name="HeldToMaturitySecuritiesUnrealizedLossesAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="nwbi_DebtSecuritiesHeldToMaturityAfterOneThroughFiveYearsGrossUnrealizedLoss" abstract="false" name="DebtSecuritiesHeldToMaturityAfterOneThroughFiveYearsGrossUnrealizedLoss" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="nwbi_DebtSecuritiesHeldToMaturityAfterFiveThroughTenYearsGrossUnrealizedLoss" abstract="false" name="DebtSecuritiesHeldToMaturityAfterFiveThroughTenYearsGrossUnrealizedLoss" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="nwbi_HeldToMaturityAndAvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue" abstract="false" name="HeldToMaturityAndAvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="nwbi_HeldToMaturityAndAvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAggregateLosses" abstract="false" name="HeldToMaturityAndAvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAggregateLosses" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="nwbi_HeldToMaturityAndAvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue" abstract="false" name="HeldToMaturityAndAvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="nwbi_HeldToMaturityAndAvailableForSaleSecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAggregateLosses" abstract="false" name="HeldToMaturityAndAvailableForSaleSecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAggregateLosses" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="nwbi_HeldToMaturityAndAvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValue" abstract="false" name="HeldToMaturityAndAvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValue" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="nwbi_HeldToMaturityAndAvailableForSaleSecuritiesContinuousUnrealizedLossPositionAggregateLosses" abstract="false" name="HeldToMaturityAndAvailableForSaleSecuritiesContinuousUnrealizedLossPositionAggregateLosses" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="nwbi_NumberOfInvestmentPositionsWithUnrealizedLosses" abstract="false" name="NumberOfInvestmentPositionsWithUnrealizedLosses" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="nwbi_CreditRatingAxis" abstract="true" name="CreditRatingAxis" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType"/>
  <xs:element id="nwbi_CreditRatingDomain" abstract="true" name="CreditRatingDomain" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="nwbi_AAPlusRatingMember" abstract="true" name="AAPlusRatingMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="nwbi_PersonalBankingMember" abstract="true" name="PersonalBankingMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="nwbi_CommercialBankingMember" abstract="true" name="CommercialBankingMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="nwbi_CommercialRealEstateOwnerOccupiedMember" abstract="true" name="CommercialRealEstateOwnerOccupiedMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="nwbi_CommercialAndIndustrialMember" abstract="true" name="CommercialAndIndustrialMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="nwbi_OffBalanceSheetExposureMember" abstract="true" name="OffBalanceSheetExposureMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="nwbi_FinancingReceivableNonaccrualIncludingNonaccrualWithNoAllowance" abstract="false" name="FinancingReceivableNonaccrualIncludingNonaccrualWithNoAllowance" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="nwbi_FinancingReceivableRecordedInvestment90DaysOrMorePastMaturityAndStillAccruing" abstract="false" name="FinancingReceivableRecordedInvestment90DaysOrMorePastMaturityAndStillAccruing" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="nwbi_RealEstateCollateralDependentLoansMember" abstract="true" name="RealEstateCollateralDependentLoansMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="nwbi_EquipmentCollateralDependentLoansMember" abstract="true" name="EquipmentCollateralDependentLoansMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="nwbi_OtherCollateralDependentLoansMember" abstract="true" name="OtherCollateralDependentLoansMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="nwbi_FinancingReceivableNonaccrualIncludingNonaccrualWithNoAllowanceRollForwardRollForward" abstract="true" name="FinancingReceivableNonaccrualIncludingNonaccrualWithNoAllowanceRollForwardRollForward" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="nwbi_FinancingReceivableAmortizedCostOfCollateralDependentLoans" abstract="false" name="FinancingReceivableAmortizedCostOfCollateralDependentLoans" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="nwbi_FinancingReceivableModifiedWeightedAveragePaymentDeferralPeriod" abstract="false" name="FinancingReceivableModifiedWeightedAveragePaymentDeferralPeriod" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="nwbi_SpecialMentionAndSubstandardMember" abstract="true" name="SpecialMentionAndSubstandardMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="nwbi_FiniteLivedIntangibleAssetsAcquisitionDisposition" abstract="false" name="FiniteLivedIntangibleAssetsAcquisitionDisposition" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="nwbi_ResidentialFirstMortgageAndOtherLoansMember" abstract="true" name="ResidentialFirstMortgageAndOtherLoansMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="nwbi_CashAndSecuritiesCollateral" abstract="false" name="CashAndSecuritiesCollateral" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="nwbi_DebtInstrumentAmountOutstandingAfterRepurchase" abstract="false" name="DebtInstrumentAmountOutstandingAfterRepurchase" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="nwbi_DebtIssuanceCostsAmortizationPeriod" abstract="false" name="DebtIssuanceCostsAmortizationPeriod" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="nwbi_NumberOfBusinessTrustsOwned" abstract="false" name="NumberOfBusinessTrustsOwned" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="nwbi_DebtInstrumentInterestDeferralOptionMaximumPeriod" abstract="false" name="DebtInstrumentInterestDeferralOptionMaximumPeriod" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="nwbi_DebtInstrumentInterestPaymentDeferred" abstract="false" name="DebtInstrumentInterestPaymentDeferred" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="nwbi_NorthwestBancorpCapitalTrustIIIMember" abstract="true" name="NorthwestBancorpCapitalTrustIIIMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="nwbi_NorthwestBancorpStatutoryTrustIVMember" abstract="true" name="NorthwestBancorpStatutoryTrustIVMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="nwbi_LNBStatutoryTrustIIMember" abstract="false" name="LNBStatutoryTrustIIMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="nwbi_UnionNationalCapitalTrustIMember" abstract="true" name="UnionNationalCapitalTrustIMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="nwbi_UnionNationalCapitalTrustIIMember" abstract="true" name="UnionNationalCapitalTrustIIMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="nwbi_MFBCStatutoryTrustMember" abstract="true" name="MFBCStatutoryTrustMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="nwbi_UniversalPreferredTrustMember" abstract="true" name="UniversalPreferredTrustMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="nwbi_TrustPreferredIssuedTotalValue" abstract="false" name="TrustPreferredIssuedTotalValue" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="nwbi_PrivateLabelCreditCardFacilitiesMember" abstract="true" name="PrivateLabelCreditCardFacilitiesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="nwbi_CreditCardsIssuedMember" abstract="true" name="CreditCardsIssuedMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="nwbi_GuaranteeObligationsMaximumExposureCollateralized" abstract="false" name="GuaranteeObligationsMaximumExposureCollateralized" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="nwbi_FinancingReceivableCommitmentsAuthorizedCreditLimit" abstract="false" name="FinancingReceivableCommitmentsAuthorizedCreditLimit" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="nwbi_FinancingReceivableCommitmentsOutstanding" abstract="false" name="FinancingReceivableCommitmentsOutstanding" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="nwbi_EarningsPerShareDilutedMethodAxis" abstract="true" name="EarningsPerShareDilutedMethodAxis" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType"/>
  <xs:element id="nwbi_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisFinancialInstrumentsTotalUnrealizedGainsLossesPeriodIncreaseDecrease" abstract="false" name="FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisFinancialInstrumentsTotalUnrealizedGainsLossesPeriodIncreaseDecrease" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="nwbi_SavingsAndDemandDeposits" abstract="false" name="SavingsAndDemandDeposits" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="nwbi_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetsInterestRateLockCommitmentsRealizedAndUnrealizedAbstract" abstract="true" name="FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetsInterestRateLockCommitmentsRealizedAndUnrealizedAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="nwbi_ImpairedLoansMember" abstract="true" name="ImpairedLoansMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="nwbi_MeasurementInputPullThroughRateMember" abstract="true" name="MeasurementInputPullThroughRateMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="nwbi_ValuationTechniqueQuotedPricingMember" abstract="true" name="ValuationTechniqueQuotedPricingMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="nwbi_LoansReceivableMeasurementInput" abstract="false" name="LoansReceivableMeasurementInput" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:decimalItemType"/>
  <xs:element id="nwbi_InterestRateSwapIssuedMay112023Member" abstract="true" name="InterestRateSwapIssuedMay112023Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="nwbi_InterestRateSwapIssuedMay122023ContractOneMember" abstract="true" name="InterestRateSwapIssuedMay122023ContractOneMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="nwbi_InterestRateSwapIssuedMay192023ContractTwoMember" abstract="true" name="InterestRateSwapIssuedMay192023ContractTwoMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="nwbi_InterestRateSwapIssuedMay312023ContractThreeMember" abstract="true" name="InterestRateSwapIssuedMay312023ContractThreeMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="nwbi_InterestRateSwapIssuedJuly262023ContractFourMember" abstract="true" name="InterestRateSwapIssuedJuly262023ContractFourMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="nwbi_InterestRateSwapIssuedJuly312023ContractFiveMember" abstract="true" name="InterestRateSwapIssuedJuly312023ContractFiveMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="nwbi_InterestRateSwapIssuedAugust92023ContractSixMember" abstract="true" name="InterestRateSwapIssuedAugust92023ContractSixMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="nwbi_DerivativeEffectiveInterestRate" abstract="false" name="DerivativeEffectiveInterestRate" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="nwbi_BankingSegmentMember" abstract="true" name="BankingSegmentMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="nwbi_SegmentReconciliationOfRevenueAbstract" abstract="true" name="SegmentReconciliationOfRevenueAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="nwbi_NetInterestAndNoninterestIncome" abstract="false" name="NetInterestAndNoninterestIncome" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
</xs:schema>
