content: <?xml version="1.0" encoding="UTF-8"?><edgarSubmission xmlns="http://www.sec.gov/edgar/ownership" xmlns:com="http://www.sec.gov/edgar/common">
    <headerData>
      <submissionType>144</submissionType>
      <filerInfo>
        <filer>
          <filerCredentials>
            <cik>0001183693</cik>
            <ccc>XXXXXXXX</ccc>
          </filerCredentials>
        </filer>
        <liveTestFlag>LIVE</liveTestFlag>
  
  
  
      </filerInfo>
    </headerData>
    <formData>
      <issuerInfo>
        <issuerCik>0000749251</issuerCik>
        <issuerName>Gartner Inc.</issuerName>
        <secFileNumber>001-14443</secFileNumber>
        <issuerAddress>
          <com:street1>P.O. Box 10212</com:street1>
          <com:street2>56 Top Gallant Rd</com:street2>
          <com:city>Stamford</com:city>
          <com:stateOrCountry>CT</com:stateOrCountry>
          <com:zipCode>06902</com:zipCode>
        </issuerAddress>
        <issuerContactPhone>2039640096</issuerContactPhone>
        <nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>SMITH JAMES C</nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>
        <relationshipsToIssuer>
          <relationshipToIssuer>Director</relationshipToIssuer>
        </relationshipsToIssuer>
      </issuerInfo>
      <securitiesInformation>
        <securitiesClassTitle>Common Stock</securitiesClassTitle>
        <brokerOrMarketmakerDetails>
          <name>Hilltop Securities</name>
          <address>
            <com:street1>717 N Harwood St</com:street1>
            <com:street2>Suite 3400</com:street2>
            <com:city>Dallas</com:city>
            <com:stateOrCountry>TX</com:stateOrCountry>
            <com:zipCode>75201</com:zipCode>
          </address>
        </brokerOrMarketmakerDetails>
        <noOfUnitsSold>5000</noOfUnitsSold>
        <aggregateMarketValue>2300000.00</aggregateMarketValue>
        <noOfUnitsOutstanding>77970000</noOfUnitsOutstanding>
        <approxSaleDate>02/23/2024</approxSaleDate>
        <securitiesExchangeName>EDGX</securitiesExchangeName>
      </securitiesInformation>
      <securitiesToBeSold>
        <securitiesClassTitle>Common</securitiesClassTitle>
        <acquiredDate>10/03/2022</acquiredDate>
        <natureOfAcquisitionTransaction>Open Market Purchase</natureOfAcquisitionTransaction>
        <nameOfPersonfromWhomAcquired>Gartner Inc.</nameOfPersonfromWhomAcquired>
        <isGiftTransaction>N</isGiftTransaction>
        <amountOfSecuritiesAcquired>5000</amountOfSecuritiesAcquired>
        <paymentDate>10/03/2022</paymentDate>
        <natureOfPayment>Cash</natureOfPayment>
      </securitiesToBeSold>
      <nothingToReportFlagOnSecuritiesSoldInPast3Months>N</nothingToReportFlagOnSecuritiesSoldInPast3Months>
      <securitiesSoldInPast3Months>
        <sellerDetails>
          <name>James C Smith</name>
          <address>
            <com:street1>3510 Turtle Creek Blvd</com:street1>
            <com:street2>#8B</com:street2>
            <com:city>Dallas</com:city>
            <com:stateOrCountry>TX</com:stateOrCountry>
            <com:zipCode>75219</com:zipCode>
          </address>
        </sellerDetails>
        <securitiesClassTitle>Common</securitiesClassTitle>
        <saleDate>02/22/2024</saleDate>
        <amountOfSecuritiesSold>5000</amountOfSecuritiesSold>
        <grossProceeds>2275000.00</grossProceeds>
      </securitiesSoldInPast3Months>
      <securitiesSoldInPast3Months>
        <sellerDetails>
          <name>James C Smith</name>
          <address>
            <com:street1>3510 Turtle Creek Blvd</com:street1>
            <com:street2>#8B</com:street2>
            <com:city>Dallas</com:city>
            <com:stateOrCountry>TX</com:stateOrCountry>
            <com:zipCode>75219</com:zipCode>
          </address>
        </sellerDetails>
        <securitiesClassTitle>Common</securitiesClassTitle>
        <saleDate>02/09/2024</saleDate>
        <amountOfSecuritiesSold>10000</amountOfSecuritiesSold>
        <grossProceeds>4612434.23</grossProceeds>
      </securitiesSoldInPast3Months>
      <noticeSignature>
        <noticeDate>02/23/2024</noticeDate>
        <signature>Scott Coya</signature>
      </noticeSignature>
    </formData>
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text: 144
  0001183693
  XXXXXXXX
  LIVE
  0000749251
  Gartner Inc.
  001-14443
  P.O. Box 10212
  56 Top Gallant Rd
  Stamford
  CT
  06902
  2039640096
  SMITH JAMES C
  Director
  Common Stock
  Hilltop Securities
  717 N Harwood St
  Suite 3400
  Dallas
  TX
  75201
  5000
  2300000.00
  77970000
  02/23/2024
  EDGX
  Common
  10/03/2022
  Open Market Purchase
  Gartner Inc.
  N
  5000
  10/03/2022
  Cash
  N
  James C Smith
  3510 Turtle Creek Blvd
  #8B
  Dallas
  TX
  75219
  Common
  02/22/2024
  5000
  2275000.00
  James C Smith
  3510 Turtle Creek Blvd
  #8B
  Dallas
  TX
  75219
  Common
  02/09/2024
  10000
  4612434.23
  02/23/2024
  Scott Coya