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

<!--XBRL Document Created with the Workiva Platform-->
<!--Copyright 2024 Workiva-->
<!--r:5ff3a5c8-2b1a-496a-83b5-c21730e7a1aa,g:085f31cb-2bf6-46f1-96b8-3fb01a0a7d87-->
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:blkb="http://www.blackbaud.com/20240630" xmlns:xbrli="http://www.xbrl.org/2003/instance" xmlns:dtr-types="http://www.xbrl.org/dtr/type/2022-03-31" xmlns:dtr-types1="http://www.xbrl.org/dtr/type/2020-01-21" attributeFormDefault="unqualified" elementFormDefault="qualified" targetNamespace="http://www.blackbaud.com/20240630">
  <xs:import namespace="http://fasb.org/srt/2024" schemaLocation="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd"/>
  <xs:import namespace="http://fasb.org/us-gaap/2024" schemaLocation="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd"/>
  <xs:import namespace="http://www.w3.org/1999/xlink" schemaLocation="http://www.xbrl.org/2003/xlink-2003-12-31.xsd"/>
  <xs:import namespace="http://www.xbrl.org/2003/instance" schemaLocation="http://www.xbrl.org/2003/xbrl-instance-2003-12-31.xsd"/>
  <xs:import namespace="http://www.xbrl.org/2003/linkbase" schemaLocation="http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd"/>
  <xs:import namespace="http://www.xbrl.org/dtr/type/2020-01-21" schemaLocation="https://www.xbrl.org/dtr/type/2020-01-21/types.xsd"/>
  <xs:import namespace="http://www.xbrl.org/dtr/type/2022-03-31" schemaLocation="https://www.xbrl.org/dtr/type/2022-03-31/types.xsd"/>
  <xs:import namespace="http://xbrl.sec.gov/country/2024" schemaLocation="https://xbrl.sec.gov/country/2024/country-2024.xsd"/>
  <xs:import namespace="http://xbrl.sec.gov/dei/2024" schemaLocation="https://xbrl.sec.gov/dei/2024/dei-2024.xsd"/>
  <xs:import namespace="http://xbrl.sec.gov/ecd/2024" schemaLocation="https://xbrl.sec.gov/ecd/2024/ecd-2024.xsd"/>
  <xs:annotation>
    <xs:appinfo>
      <link:linkbaseRef xmlns:xlink="http://www.w3.org/1999/xlink" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:href="blkb-20240630_pre.xml" xlink:role="http://www.xbrl.org/2003/role/presentationLinkbaseRef" xlink:type="simple"/>
      <link:linkbaseRef xmlns:xlink="http://www.w3.org/1999/xlink" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:href="blkb-20240630_def.xml" xlink:role="http://www.xbrl.org/2003/role/definitionLinkbaseRef" xlink:type="simple"/>
      <link:linkbaseRef xmlns:xlink="http://www.w3.org/1999/xlink" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:href="blkb-20240630_lab.xml" xlink:role="http://www.xbrl.org/2003/role/labelLinkbaseRef" xlink:type="simple"/>
      <link:linkbaseRef xmlns:xlink="http://www.w3.org/1999/xlink" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:href="blkb-20240630_cal.xml" xlink:role="http://www.xbrl.org/2003/role/calculationLinkbaseRef" xlink:type="simple"/>
      <link:roleType id="Document" roleURI="http://www.blackbaud.com/role/Document">
        <link:definition>0000001 - Document - Document</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="CondensedConsolidatedBalanceSheets" roleURI="http://www.blackbaud.com/role/CondensedConsolidatedBalanceSheets">
        <link:definition>9952151 - Statement - Condensed Consolidated Balance Sheets</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="CondensedConsolidatedBalanceSheetsParenthetical" roleURI="http://www.blackbaud.com/role/CondensedConsolidatedBalanceSheetsParenthetical">
        <link:definition>9952152 - Statement - Condensed Consolidated Balance Sheets (Parenthetical)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="CondensedConsolidatedStatementsofComprehensiveIncome" roleURI="http://www.blackbaud.com/role/CondensedConsolidatedStatementsofComprehensiveIncome">
        <link:definition>9952153 - Statement - Condensed Consolidated Statements of Comprehensive Income</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="CondensedConsolidatedStatementsofCashFlows" roleURI="http://www.blackbaud.com/role/CondensedConsolidatedStatementsofCashFlows">
        <link:definition>9952154 - Statement - Condensed Consolidated Statements of Cash Flows</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="CondensedConsolidatedStatementsofStockholdersEquity" roleURI="http://www.blackbaud.com/role/CondensedConsolidatedStatementsofStockholdersEquity">
        <link:definition>9952155 - Statement - Condensed Consolidated Statements of Stockholders' Equity</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="Organization" roleURI="http://www.blackbaud.com/role/Organization">
        <link:definition>9952156 - Disclosure - Organization</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="BasisofPresentation" roleURI="http://www.blackbaud.com/role/BasisofPresentation">
        <link:definition>9952157 - Disclosure - Basis of Presentation</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="BusinessCombinations" roleURI="http://www.blackbaud.com/role/BusinessCombinations">
        <link:definition>9952158 - Disclosure - Business Combinations</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="EarningsPerShare" roleURI="http://www.blackbaud.com/role/EarningsPerShare">
        <link:definition>9952159 - Disclosure - Earnings Per Share</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="FairValueMeasurements" roleURI="http://www.blackbaud.com/role/FairValueMeasurements">
        <link:definition>9952160 - Disclosure - Fair Value Measurements</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="ConsolidatedFinancialStatementDetails" roleURI="http://www.blackbaud.com/role/ConsolidatedFinancialStatementDetails">
        <link:definition>9952161 - Disclosure - Consolidated Financial Statement Details</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="Debt" roleURI="http://www.blackbaud.com/role/Debt">
        <link:definition>9952162 - Disclosure - Debt</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="DerivativeInstruments" roleURI="http://www.blackbaud.com/role/DerivativeInstruments">
        <link:definition>9952163 - Disclosure - Derivative Instruments</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="CommitmentsandContingencies" roleURI="http://www.blackbaud.com/role/CommitmentsandContingencies">
        <link:definition>9952164 - Disclosure - Commitments and Contingencies</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="IncomeTaxes" roleURI="http://www.blackbaud.com/role/IncomeTaxes">
        <link:definition>9952165 - Disclosure - Income Taxes</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="StockholdersEquity" roleURI="http://www.blackbaud.com/role/StockholdersEquity">
        <link:definition>9952166 - Disclosure - Stockholders' Equity</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="RevenueRecognition" roleURI="http://www.blackbaud.com/role/RevenueRecognition">
        <link:definition>9952167 - Disclosure - Revenue Recognition</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SubsequentEvents" roleURI="http://www.blackbaud.com/role/SubsequentEvents">
        <link:definition>9952168 - Disclosure - Subsequent Events</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="BasisofPresentationPolicy" roleURI="http://www.blackbaud.com/role/BasisofPresentationPolicy">
        <link:definition>9954471 - Disclosure - Basis of Presentation (Policy)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="EarningsPerShareTables" roleURI="http://www.blackbaud.com/role/EarningsPerShareTables">
        <link:definition>9954472 - Disclosure - Earnings Per Share (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="FairValueMeasurementsTables" roleURI="http://www.blackbaud.com/role/FairValueMeasurementsTables">
        <link:definition>9954473 - Disclosure - Fair Value Measurements (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="ConsolidatedFinancialStatementDetailsTables" roleURI="http://www.blackbaud.com/role/ConsolidatedFinancialStatementDetailsTables">
        <link:definition>9954474 - Disclosure - Consolidated Financial Statement Details (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="DebtTables" roleURI="http://www.blackbaud.com/role/DebtTables">
        <link:definition>9954475 - Disclosure - Debt (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="DerivativeInstrumentsTables" roleURI="http://www.blackbaud.com/role/DerivativeInstrumentsTables">
        <link:definition>9954476 - Disclosure - Derivative Instruments (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="CommitmentsandContingenciesTables" roleURI="http://www.blackbaud.com/role/CommitmentsandContingenciesTables">
        <link:definition>9954477 - Disclosure - Commitments and Contingencies (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="IncomeTaxesTables" roleURI="http://www.blackbaud.com/role/IncomeTaxesTables">
        <link:definition>9954478 - Disclosure - Income Taxes (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="StockholdersEquityTables" roleURI="http://www.blackbaud.com/role/StockholdersEquityTables">
        <link:definition>9954479 - Disclosure - Stockholders' Equity (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="RevenueRecognitionTables" roleURI="http://www.blackbaud.com/role/RevenueRecognitionTables">
        <link:definition>9954480 - Disclosure - Revenue Recognition (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="BusinessCombinationsDetails" roleURI="http://www.blackbaud.com/role/BusinessCombinationsDetails">
        <link:definition>9954481 - Disclosure - Business Combinations (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="EarningsPerShareComputationofBasicandDilutedEarningsPerShareDetails" roleURI="http://www.blackbaud.com/role/EarningsPerShareComputationofBasicandDilutedEarningsPerShareDetails">
        <link:definition>9954482 - Disclosure - Earnings Per Share (Computation of Basic and Diluted Earnings Per Share) (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="FairValueMeasurementsFairValueMeasurementsDetails" roleURI="http://www.blackbaud.com/role/FairValueMeasurementsFairValueMeasurementsDetails">
        <link:definition>9954483 - Disclosure - Fair Value Measurements Fair Value Measurements (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="FairValueMeasurementsAssetsandLiabilitiesMeasuredatFairValueonaRecurringBasisDetails" roleURI="http://www.blackbaud.com/role/FairValueMeasurementsAssetsandLiabilitiesMeasuredatFairValueonaRecurringBasisDetails">
        <link:definition>9954484 - Disclosure - Fair Value Measurements (Assets and Liabilities Measured at Fair Value on a Recurring Basis) (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="ConsolidatedFinancialStatementDetailsComponentsofRestrictedCashDetails" roleURI="http://www.blackbaud.com/role/ConsolidatedFinancialStatementDetailsComponentsofRestrictedCashDetails">
        <link:definition>9954485 - Disclosure - Consolidated Financial Statement Details (Components of Restricted Cash) (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="ConsolidatedFinancialStatementDetailsComponentsofPrepaidExpensesandOtherAssetsDetails" roleURI="http://www.blackbaud.com/role/ConsolidatedFinancialStatementDetailsComponentsofPrepaidExpensesandOtherAssetsDetails">
        <link:definition>9954486 - Disclosure - Consolidated Financial Statement Details (Components of Prepaid Expenses and Other Assets) (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="ConsolidatedFinancialStatementDetailsComponentsofPrepaidExpensesandOtherAssetsDetails_1" roleURI="http://www.blackbaud.com/role/ConsolidatedFinancialStatementDetailsComponentsofPrepaidExpensesandOtherAssetsDetails_1">
        <link:definition>9954486 - Disclosure - Consolidated Financial Statement Details (Components of Prepaid Expenses and Other Assets) (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="ConsolidatedFinancialStatementDetailsComponentsofAccruedExpensesandOtherLiabilitiesDetails" roleURI="http://www.blackbaud.com/role/ConsolidatedFinancialStatementDetailsComponentsofAccruedExpensesandOtherLiabilitiesDetails">
        <link:definition>9954487 - Disclosure - Consolidated Financial Statement Details (Components of Accrued Expenses and Other Liabilities) (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="ConsolidatedFinancialStatementDetailsComponentsofAccruedExpensesandOtherLiabilitiesDetails_1" roleURI="http://www.blackbaud.com/role/ConsolidatedFinancialStatementDetailsComponentsofAccruedExpensesandOtherLiabilitiesDetails_1">
        <link:definition>9954487 - Disclosure - Consolidated Financial Statement Details (Components of Accrued Expenses and Other Liabilities) (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="ConsolidatedFinancialStatementDetailsComponentsofOtherIncomeandExpenseDetails" roleURI="http://www.blackbaud.com/role/ConsolidatedFinancialStatementDetailsComponentsofOtherIncomeandExpenseDetails">
        <link:definition>9954488 - Disclosure - Consolidated Financial Statement Details (Components of Other Income and Expense) (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="DebtDetails" roleURI="http://www.blackbaud.com/role/DebtDetails">
        <link:definition>9954489 - Disclosure - Debt (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="DebtSummaryofDebtDetails" roleURI="http://www.blackbaud.com/role/DebtSummaryofDebtDetails">
        <link:definition>9954490 - Disclosure - Debt (Summary of Debt) (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="DebtSummaryofCurrentlyEffectiveThirdPartyFinancingAgreementsDetails" roleURI="http://www.blackbaud.com/role/DebtSummaryofCurrentlyEffectiveThirdPartyFinancingAgreementsDetails">
        <link:definition>9954491 - Disclosure - Debt (Summary of Currently Effective Third-Party Financing Agreements) (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="DebtChangesinSupplierFinancingObligationsDetails" roleURI="http://www.blackbaud.com/role/DebtChangesinSupplierFinancingObligationsDetails">
        <link:definition>9954492 - Disclosure - Debt (Changes in Supplier Financing Obligations) (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="DebtAnnualMaturitiesRelatedtoCreditFacilityRealEstateLoansandotherdebtDetails" roleURI="http://www.blackbaud.com/role/DebtAnnualMaturitiesRelatedtoCreditFacilityRealEstateLoansandotherdebtDetails">
        <link:definition>9954493 - Disclosure - Debt (Annual Maturities Related to Credit Facility, Real Estate Loans and other debt) (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="DerivativeInstrumentsDetails" roleURI="http://www.blackbaud.com/role/DerivativeInstrumentsDetails">
        <link:definition>9954494 - Disclosure - Derivative Instruments (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="DerivativeInstrumentsFairValueofDerivativeInstrumentsDetails" roleURI="http://www.blackbaud.com/role/DerivativeInstrumentsFairValueofDerivativeInstrumentsDetails">
        <link:definition>9954495 - Disclosure - Derivative Instruments (Fair Value of Derivative Instruments) (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="DerivativeInstrumentsEffectsofDerivativeInstrumentsinCashFlowHedgingRelationshipsDetails" roleURI="http://www.blackbaud.com/role/DerivativeInstrumentsEffectsofDerivativeInstrumentsinCashFlowHedgingRelationshipsDetails">
        <link:definition>9954496 - Disclosure - Derivative Instruments (Effects of Derivative Instruments in Cash Flow Hedging Relationships) (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="CommitmentsandContingenciesDetails" roleURI="http://www.blackbaud.com/role/CommitmentsandContingenciesDetails">
        <link:definition>9954497 - Disclosure - Commitments and Contingencies (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="CommitmentsandContingenciesComponentsofLeaseExpenseDetails" roleURI="http://www.blackbaud.com/role/CommitmentsandContingenciesComponentsofLeaseExpenseDetails">
        <link:definition>9954498 - Disclosure - Commitments and Contingencies (Components of Lease Expense) (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="CommitmentsandContingenciesScheduleofMaturitiesofOperatingLeaseLiabilitiesDetails" roleURI="http://www.blackbaud.com/role/CommitmentsandContingenciesScheduleofMaturitiesofOperatingLeaseLiabilitiesDetails">
        <link:definition>9954499 - Disclosure - Commitments and Contingencies (Schedule of Maturities of Operating Lease Liabilities) (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="CommitmentsandContingenciesScheduleofSecurityIncidentExpenseandProbableInsuranceRecoveriesDetails" roleURI="http://www.blackbaud.com/role/CommitmentsandContingenciesScheduleofSecurityIncidentExpenseandProbableInsuranceRecoveriesDetails">
        <link:definition>9954500 - Disclosure - Commitments and Contingencies (Schedule of Security Incident Expense and Probable Insurance Recoveries) (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="IncomeTaxesScheduleofEffectiveIncomeTaxRatesDetails" roleURI="http://www.blackbaud.com/role/IncomeTaxesScheduleofEffectiveIncomeTaxRatesDetails">
        <link:definition>9954501 - Disclosure - Income Taxes (Schedule of Effective Income Tax Rates) (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="StockholdersEquityDetails" roleURI="http://www.blackbaud.com/role/StockholdersEquityDetails">
        <link:definition>9954502 - Disclosure - Stockholders' Equity (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="StockholdersEquityChangesinAccumulatedOtherComprehensiveLossbyComponentDetails" roleURI="http://www.blackbaud.com/role/StockholdersEquityChangesinAccumulatedOtherComprehensiveLossbyComponentDetails">
        <link:definition>9954503 - Disclosure - Stockholders' Equity (Changes in Accumulated Other Comprehensive Loss by Component) (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="RevenueRecognitionDetails" roleURI="http://www.blackbaud.com/role/RevenueRecognitionDetails">
        <link:definition>9954504 - Disclosure - Revenue Recognition (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="RevenueRecognitionDetails_1" roleURI="http://www.blackbaud.com/role/RevenueRecognitionDetails_1">
        <link:definition>9954504 - Disclosure - Revenue Recognition (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="RevenueRecognitionContractBalancesDetails" roleURI="http://www.blackbaud.com/role/RevenueRecognitionContractBalancesDetails">
        <link:definition>9954505 - Disclosure - Revenue Recognition (Contract Balances) (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="RevenueRecognitionDisaggregationofRevenuebyGeographyDetails" roleURI="http://www.blackbaud.com/role/RevenueRecognitionDisaggregationofRevenuebyGeographyDetails">
        <link:definition>9954506 - Disclosure - Revenue Recognition (Disaggregation of Revenue by Geography) (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="RevenueRecognitionDisaggregationofRevenuebyMarketGroupDetails" roleURI="http://www.blackbaud.com/role/RevenueRecognitionDisaggregationofRevenuebyMarketGroupDetails">
        <link:definition>9954507 - Disclosure - Revenue Recognition (Disaggregation of Revenue by Market Group) (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="RevenueRecognitionDisaggregationofRecurringRevenuebyTypeDetails" roleURI="http://www.blackbaud.com/role/RevenueRecognitionDisaggregationofRecurringRevenuebyTypeDetails">
        <link:definition>9954508 - Disclosure - Revenue Recognition (Disaggregation of Recurring Revenue by Type) (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SubsequentEventsDetails" roleURI="http://www.blackbaud.com/role/SubsequentEventsDetails">
        <link:definition>9954509 - Disclosure - Subsequent Events (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
    </xs:appinfo>
  </xs:annotation>
  <xs:element id="blkb_LiabilityInsuranceAmountTotal" abstract="false" name="LiabilityInsuranceAmountTotal" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="blkb_MichaelP.GianoniMember" abstract="true" name="MichaelP.GianoniMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="blkb_SecurityIncidentNetExpense" abstract="false" name="SecurityIncidentNetExpense" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="blkb_SecurityIncidentSubrogationClaimsNumber" abstract="false" name="SecurityIncidentSubrogationClaimsNumber" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="blkb_ThirdpartyTechnologyMember" abstract="true" name="ThirdpartyTechnologyMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="blkb_LongtermPurchaseCommitmentRemainingMinimumAmountCommitted" abstract="false" name="LongtermPurchaseCommitmentRemainingMinimumAmountCommitted" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="blkb_SecurityIncidentPenalty" abstract="false" name="SecurityIncidentPenalty" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="blkb_GlobalHQMember" abstract="true" name="GlobalHQMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="blkb_DerivativeAssetsCurrentAndLongTerm" abstract="false" name="DerivativeAssetsCurrentAndLongTerm" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="blkb_SwinglineloansMember" abstract="true" name="SwinglineloansMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="blkb_TaxesPrepaidAndReceivableCurrentAndLongTerm" abstract="false" name="TaxesPrepaidAndReceivableCurrentAndLongTerm" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="blkb_LineofCreditFacilityAvailableIncreaseCapacityAmount" abstract="false" name="LineofCreditFacilityAvailableIncreaseCapacityAmount" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="blkb_ScheduleOfRestrictedCashTableTextBlock" abstract="false" name="ScheduleOfRestrictedCashTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:textBlockItemType"/>
  <xs:element id="blkb_RecurringMember" abstract="true" name="RecurringMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="blkb_LineOfCreditFacilityVariableInterestRate" abstract="false" name="LineOfCreditFacilityVariableInterestRate" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:percentItemType"/>
  <xs:element id="blkb_NetLeverageRatio" abstract="false" name="NetLeverageRatio" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:pureItemType"/>
  <xs:element id="blkb_LesseeOperatingLeaseLiabilityToBePaidAfterYearFour" abstract="false" name="LesseeOperatingLeaseLiabilityToBePaidAfterYearFour" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="blkb_IncreaseDecreaseInDueToCustomers" abstract="false" name="IncreaseDecreaseInDueToCustomers" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="blkb_ExerciseOfStockOptionsAndStockAppreciationRightsShares" abstract="false" name="ExerciseOfStockOptionsAndStockAppreciationRightsShares" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="blkb_LineOfCreditFacilityAvailableIncreaseCapacityPercentOfEBITDA" abstract="false" name="LineOfCreditFacilityAvailableIncreaseCapacityPercentOfEBITDA" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="blkb_LiabilityInsuranceAmountDeductible" abstract="false" name="LiabilityInsuranceAmountDeductible" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="blkb_PrepaidInsuranceCurrentandLongterm" abstract="false" name="PrepaidInsuranceCurrentandLongterm" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="blkb_July2024StockRepurchaseProgramMember" abstract="true" name="July2024StockRepurchaseProgramMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="blkb_SecurityIncidentExpectedCost" abstract="false" name="SecurityIncidentExpectedCost" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="blkb_DisaggregationOfRevenueRecurringTableTextBlock" abstract="false" name="DisaggregationOfRevenueRecurringTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:textBlockItemType"/>
  <xs:element id="blkb_January2024StockRepurchaseProgramMember" abstract="true" name="January2024StockRepurchaseProgramMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="blkb_OthercountriesMember" abstract="true" name="OthercountriesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="blkb_SecurityIncidentNumberOfStateAttorneysGeneral" abstract="false" name="SecurityIncidentNumberOfStateAttorneysGeneral" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="blkb_PrepaidSoftwareMaintenanceCurrentAndLongTerm" abstract="false" name="PrepaidSoftwareMaintenanceCurrentAndLongTerm" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="blkb_SecurityIncidentCumulativeNetExpense" abstract="false" name="SecurityIncidentCumulativeNetExpense" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="blkb_CashUsedInDivestitureOfBusinesses" abstract="false" name="CashUsedInDivestitureOfBusinesses" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="blkb_DerivativeLiabilitiesCurrentAndLongTerm" abstract="false" name="DerivativeLiabilitiesCurrentAndLongTerm" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="blkb_DesignatedCurrencyRateMember" abstract="true" name="DesignatedCurrencyRateMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="blkb_AccruedExpensesAndOtherLiabilitiesTextBlock" abstract="false" name="AccruedExpensesAndOtherLiabilitiesTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:textBlockItemType"/>
  <xs:element id="blkb_ScheduleOfEffectiveIncomeTaxRateTableTextBlock" abstract="false" name="ScheduleOfEffectiveIncomeTaxRateTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:textBlockItemType"/>
  <xs:element id="blkb_SecurityIncidentOngoingLegalFees" abstract="false" name="SecurityIncidentOngoingLegalFees" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="blkb_ExerciseOfStockOptionsAndStockAppreciationRightsValue" abstract="false" name="ExerciseOfStockOptionsAndStockAppreciationRightsValue" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="blkb_NonoperatingIncomeExpenseExcludingInterestExpense" abstract="false" name="NonoperatingIncomeExpenseExcludingInterestExpense" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="blkb_TransactionalRecurringMember" abstract="true" name="TransactionalRecurringMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="blkb_AccruedCommissionsAndSalariesCurrentAndLongTerm" abstract="false" name="AccruedCommissionsAndSalariesCurrentAndLongTerm" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="blkb_AccumulatedOtherComprehensiveIncomeRollForward" abstract="true" name="AccumulatedOtherComprehensiveIncomeRollForward" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="blkb_ContractualRecurringMember" abstract="true" name="ContractualRecurringMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="blkb_DueToCustomersCurrent" abstract="false" name="DueToCustomersCurrent" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="blkb_SecurityIncidentExpense" abstract="false" name="SecurityIncidentExpense" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="blkb_CorporateSectorMember" abstract="true" name="CorporateSectorMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="blkb_IncreaseDecreaseAccruedExpensesAndOtherLiabilities" abstract="false" name="IncreaseDecreaseAccruedExpensesAndOtherLiabilities" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="blkb_AccruedTransactionBasedCostsRelatedToPaymentsServices" abstract="false" name="AccruedTransactionBasedCostsRelatedToPaymentsServices" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="blkb_KevinR.McDearisMember" abstract="true" name="KevinR.McDearisMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="blkb_SecurityIncidentNetPreTaxExpense" abstract="false" name="SecurityIncidentNetPreTaxExpense" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="blkb_AccruedCustomerCreditBalancesCurrentAndLongTerm" abstract="false" name="AccruedCustomerCreditBalancesCurrentAndLongTerm" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="blkb_AccruedExpensesAndOtherCurrentLiabilities" abstract="false" name="AccruedExpensesAndOtherCurrentLiabilities" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="blkb_ScheduleOfPrepaidExpensesAndOtherAssetsCurrentTableTextBlock" abstract="false" name="ScheduleOfPrepaidExpensesAndOtherAssetsCurrentTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:textBlockItemType"/>
  <xs:element id="blkb_EVERFILimitedMember" abstract="true" name="EVERFILimitedMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="blkb_SecurityIncidentNetCashOutlays" abstract="false" name="SecurityIncidentNetCashOutlays" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="blkb_Q12024ASRMember" abstract="true" name="Q12024ASRMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="blkb_SecurityIncidentCumulativeAccruedInsuranceRecoveries" abstract="false" name="SecurityIncidentCumulativeAccruedInsuranceRecoveries" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="blkb_ExpectedNetCashOutlaysForOngoingLegalFees" abstract="false" name="ExpectedNetCashOutlaysForOngoingLegalFees" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="blkb_SecurityIncidentAccruedInsuranceRecoveries" abstract="false" name="SecurityIncidentAccruedInsuranceRecoveries" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="blkb_PrepaidSoftwareMaintenanceAndSubscriptionsCurrent" abstract="false" name="PrepaidSoftwareMaintenanceAndSubscriptionsCurrent" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="blkb_December2021StockRepurchaseProgramMember" abstract="true" name="December2021StockRepurchaseProgramMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="blkb_AcceleratedShareRepurchasesInitialDeliveryPercentageOfShares" abstract="false" name="AcceleratedShareRepurchasesInitialDeliveryPercentageOfShares" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="blkb_SocialSectorMember" abstract="true" name="SocialSectorMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="blkb_SecurityIncidentCumulativeExpense" abstract="false" name="SecurityIncidentCumulativeExpense" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="blkb_ChangeInCustomerFundsReceivable" abstract="false" name="ChangeInCustomerFundsReceivable" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="blkb_ScheduleOfDebtInstrumentsOtherTableTextBlock" abstract="false" name="ScheduleOfDebtInstrumentsOtherTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:textBlockItemType"/>
</xs:schema>
