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

<!--XBRL Document Created with Wdesk from Workiva-->
<!--Copyright 2021 Workiva-->
<!--r:81626668-e187-4023-9878-57d1dd12714f,g:bee2ebe9-1642-43fd-b391-9da3fa0e751a-->
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:zi="http://www.zoominfo.com/20201231" xmlns:xbrli="http://www.xbrl.org/2003/instance" xmlns:nonnum="http://www.xbrl.org/dtr/type/non-numeric" xmlns:num="http://www.xbrl.org/dtr/type/numeric" xmlns:srt-types="http://fasb.org/srt-types/2020-01-31" xmlns:xbrldt="http://xbrl.org/2005/xbrldt" attributeFormDefault="unqualified" elementFormDefault="qualified" targetNamespace="http://www.zoominfo.com/20201231">
  <xs:import namespace="http://fasb.org/srt-types/2020-01-31" schemaLocation="http://xbrl.fasb.org/srt/2020/elts/srt-types-2020-01-31.xsd"/>
  <xs:import namespace="http://fasb.org/srt/2020-01-31" schemaLocation="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd"/>
  <xs:import namespace="http://fasb.org/us-gaap/2020-01-31" schemaLocation="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.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/non-numeric" schemaLocation="http://www.xbrl.org/dtr/type/nonNumeric-2009-12-16.xsd"/>
  <xs:import namespace="http://www.xbrl.org/dtr/type/numeric" schemaLocation="http://www.xbrl.org/dtr/type/numeric-2009-12-16.xsd"/>
  <xs:import namespace="http://xbrl.org/2005/xbrldt" schemaLocation="http://www.xbrl.org/2005/xbrldt-2005.xsd"/>
  <xs:import namespace="http://xbrl.sec.gov/country/2020-01-31" schemaLocation="https://xbrl.sec.gov/country/2020/country-2020-01-31.xsd"/>
  <xs:import namespace="http://xbrl.sec.gov/dei/2020-01-31" schemaLocation="https://xbrl.sec.gov/dei/2020/dei-2020-01-31.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="zi-20201231_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="zi-20201231_cal.xml" xlink:role="http://www.xbrl.org/2003/role/calculationLinkbaseRef" 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="zi-20201231_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="zi-20201231_pre.xml" xlink:role="http://www.xbrl.org/2003/role/presentationLinkbaseRef" xlink:type="simple"/>
      <link:roleType id="Coverpage" roleURI="http://www.zoominfo.com/role/Coverpage">
        <link:definition>0001001 - Document - Cover page</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="ConsolidatedBalanceSheets" roleURI="http://www.zoominfo.com/role/ConsolidatedBalanceSheets">
        <link:definition>1001002 - Statement - 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="ConsolidatedBalanceSheetsParenthetical" roleURI="http://www.zoominfo.com/role/ConsolidatedBalanceSheetsParenthetical">
        <link:definition>1002003 - Statement - 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="ConsolidatedStatementsofOperations" roleURI="http://www.zoominfo.com/role/ConsolidatedStatementsofOperations">
        <link:definition>1003004 - Statement - Consolidated Statements of Operations</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="ConsolidatedStatementsofOperationsParenthetical" roleURI="http://www.zoominfo.com/role/ConsolidatedStatementsofOperationsParenthetical">
        <link:definition>1004005 - Statement - Consolidated Statements of Operations (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="ConsolidatedStatementsofComprehensiveIncomeLoss" roleURI="http://www.zoominfo.com/role/ConsolidatedStatementsofComprehensiveIncomeLoss">
        <link:definition>1005006 - Statement - Consolidated Statements of Comprehensive Income (Loss)</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="ConsolidatedStatementsofChangesinEquityDeficit" roleURI="http://www.zoominfo.com/role/ConsolidatedStatementsofChangesinEquityDeficit">
        <link:definition>1006007 - Statement - Consolidated Statements of Changes in Equity (Deficit)</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="ConsolidatedStatementsofCashFlows" roleURI="http://www.zoominfo.com/role/ConsolidatedStatementsofCashFlows">
        <link:definition>1007008 - Statement - 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="OrganizationandBackground" roleURI="http://www.zoominfo.com/role/OrganizationandBackground">
        <link:definition>2101101 - Disclosure - Organization and Background</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="OrganizationandBackgroundDetails" roleURI="http://www.zoominfo.com/role/OrganizationandBackgroundDetails">
        <link:definition>2402401 - Disclosure - Organization and Background (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="BasisofPresentationandSummaryofSignificantAccountingPolicies" roleURI="http://www.zoominfo.com/role/BasisofPresentationandSummaryofSignificantAccountingPolicies">
        <link:definition>2103102 - Disclosure - Basis of Presentation and Summary of Significant Accounting Policies</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="BasisofPresentationandSummaryofSignificantAccountingPoliciesPolicies" roleURI="http://www.zoominfo.com/role/BasisofPresentationandSummaryofSignificantAccountingPoliciesPolicies">
        <link:definition>2204201 - Disclosure - Basis of Presentation and Summary of Significant Accounting Policies (Policies)</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="BasisofPresentationandSummaryofSignificantAccountingPoliciesDetails" roleURI="http://www.zoominfo.com/role/BasisofPresentationandSummaryofSignificantAccountingPoliciesDetails">
        <link:definition>2405402 - Disclosure - Basis of Presentation and Summary of Significant Accounting Policies (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="RevenuefromContractswithCustomers" roleURI="http://www.zoominfo.com/role/RevenuefromContractswithCustomers">
        <link:definition>2106103 - Disclosure - Revenue from Contracts with Customers</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="RevenuefromContractswithCustomersTables" roleURI="http://www.zoominfo.com/role/RevenuefromContractswithCustomersTables">
        <link:definition>2307301 - Disclosure - Revenue from Contracts with Customers (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="RevenuefromContractswithCustomersRevenueDisaggregatedbyServiceOfferingDetails" roleURI="http://www.zoominfo.com/role/RevenuefromContractswithCustomersRevenueDisaggregatedbyServiceOfferingDetails">
        <link:definition>2408403 - Disclosure - Revenue from Contracts with Customers - Revenue Disaggregated by Service Offering (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="RevenuefromContractswithCustomersNarrativeDetails" roleURI="http://www.zoominfo.com/role/RevenuefromContractswithCustomersNarrativeDetails">
        <link:definition>2409404 - Disclosure - Revenue from Contracts with Customers - Narrative (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="RevenuefromContractswithCustomersNarrativeDetails_1" roleURI="http://www.zoominfo.com/role/RevenuefromContractswithCustomersNarrativeDetails_1">
        <link:definition>2409404 - Disclosure - Revenue from Contracts with Customers - Narrative (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="RevenuefromContractswithCustomersRemainingPerformanceObligationsDetails" roleURI="http://www.zoominfo.com/role/RevenuefromContractswithCustomersRemainingPerformanceObligationsDetails">
        <link:definition>2410405 - Disclosure - Revenue from Contracts with Customers - Remaining Performance 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="RevenuefromContractswithCustomersRemainingPerformanceObligationsDetails_1" roleURI="http://www.zoominfo.com/role/RevenuefromContractswithCustomersRemainingPerformanceObligationsDetails_1">
        <link:definition>2410405 - Disclosure - Revenue from Contracts with Customers - Remaining Performance 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="BusinessCombinations" roleURI="http://www.zoominfo.com/role/BusinessCombinations">
        <link:definition>2111104 - 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="BusinessCombinationsTables" roleURI="http://www.zoominfo.com/role/BusinessCombinationsTables">
        <link:definition>2312302 - Disclosure - Business Combinations (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="BusinessCombinationsNarrativeDetails" roleURI="http://www.zoominfo.com/role/BusinessCombinationsNarrativeDetails">
        <link:definition>2413406 - Disclosure - Business Combinations - Narrative (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="BusinessCombinationsAcquisitionDateFairValueofConsiderationTransferredDetails" roleURI="http://www.zoominfo.com/role/BusinessCombinationsAcquisitionDateFairValueofConsiderationTransferredDetails">
        <link:definition>2414407 - Disclosure - Business Combinations - Acquisition Date Fair Value of Consideration Transferred (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="BusinessCombinationsFairValuesofAssetsAcquiredandLiabilitiesAssumedDetails" roleURI="http://www.zoominfo.com/role/BusinessCombinationsFairValuesofAssetsAcquiredandLiabilitiesAssumedDetails">
        <link:definition>2415408 - Disclosure - Business Combinations - Fair Values of Assets Acquired and Liabilities Assumed (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="BusinessCombinationsComponentsofIdentifiableIntangibleAssetsAcquiredDetails" roleURI="http://www.zoominfo.com/role/BusinessCombinationsComponentsofIdentifiableIntangibleAssetsAcquiredDetails">
        <link:definition>2416409 - Disclosure - Business Combinations - Components of Identifiable Intangible Assets Acquired (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="BusinessCombinationsProFormaRevenueandEarningsofAcquisitionDetails" roleURI="http://www.zoominfo.com/role/BusinessCombinationsProFormaRevenueandEarningsofAcquisitionDetails">
        <link:definition>2417410 - Disclosure - Business Combinations - Pro Forma Revenue and Earnings of Acquisition (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="CashCashEquivalentsandShorttermInvestments" roleURI="http://www.zoominfo.com/role/CashCashEquivalentsandShorttermInvestments">
        <link:definition>2118105 - Disclosure - Cash, Cash Equivalents, and Short-term Investments</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="CashCashEquivalentsandShorttermInvestmentsTables" roleURI="http://www.zoominfo.com/role/CashCashEquivalentsandShorttermInvestmentsTables">
        <link:definition>2319303 - Disclosure - Cash, Cash Equivalents, and Short-term Investments (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="CashCashEquivalentsandShorttermInvestmentsComponentsDetails" roleURI="http://www.zoominfo.com/role/CashCashEquivalentsandShorttermInvestmentsComponentsDetails">
        <link:definition>2420411 - Disclosure - Cash, Cash Equivalents, and Short-term Investments - Components (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="CashCashEquivalentsandShorttermInvestmentsDebtSecuritiesAvailableforsaleUnrealizedLossPositionFairValueDetails" roleURI="http://www.zoominfo.com/role/CashCashEquivalentsandShorttermInvestmentsDebtSecuritiesAvailableforsaleUnrealizedLossPositionFairValueDetails">
        <link:definition>2421412 - Disclosure - Cash, Cash Equivalents, and Short-term Investments - Debt Securities, Available-for-sale, Unrealized Loss Position, Fair Value (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="CashCashEquivalentsandShorttermInvestmentsCostandEstimatedFairValueDetails" roleURI="http://www.zoominfo.com/role/CashCashEquivalentsandShorttermInvestmentsCostandEstimatedFairValueDetails">
        <link:definition>2422413 - Disclosure - Cash, Cash Equivalents, and Short-term Investments - Cost and Estimated Fair Value (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="PropertyandEquipment" roleURI="http://www.zoominfo.com/role/PropertyandEquipment">
        <link:definition>2123106 - Disclosure - Property and Equipment</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="PropertyandEquipmentTables" roleURI="http://www.zoominfo.com/role/PropertyandEquipmentTables">
        <link:definition>2324304 - Disclosure - Property and Equipment (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="PropertyandEquipmentDetails" roleURI="http://www.zoominfo.com/role/PropertyandEquipmentDetails">
        <link:definition>2425414 - Disclosure - Property and Equipment (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="GoodwillandAcquiredIntangibleAssets" roleURI="http://www.zoominfo.com/role/GoodwillandAcquiredIntangibleAssets">
        <link:definition>2126107 - Disclosure - Goodwill and Acquired Intangible Assets</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="GoodwillandAcquiredIntangibleAssetsTables" roleURI="http://www.zoominfo.com/role/GoodwillandAcquiredIntangibleAssetsTables">
        <link:definition>2327305 - Disclosure - Goodwill and Acquired Intangible Assets (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="GoodwillandAcquiredIntangibleAssetsIntangibleAssetsDetails" roleURI="http://www.zoominfo.com/role/GoodwillandAcquiredIntangibleAssetsIntangibleAssetsDetails">
        <link:definition>2428415 - Disclosure - Goodwill and Acquired Intangible Assets - Intangible 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="GoodwillandAcquiredIntangibleAssetsFutureAmortizationExpenseDetails" roleURI="http://www.zoominfo.com/role/GoodwillandAcquiredIntangibleAssetsFutureAmortizationExpenseDetails">
        <link:definition>2429416 - Disclosure - Goodwill and Acquired Intangible Assets - Future Amortization 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="GoodwillandAcquiredIntangibleAssetsChangestoGoodwillDetails" roleURI="http://www.zoominfo.com/role/GoodwillandAcquiredIntangibleAssetsChangestoGoodwillDetails">
        <link:definition>2430417 - Disclosure - Goodwill and Acquired Intangible Assets - Changes to Goodwill (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="FinancingArrangements" roleURI="http://www.zoominfo.com/role/FinancingArrangements">
        <link:definition>2131108 - Disclosure - Financing Arrangements</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="FinancingArrangementsTables" roleURI="http://www.zoominfo.com/role/FinancingArrangementsTables">
        <link:definition>2332306 - Disclosure - Financing Arrangements (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="FinancingArrangementsCarryingValuesofBorrowingsDetails" roleURI="http://www.zoominfo.com/role/FinancingArrangementsCarryingValuesofBorrowingsDetails">
        <link:definition>2433418 - Disclosure - Financing Arrangements - Carrying Values of Borrowings (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="FinancingArrangementsNarrativeDetails" roleURI="http://www.zoominfo.com/role/FinancingArrangementsNarrativeDetails">
        <link:definition>2434419 - Disclosure - Financing Arrangements - Narrative (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="FinancingArrangementsExpectedFuturePrincipalPaymentsforBorrowingsDetails" roleURI="http://www.zoominfo.com/role/FinancingArrangementsExpectedFuturePrincipalPaymentsforBorrowingsDetails">
        <link:definition>2435420 - Disclosure - Financing Arrangements - Expected Future Principal Payments for Borrowings (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="FinancingArrangementsExpectedFuturePrincipalPaymentsforBorrowingsDetails_1" roleURI="http://www.zoominfo.com/role/FinancingArrangementsExpectedFuturePrincipalPaymentsforBorrowingsDetails_1">
        <link:definition>2435420 - Disclosure - Financing Arrangements - Expected Future Principal Payments for Borrowings (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="DerivativesandHedgingActivities" roleURI="http://www.zoominfo.com/role/DerivativesandHedgingActivities">
        <link:definition>2136109 - Disclosure - Derivatives and Hedging Activities</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="DerivativesandHedgingActivitiesTables" roleURI="http://www.zoominfo.com/role/DerivativesandHedgingActivitiesTables">
        <link:definition>2337307 - Disclosure - Derivatives and Hedging Activities (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="DerivativesandHedgingActivitiesNarrativeDetails" roleURI="http://www.zoominfo.com/role/DerivativesandHedgingActivitiesNarrativeDetails">
        <link:definition>2438421 - Disclosure - Derivatives and Hedging Activities - Narrative (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="DerivativesandHedgingActivitiesOutstandingInterestRateDerivativesDesignatedasCashFlowHedgesofInterestRateRiskDetails" roleURI="http://www.zoominfo.com/role/DerivativesandHedgingActivitiesOutstandingInterestRateDerivativesDesignatedasCashFlowHedgesofInterestRateRiskDetails">
        <link:definition>2439422 - Disclosure - Derivatives and Hedging Activities - Outstanding Interest Rate Derivatives Designated as Cash Flow Hedges of Interest Rate Risk (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="DerivativesandHedgingActivitiesFairValueandPresentationintheConsolidatedBalanceSheetsforDerivativesDetails" roleURI="http://www.zoominfo.com/role/DerivativesandHedgingActivitiesFairValueandPresentationintheConsolidatedBalanceSheetsforDerivativesDetails">
        <link:definition>2440423 - Disclosure - Derivatives and Hedging Activities - Fair Value and Presentation in the Consolidated Balance Sheets for Derivatives (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="FairValue" roleURI="http://www.zoominfo.com/role/FairValue">
        <link:definition>2141110 - Disclosure - Fair Value</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="FairValueTables" roleURI="http://www.zoominfo.com/role/FairValueTables">
        <link:definition>2342308 - Disclosure - Fair Value (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="FairValueDetails" roleURI="http://www.zoominfo.com/role/FairValueDetails">
        <link:definition>2443424 - Disclosure - Fair Value (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="CommitmentandContingencies" roleURI="http://www.zoominfo.com/role/CommitmentandContingencies">
        <link:definition>2144111 - Disclosure - Commitment 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="CommitmentandContingenciesTables" roleURI="http://www.zoominfo.com/role/CommitmentandContingenciesTables">
        <link:definition>2345309 - Disclosure - Commitment 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="CommitmentandContingenciesDetails" roleURI="http://www.zoominfo.com/role/CommitmentandContingenciesDetails">
        <link:definition>2446425 - Disclosure - Commitment 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="StockholdersEquityandMembersDeficit" roleURI="http://www.zoominfo.com/role/StockholdersEquityandMembersDeficit">
        <link:definition>2147112 - Disclosure - Stockholders' Equity and Members' Deficit</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="StockholdersEquityandMembersDeficitDetails" roleURI="http://www.zoominfo.com/role/StockholdersEquityandMembersDeficitDetails">
        <link:definition>2448426 - Disclosure - Stockholders' Equity and Members' Deficit (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="RedeemableSeriesAPreferredUnits" roleURI="http://www.zoominfo.com/role/RedeemableSeriesAPreferredUnits">
        <link:definition>2149113 - Disclosure - Redeemable Series A Preferred Units</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="RedeemableSeriesAPreferredUnitsDetails" roleURI="http://www.zoominfo.com/role/RedeemableSeriesAPreferredUnitsDetails">
        <link:definition>2450427 - Disclosure - Redeemable Series A Preferred Units (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="EarningsPerShare" roleURI="http://www.zoominfo.com/role/EarningsPerShare">
        <link:definition>2151114 - 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="EarningsPerShareTables" roleURI="http://www.zoominfo.com/role/EarningsPerShareTables">
        <link:definition>2352310 - 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="EarningsPerShareBasicandDilutedNetLossPerShareDetails" roleURI="http://www.zoominfo.com/role/EarningsPerShareBasicandDilutedNetLossPerShareDetails">
        <link:definition>2453428 - Disclosure - Earnings Per Share - Basic and Diluted Net Loss 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="EarningsPerSharePotentialCommonStockEquivalentsExcludedfromCalculationofDilutedNetLossPerShareDetails" roleURI="http://www.zoominfo.com/role/EarningsPerSharePotentialCommonStockEquivalentsExcludedfromCalculationofDilutedNetLossPerShareDetails">
        <link:definition>2454429 - Disclosure - Earnings Per Share - Potential Common Stock Equivalents Excluded from Calculation of Diluted Net Loss 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="Leases" roleURI="http://www.zoominfo.com/role/Leases">
        <link:definition>2155115 - Disclosure - Leases</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="LeasesTables" roleURI="http://www.zoominfo.com/role/LeasesTables">
        <link:definition>2356311 - Disclosure - Leases (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="LeasesNarrativeDetails" roleURI="http://www.zoominfo.com/role/LeasesNarrativeDetails">
        <link:definition>2457430 - Disclosure - Leases - Narrative (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="LeasesAdditionalDetailsRelatedtoLeasesRecordedontheBalanceSheetDetails" roleURI="http://www.zoominfo.com/role/LeasesAdditionalDetailsRelatedtoLeasesRecordedontheBalanceSheetDetails">
        <link:definition>2458431 - Disclosure - Leases - Additional Details Related to Leases Recorded on the Balance Sheet (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="LeasesOtherInformationRelatedtoLeasesDetails" roleURI="http://www.zoominfo.com/role/LeasesOtherInformationRelatedtoLeasesDetails">
        <link:definition>2459432 - Disclosure - Leases - Other Information Related to Leases (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="LeasesUndiscountedFutureMinimumPaymentsUnderNonCancellableLeasesDetails" roleURI="http://www.zoominfo.com/role/LeasesUndiscountedFutureMinimumPaymentsUnderNonCancellableLeasesDetails">
        <link:definition>2460433 - Disclosure - Leases - Undiscounted Future Minimum Payments Under Non-Cancellable Leases (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="LeasesUndiscountedFutureMinimumPaymentsUnderNonCancellableLeasesDetails_1" roleURI="http://www.zoominfo.com/role/LeasesUndiscountedFutureMinimumPaymentsUnderNonCancellableLeasesDetails_1">
        <link:definition>2460433 - Disclosure - Leases - Undiscounted Future Minimum Payments Under Non-Cancellable Leases (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="EquitybasedCompensation" roleURI="http://www.zoominfo.com/role/EquitybasedCompensation">
        <link:definition>2161116 - Disclosure - Equity-based Compensation</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="EquitybasedCompensationTables" roleURI="http://www.zoominfo.com/role/EquitybasedCompensationTables">
        <link:definition>2362312 - Disclosure - Equity-based Compensation (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="EquitybasedCompensationNarrativeDetails" roleURI="http://www.zoominfo.com/role/EquitybasedCompensationNarrativeDetails">
        <link:definition>2463434 - Disclosure - Equity-based Compensation - Narrative (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="EquitybasedCompensationRestrictedStockUnitsActivityDetails" roleURI="http://www.zoominfo.com/role/EquitybasedCompensationRestrictedStockUnitsActivityDetails">
        <link:definition>2464435 - Disclosure - Equity-based Compensation - Restricted Stock Units Activity (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="EquitybasedCompensationClassACommonStockOptionsActivityDetails" roleURI="http://www.zoominfo.com/role/EquitybasedCompensationClassACommonStockOptionsActivityDetails">
        <link:definition>2465436 - Disclosure - Equity-based Compensation - Class A Common Stock Options Activity (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="EquitybasedCompensationScheduleofValuationAssumptionsDetails" roleURI="http://www.zoominfo.com/role/EquitybasedCompensationScheduleofValuationAssumptionsDetails">
        <link:definition>2466437 - Disclosure - Equity-based Compensation - Schedule of Valuation Assumptions (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="EquitybasedCompensationHoldCoUnitActivityDetails" roleURI="http://www.zoominfo.com/role/EquitybasedCompensationHoldCoUnitActivityDetails">
        <link:definition>2467438 - Disclosure - Equity-based Compensation - HoldCo Unit Activity (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="EquitybasedCompensationOpCoUnitActivityDetails" roleURI="http://www.zoominfo.com/role/EquitybasedCompensationOpCoUnitActivityDetails">
        <link:definition>2468439 - Disclosure - Equity-based Compensation - OpCo Unit Activity (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="EquitybasedCompensationClassPUnitsActivityDetails" roleURI="http://www.zoominfo.com/role/EquitybasedCompensationClassPUnitsActivityDetails">
        <link:definition>2469440 - Disclosure - Equity-based Compensation - Class P Units Activity (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="EquitybasedCompensationLTIPUnitsActivityDetails" roleURI="http://www.zoominfo.com/role/EquitybasedCompensationLTIPUnitsActivityDetails">
        <link:definition>2470441 - Disclosure - Equity-based Compensation - LTIP Units Activity (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="EquitybasedCompensationEquitybasedCompensationExpenseandSummaryofUnamortizedEquityBasedCompensationCostsDetails" roleURI="http://www.zoominfo.com/role/EquitybasedCompensationEquitybasedCompensationExpenseandSummaryofUnamortizedEquityBasedCompensationCostsDetails">
        <link:definition>2471442 - Disclosure - Equity-based Compensation - Equity-based Compensation Expense and Summary of Unamortized Equity-Based Compensation Costs (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="SegmentandGeographicData" roleURI="http://www.zoominfo.com/role/SegmentandGeographicData">
        <link:definition>2172117 - Disclosure - Segment and Geographic Data</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="SegmentandGeographicDataTables" roleURI="http://www.zoominfo.com/role/SegmentandGeographicDataTables">
        <link:definition>2373313 - Disclosure - Segment and Geographic Data (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="SegmentandGeographicDataDetails" roleURI="http://www.zoominfo.com/role/SegmentandGeographicDataDetails">
        <link:definition>2474443 - Disclosure - Segment and Geographic Data (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="TaxReceivableAgreements" roleURI="http://www.zoominfo.com/role/TaxReceivableAgreements">
        <link:definition>2175118 - Disclosure - Tax Receivable Agreements</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="TaxReceivableAgreementsDetails" roleURI="http://www.zoominfo.com/role/TaxReceivableAgreementsDetails">
        <link:definition>2476444 - Disclosure - Tax Receivable 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="IncomeTaxes" roleURI="http://www.zoominfo.com/role/IncomeTaxes">
        <link:definition>2177119 - 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="IncomeTaxesTables" roleURI="http://www.zoominfo.com/role/IncomeTaxesTables">
        <link:definition>2378314 - 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="IncomeTaxesScheduleofIncomeTaxesDetails" roleURI="http://www.zoominfo.com/role/IncomeTaxesScheduleofIncomeTaxesDetails">
        <link:definition>2479445 - Disclosure - Income Taxes - Schedule of Income Taxes (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="IncomeTaxesScheduleofEffectiveIncomeTaxReconciliationDetails" roleURI="http://www.zoominfo.com/role/IncomeTaxesScheduleofEffectiveIncomeTaxReconciliationDetails">
        <link:definition>2480446 - Disclosure - Income Taxes - Schedule of Effective Income Tax Reconciliation (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="IncomeTaxesDeferredTaxAssetsandLiabilitiesDetails" roleURI="http://www.zoominfo.com/role/IncomeTaxesDeferredTaxAssetsandLiabilitiesDetails">
        <link:definition>2481447 - Disclosure - Income Taxes - Deferred Tax Assets and 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="IncomeTaxesNarrativeDetails" roleURI="http://www.zoominfo.com/role/IncomeTaxesNarrativeDetails">
        <link:definition>2482448 - Disclosure - Income Taxes - Narrative (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="SubsequentEvents" roleURI="http://www.zoominfo.com/role/SubsequentEvents">
        <link:definition>2183120 - 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="SubsequentEventsDetails" roleURI="http://www.zoominfo.com/role/SubsequentEventsDetails">
        <link:definition>2484449 - 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="zi_NonCancelableLeaseAgreementTerm" abstract="false" name="NonCancelableLeaseAgreementTerm" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="zi_CapitalAllocatedForFutureDistribution" abstract="false" name="CapitalAllocatedForFutureDistribution" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="zi_ZoomInfoHoldCoMember" abstract="true" name="ZoomInfoHoldCoMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="zi_DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNetYearFour" abstract="false" name="DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNetYearFour" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="zi_BusinessCombinationContingentEarnOutPayments" abstract="false" name="BusinessCombinationContingentEarnOutPayments" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="zi_TemporaryEquityDisclosureTextBlock" abstract="false" name="TemporaryEquityDisclosureTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType"/>
  <xs:element id="zi_BusinessCombinationPurchaseConsiderationLiabilitiesOther" abstract="false" name="BusinessCombinationPurchaseConsiderationLiabilitiesOther" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="zi_DeferredTaxAssetsInterestExpenseCarryforward" abstract="false" name="DeferredTaxAssetsInterestExpenseCarryforward" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="zi_Class1UnitMember" abstract="true" name="Class1UnitMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="zi_StockIssuedDuringPeriodNoncontrollingInterestIncreaseFromBusinessCombination" abstract="false" name="StockIssuedDuringPeriodNoncontrollingInterestIncreaseFromBusinessCombination" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="zi_LongTermDebtBeforeDiscountsAndIssuanceCostsMaturityYearFive" abstract="false" name="LongTermDebtBeforeDiscountsAndIssuanceCostsMaturityYearFive" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="zi_CashCashEquivalentsAndShortTermInvestmentsPolicyPolicyTextBlock" abstract="false" name="CashCashEquivalentsAndShortTermInvestmentsPolicyPolicyTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType"/>
  <xs:element id="zi_PostIPOAwardsMember" abstract="true" name="PostIPOAwardsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="zi_AccruedLiabilitiesCurrentMember" abstract="true" name="AccruedLiabilitiesCurrentMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="zi_PreAcquisitionZoomInformationIncMember" abstract="true" name="PreAcquisitionZoomInformationIncMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="zi_LongTermDebtBeforeDiscountsAndIssuanceCostsMaturityYearThree" abstract="false" name="LongTermDebtBeforeDiscountsAndIssuanceCostsMaturityYearThree" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="zi_HSKBIIClass1UnitsMember" abstract="true" name="HSKBIIClass1UnitsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="zi_CashVestingPaymentProgramMember" abstract="true" name="CashVestingPaymentProgramMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="zi_DebtInstrumentAmountNotRedesignatedForWhichForecastedInterestPaymentsAreNotProbableToOccur" abstract="false" name="DebtInstrumentAmountNotRedesignatedForWhichForecastedInterestPaymentsAreNotProbableToOccur" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="zi_AmortizationOfOtherIntangibleAssets" abstract="false" name="AmortizationOfOtherIntangibleAssets" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="zi_MarketabilityDiscount" abstract="false" name="MarketabilityDiscount" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="num:percentItemType"/>
  <xs:element id="zi_APICShareBasedCompensationIncreaseForCostOfRecognitionPriorToReorganization" abstract="false" name="APICShareBasedCompensationIncreaseForCostOfRecognitionPriorToReorganization" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="zi_EmployeeIncentiveProgramMember" abstract="true" name="EmployeeIncentiveProgramMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="zi_ForwardStartingInterestRateSwapMember" abstract="true" name="ForwardStartingInterestRateSwapMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="zi_DebtInstrumentCovenantLeverageRatioMaximum" abstract="false" name="DebtInstrumentCovenantLeverageRatioMaximum" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:pureItemType"/>
  <xs:element id="zi_AssetsAndLiabilitiesLesseeTableTextBlock" abstract="false" name="AssetsAndLiabilitiesLesseeTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType"/>
  <xs:element id="zi_EffectiveIncomeTaxRateReconciliationShiftOfGAAPBasisToTaxableEntity" abstract="false" name="EffectiveIncomeTaxRateReconciliationShiftOfGAAPBasisToTaxableEntity" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="num:percentItemType"/>
  <xs:element id="zi_StockIssuedDuringPeriodValueNoncontrollingInterestIncreaseFromBusinessCombination" abstract="false" name="StockIssuedDuringPeriodValueNoncontrollingInterestIncreaseFromBusinessCombination" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="zi_StockIssuedDuringPeriodSharesPurchaseOfUnits" abstract="false" name="StockIssuedDuringPeriodSharesPurchaseOfUnits" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="zi_ConversionRatioToClassACommonStock" abstract="false" name="ConversionRatioToClassACommonStock" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:pureItemType"/>
  <xs:element id="zi_CostOfGoodsAndServiceIncludingDepreciationAndExcludingAmortization" abstract="false" name="CostOfGoodsAndServiceIncludingDepreciationAndExcludingAmortization" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="zi_BusinessCombinationDeferredConsiderationCurrent" abstract="false" name="BusinessCombinationDeferredConsiderationCurrent" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="zi_CapitalAllocatedForFutureDistributionDistributionTerm" abstract="false" name="CapitalAllocatedForFutureDistributionDistributionTerm" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="zi_PaymentsForRentPerSquareFoot" abstract="false" name="PaymentsForRentPerSquareFoot" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="srt-types:perUnitItemType"/>
  <xs:element id="zi_HSKBIClass1UnitsMember" abstract="true" name="HSKBIClass1UnitsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="zi_LTIPUnitsMember" abstract="true" name="LTIPUnitsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="zi_TaxReceivableAgreementsDisclosureTextBlock" abstract="false" name="TaxReceivableAgreementsDisclosureTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType"/>
  <xs:element id="zi_RightOfUseAssetObtainedInExchangeForOperatingLeaseLiabilityAndAdjustments" abstract="false" name="RightOfUseAssetObtainedInExchangeForOperatingLeaseLiabilityAndAdjustments" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="zi_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParentPriorToReorganization" abstract="false" name="OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParentPriorToReorganization" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="zi_LessorOperatingLeaseRemainingSubleaseTerm" abstract="false" name="LessorOperatingLeaseRemainingSubleaseTerm" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="zi_OrganizationConsolidationAndPresentationOfFinancialStatementsLineItems" abstract="true" name="OrganizationConsolidationAndPresentationOfFinancialStatementsLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="zi_CommonStockNumberOfVotesPerShareHeld" abstract="false" name="CommonStockNumberOfVotesPerShareHeld" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="zi_NoncashInvestingAndFinancingActivitiesIssuanceCostReimbursementsIncludedInAccountsReceivable" abstract="false" name="NoncashInvestingAndFinancingActivitiesIssuanceCostReimbursementsIncludedInAccountsReceivable" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="zi_LongTermDebtBeforeDiscountsAndIssuanceCostsMaturityYearFour" abstract="false" name="LongTermDebtBeforeDiscountsAndIssuanceCostsMaturityYearFour" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="zi_RedeemableSeriesAPreferredUnitsMember" abstract="true" name="RedeemableSeriesAPreferredUnitsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="zi_DefinedContributionPlanVestingTerm" abstract="false" name="DefinedContributionPlanVestingTerm" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="zi_ClassPUnitsMember" abstract="true" name="ClassPUnitsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="zi_StockholdersEquityIncreaseDecreaseInSharesDueToExchange" abstract="false" name="StockholdersEquityIncreaseDecreaseInSharesDueToExchange" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="zi_ShareBasedCompensationArrangementByShareBasedPaymentAwardIncreaseToAuthorizedSharesBasedOnStockOutstandingPercentage" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardIncreaseToAuthorizedSharesBasedOnStockOutstandingPercentage" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="num:percentItemType"/>
  <xs:element id="zi_WeightAppliedToIPOScenario" abstract="false" name="WeightAppliedToIPOScenario" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="num:percentItemType"/>
  <xs:element id="zi_SecondLienTermLoanMember" abstract="true" name="SecondLienTermLoanMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="zi_NetRentedAreaWithPlansToExtend" abstract="false" name="NetRentedAreaWithPlansToExtend" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="num:areaItemType"/>
  <xs:element id="zi_StockIssuedDuringPeriodValueExchange" abstract="false" name="StockIssuedDuringPeriodValueExchange" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="zi_BusinessCombinationUnearnedRevenueRecognitionPeriod" abstract="false" name="BusinessCombinationUnearnedRevenueRecognitionPeriod" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="zi_BusinessCombinationPortionOfReplacementAwardsAttributableToPreAcquisitionService" abstract="false" name="BusinessCombinationPortionOfReplacementAwardsAttributableToPreAcquisitionService" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="zi_IncrementalCommonSharesAttributableToDilutiveEffectOfConversionOfCommonStock" abstract="false" name="IncrementalCommonSharesAttributableToDilutiveEffectOfConversionOfCommonStock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="zi_DeferredSalesCommissionsAmortizationPeriod" abstract="false" name="DeferredSalesCommissionsAmortizationPeriod" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="zi_BusinessAcquisitionProFormaIncomeLossBeforeIncomeTaxes" abstract="false" name="BusinessAcquisitionProFormaIncomeLossBeforeIncomeTaxes" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="zi_PercentOfClassBAndClassCAsOutstandingCommonStockVotingRights" abstract="false" name="PercentOfClassBAndClassCAsOutstandingCommonStockVotingRights" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="num:percentItemType"/>
  <xs:element id="zi_StockholdersEquityIncreaseDecreaseInSharesDueToExchangeValue" abstract="false" name="StockholdersEquityIncreaseDecreaseInSharesDueToExchangeValue" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="zi_PreIPOAwardsMember" abstract="true" name="PreIPOAwardsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="zi_AccountingPoliciesTable" abstract="true" name="AccountingPoliciesTable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType"/>
  <xs:element id="zi_BusinessCombinationConsiderationTransferredIncentiveCompensation" abstract="false" name="BusinessCombinationConsiderationTransferredIncentiveCompensation" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="zi_BusinessCombinationDeferredConsiderationNoncurrent" abstract="false" name="BusinessCombinationDeferredConsiderationNoncurrent" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="zi_AccountingPoliciesLineItems" abstract="true" name="AccountingPoliciesLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="zi_NetRentedArea" abstract="false" name="NetRentedArea" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="num:areaItemType"/>
  <xs:element id="zi_CommonUnitsMember" abstract="true" name="CommonUnitsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="zi_UndistributedEarningsDilutedIncreaseDecreaseInEarningsUponConversionOfPotentiallyDilutiveInstruments" abstract="false" name="UndistributedEarningsDilutedIncreaseDecreaseInEarningsUponConversionOfPotentiallyDilutiveInstruments" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="zi_ShareBasedCompensationArrangementByShareBasedPaymentAwardPerformanceVestingConditionPercentage" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardPerformanceVestingConditionPercentage" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="num:percentItemType"/>
  <xs:element id="zi_TaxReceivableAgreementsPolicyPolicyTextBlock" abstract="false" name="TaxReceivableAgreementsPolicyPolicyTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType"/>
  <xs:element id="zi_TaxReceivableAgreementProjectedObligation" abstract="false" name="TaxReceivableAgreementProjectedObligation" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="zi_ScheduleOfAcquiredAssetsByMajorClassLineItems" abstract="true" name="ScheduleOfAcquiredAssetsByMajorClassLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="zi_OtherComprehensiveIncomeLossNetOfTaxPriorToReorganization" abstract="false" name="OtherComprehensiveIncomeLossNetOfTaxPriorToReorganization" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="zi_A2019PhantomUnitPlanMember" abstract="true" name="A2019PhantomUnitPlanMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="zi_NumberOfOffices" abstract="false" name="NumberOfOffices" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="zi_LongTermDebtBeforeDiscountsAndIssuanceCostsMaturityAfterYearFive" abstract="false" name="LongTermDebtBeforeDiscountsAndIssuanceCostsMaturityAfterYearFive" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="zi_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentDeferredRevenue" abstract="false" name="BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentDeferredRevenue" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="zi_TaxReceivableAgreementCashSavingsRealizedPercentage" abstract="false" name="TaxReceivableAgreementCashSavingsRealizedPercentage" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="num:percentItemType"/>
  <xs:element id="zi_CommonUnitsPeriodUntilLiquidation" abstract="false" name="CommonUnitsPeriodUntilLiquidation" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="zi_BrandPortfolioMember" abstract="true" name="BrandPortfolioMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="zi_PercentOfClassBAndClassCAsOutstandingCommonStockConversionRights" abstract="false" name="PercentOfClassBAndClassCAsOutstandingCommonStockConversionRights" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="num:percentItemType"/>
  <xs:element id="zi_ExcessConsiderationPaidToHoldersOfPreferredUnitsAttributableToCommonShares" abstract="false" name="ExcessConsiderationPaidToHoldersOfPreferredUnitsAttributableToCommonShares" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="zi_PhantomUnitsMember" abstract="true" name="PhantomUnitsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="zi_DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNetYearOne" abstract="false" name="DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNetYearOne" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="zi_DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNetYearFive" abstract="false" name="DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNetYearFive" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="zi_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOperatingLeaseRightOfUseAssets" abstract="false" name="BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOperatingLeaseRightOfUseAssets" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="zi_ShareBasedCompensationByShareBasedPaymentAwardPeriodToSettleAwards" abstract="false" name="ShareBasedCompensationByShareBasedPaymentAwardPeriodToSettleAwards" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="zi_ScheduleOfAcquiredAssetsByMajorClassTable" abstract="true" name="ScheduleOfAcquiredAssetsByMajorClassTable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType"/>
  <xs:element id="zi_BenefitRetainedAsPercentOfNetCashSavings" abstract="false" name="BenefitRetainedAsPercentOfNetCashSavings" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="num:percentItemType"/>
  <xs:element id="zi_ConversionOfStockWeightedAverageGrantDateFairValue" abstract="false" name="ConversionOfStockWeightedAverageGrantDateFairValue" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="num:perShareItemType"/>
  <xs:element id="zi_BusinessAcquisitionProFormaTransactionCostsAndBonuses" abstract="false" name="BusinessAcquisitionProFormaTransactionCostsAndBonuses" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="zi_UndistributedEarningsDilutedReallocationOfEarningsUponConversionOfPotentiallyDilutiveInstruments" abstract="false" name="UndistributedEarningsDilutedReallocationOfEarningsUponConversionOfPotentiallyDilutiveInstruments" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="zi_OrganizationConsolidationAndPresentationOfFinancialStatementsTable" abstract="true" name="OrganizationConsolidationAndPresentationOfFinancialStatementsTable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType"/>
  <xs:element id="zi_EquityMethodInvestmentOwnershipPercentageOfUnits" abstract="false" name="EquityMethodInvestmentOwnershipPercentageOfUnits" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="num:percentItemType"/>
  <xs:element id="zi_ShareBasedCompensationArrangementByShareBasedPaymentAwardEconomicEquivalentOfAwardGrantedShares" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardEconomicEquivalentOfAwardGrantedShares" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="zi_DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNetAfterYearFive" abstract="false" name="DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNetAfterYearFive" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="zi_EmailVerificationServiceMember" abstract="true" name="EmailVerificationServiceMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="zi_HoldCoUnitsMember" abstract="true" name="HoldCoUnitsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="zi_FiniteAndIndefiniteLivedIntangibleAssetsAcquired" abstract="false" name="FiniteAndIndefiniteLivedIntangibleAssetsAcquired" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="zi_TaxReceivableAgreementsAbstract" abstract="true" name="TaxReceivableAgreementsAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="zi_StockIssuedDuringPeriodValuePurchaseOfUnits" abstract="false" name="StockIssuedDuringPeriodValuePurchaseOfUnits" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="zi_LongTermDebtByMaturityGrossAbstract" abstract="true" name="LongTermDebtByMaturityGrossAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="zi_LongTermDebtBeforeDiscountsAndIssuanceCostsMaturityYearOne" abstract="false" name="LongTermDebtBeforeDiscountsAndIssuanceCostsMaturityYearOne" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="zi_OtherComprehensiveIncomeLossCashFlowHedgeEffectOfDeDesignationOfHedgeAfterTax" abstract="false" name="OtherComprehensiveIncomeLossCashFlowHedgeEffectOfDeDesignationOfHedgeAfterTax" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="zi_StockIssuedDuringPeriodSharesExchange" abstract="false" name="StockIssuedDuringPeriodSharesExchange" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="zi_BusinessCombinationContingentConsiderationExpense" abstract="false" name="BusinessCombinationContingentConsiderationExpense" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="zi_NetIncomeLossAttributableToParentSubsequentToReorganization" abstract="false" name="NetIncomeLossAttributableToParentSubsequentToReorganization" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="zi_NetIncomeLossAttributableToParentPriorToReorganization" abstract="false" name="NetIncomeLossAttributableToParentPriorToReorganization" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="zi_LongTermDebtByMaturityDiscountsAndIssuanceCostsAbstract" abstract="true" name="LongTermDebtByMaturityDiscountsAndIssuanceCostsAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="zi_NumberOfTaxReceivableAgreements" abstract="false" name="NumberOfTaxReceivableAgreements" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="zi_UndistributedEarningsDilutedReallocationOfEarningsUponConversionOfCommonStock" abstract="false" name="UndistributedEarningsDilutedReallocationOfEarningsUponConversionOfCommonStock" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="zi_PreAcquisitionBrandPortfolioMember" abstract="true" name="PreAcquisitionBrandPortfolioMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="zi_DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNetYearThree" abstract="false" name="DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNetYearThree" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="zi_KomikoLTDMember" abstract="true" name="KomikoLTDMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="zi_TemporaryEquityExcessDueUponEarlyRedemptionCommonStock" abstract="false" name="TemporaryEquityExcessDueUponEarlyRedemptionCommonStock" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="zi_ModificationToShareBasedCompensationArrangementNumberOfGranteesAffected" abstract="false" name="ModificationToShareBasedCompensationArrangementNumberOfGranteesAffected" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="zi_BlockerMergersMember" abstract="true" name="BlockerMergersMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="zi_A2020BusinessAcquisitionsMember" abstract="true" name="A2020BusinessAcquisitionsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="zi_FirstLienTermLoanMember" abstract="true" name="FirstLienTermLoanMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="zi_BusinessCombinationLiabilityIncurredForEquityAwardSettlement" abstract="false" name="BusinessCombinationLiabilityIncurredForEquityAwardSettlement" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="zi_TaxReceivableAgreementTaxBenefitsRealizedWhichMustThenBePaidPercentage" abstract="false" name="TaxReceivableAgreementTaxBenefitsRealizedWhichMustThenBePaidPercentage" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="num:percentItemType"/>
  <xs:element id="zi_ShareBasedCompensationArrangementByShareBasedPaymentAwardStockAwardConversionIncrementalGrantDateFairValue" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardStockAwardConversionIncrementalGrantDateFairValue" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="zi_OmnibusIncentivePlan2020Member" abstract="true" name="OmnibusIncentivePlan2020Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="zi_RevenueFromContractWithCustomerTermOfContract" abstract="false" name="RevenueFromContractWithCustomerTermOfContract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="zi_NumberOfCustomersServed" abstract="false" name="NumberOfCustomersServed" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="zi_IncreaseDecreaseInPrepaidExpenseAndOtherAssetsCurrent" abstract="false" name="IncreaseDecreaseInPrepaidExpenseAndOtherAssetsCurrent" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="zi_ShareBasedPaymentArrangementNonvestedAwardExcludingOptionCostNotYetRecognizedAmountIncreaseDecrease" abstract="false" name="ShareBasedPaymentArrangementNonvestedAwardExcludingOptionCostNotYetRecognizedAmountIncreaseDecrease" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="zi_DebtSecuritiesAvailableForSaleAmortizedCostAfterAllowanceForCreditLoss" abstract="false" name="DebtSecuritiesAvailableForSaleAmortizedCostAfterAllowanceForCreditLoss" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="zi_GainLossOnExtinguishmentOfDebtIncludingWriteOffOfUnamortizedIssuanceCostsAndPrepaymentPenalty" abstract="false" name="GainLossOnExtinguishmentOfDebtIncludingWriteOffOfUnamortizedIssuanceCostsAndPrepaymentPenalty" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="zi_SaleOfStockInConnectionWithAcquisitionMember" abstract="true" name="SaleOfStockInConnectionWithAcquisitionMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="zi_ZoomInfoOpCoMember" abstract="true" name="ZoomInfoOpCoMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="zi_APICShareBasedCompensationIncreaseForCostOfRecognitionSubsequentToReorganization" abstract="false" name="APICShareBasedCompensationIncreaseForCostOfRecognitionSubsequentToReorganization" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="zi_BusinessCombinationDeferredConsideration" abstract="false" name="BusinessCombinationDeferredConsideration" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="zi_TaxReceivableAgreementRemeasurement" abstract="false" name="TaxReceivableAgreementRemeasurement" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="zi_OpCoUnitsMember" abstract="true" name="OpCoUnitsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="zi_LongTermDebtBeforeDiscountsAndIssuanceCostsMaturityYearTwo" abstract="false" name="LongTermDebtBeforeDiscountsAndIssuanceCostsMaturityYearTwo" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="zi_TemporaryEquityExcessDueUponEarlyRedemptionNoncontrollingInterests" abstract="false" name="TemporaryEquityExcessDueUponEarlyRedemptionNoncontrollingInterests" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="zi_BusinessCombinationContingentConsiderationPotentialFuturePayments" abstract="false" name="BusinessCombinationContingentConsiderationPotentialFuturePayments" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="zi_PaymentProvidedAsPercentOfNetCashSavings" abstract="false" name="PaymentProvidedAsPercentOfNetCashSavings" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="num:percentItemType"/>
  <xs:element id="zi_DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNetYearTwo" abstract="false" name="DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNetYearTwo" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="zi_IncentiveUnitsMember" abstract="true" name="IncentiveUnitsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="zi_TemporaryEquityExcessDueUponEarlyRedemption" abstract="false" name="TemporaryEquityExcessDueUponEarlyRedemption" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="zi_HSKBUnitsMember" abstract="true" name="HSKBUnitsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="zi_OtherComprehensiveIncomeLossNetOfTaxSubsequentToReorganization" abstract="false" name="OtherComprehensiveIncomeLossNetOfTaxSubsequentToReorganization" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="zi_TemporaryEquityRedeemedAndCancelledDuringPeriodValue" abstract="false" name="TemporaryEquityRedeemedAndCancelledDuringPeriodValue" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="zi_DebtInstrumentCovenantThresholdDrawsOnLineOfCreditToTriggerSpringingFinancialCovenant" abstract="false" name="DebtInstrumentCovenantThresholdDrawsOnLineOfCreditToTriggerSpringingFinancialCovenant" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="zi_BusinessCombinationContingentConsiderationArrangementsPercentageOfContingentPaymentsAttributableToPurchaseConsideration" abstract="false" name="BusinessCombinationContingentConsiderationArrangementsPercentageOfContingentPaymentsAttributableToPurchaseConsideration" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="num:percentItemType"/>
  <xs:element id="zi_NoncashInvestingAndFinancingActivitiesDeferredVariableConsiderationFromBusinessAcquisition" abstract="false" name="NoncashInvestingAndFinancingActivitiesDeferredVariableConsiderationFromBusinessAcquisition" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="zi_CashPaidForRepurchaseOfUnits" abstract="false" name="CashPaidForRepurchaseOfUnits" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
</xs:schema>
