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      <submissionType>144</submissionType>
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        <filer>
          <filerCredentials>
            <cik>0001183693</cik>
            <ccc>XXXXXXXX</ccc>
          </filerCredentials>
        </filer>
        <liveTestFlag>LIVE</liveTestFlag>
  
  
  
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    </headerData>
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      <issuerInfo>
        <issuerCik>0000749251</issuerCik>
        <issuerName>GARTNER INC</issuerName>
        <secFileNumber>001-14443</secFileNumber>
        <issuerAddress>
          <com:street1>56 TOP GALLANT RD</com:street1>
          <com:street2>P O BOX 10212</com:street2>
          <com:city>STAMFORD</com:city>
          <com:stateOrCountry>CT</com:stateOrCountry>
          <com:zipCode>06904-2212</com:zipCode>
        </issuerAddress>
        <issuerContactPhone>2039640096</issuerContactPhone>
        <nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>SMITH JAMES C</nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>
        <relationshipsToIssuer>
          <relationshipToIssuer>Director</relationshipToIssuer>
        </relationshipsToIssuer>
      </issuerInfo>
      <securitiesInformation>
        <securitiesClassTitle>Gartner, Inc.</securitiesClassTitle>
        <brokerOrMarketmakerDetails>
          <name>Hilltop Securities, Inc.</name>
          <address>
            <com:street1>717 N. Harwood St, Suite 2400</com:street1>
            <com:city>Dallas</com:city>
            <com:stateOrCountry>TX</com:stateOrCountry>
            <com:zipCode>75201</com:zipCode>
          </address>
        </brokerOrMarketmakerDetails>
        <noOfUnitsSold>10083</noOfUnitsSold>
        <aggregateMarketValue>3932370.00</aggregateMarketValue>
        <noOfUnitsOutstanding>400574</noOfUnitsOutstanding>
        <approxSaleDate>11/06/2023</approxSaleDate>
        <securitiesExchangeName>NYSE</securitiesExchangeName>
      </securitiesInformation>
      <securitiesToBeSold>
        <securitiesClassTitle>Common</securitiesClassTitle>
        <acquiredDate>10/03/2022</acquiredDate>
        <natureOfAcquisitionTransaction>Purchased in the open market</natureOfAcquisitionTransaction>
        <nameOfPersonfromWhomAcquired>Open Market Transaction</nameOfPersonfromWhomAcquired>
        <isGiftTransaction>N</isGiftTransaction>
        <amountOfSecuritiesAcquired>10083</amountOfSecuritiesAcquired>
        <paymentDate>11/08/2023</paymentDate>
        <natureOfPayment>Cash</natureOfPayment>
      </securitiesToBeSold>
      <nothingToReportFlagOnSecuritiesSoldInPast3Months>Y</nothingToReportFlagOnSecuritiesSoldInPast3Months>
      <noticeSignature>
        <noticeDate>11/06/2023</noticeDate>
        <signature>Scott Coya</signature>
      </noticeSignature>
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text: 144
  0001183693
  XXXXXXXX
  LIVE
  0000749251
  GARTNER INC
  001-14443
  56 TOP GALLANT RD
  P O BOX 10212
  STAMFORD
  CT
  06904-2212
  2039640096
  SMITH JAMES C
  Director
  Gartner, Inc.
  Hilltop Securities, Inc.
  717 N. Harwood St, Suite 2400
  Dallas
  TX
  75201
  10083
  3932370.00
  400574
  11/06/2023
  NYSE
  Common
  10/03/2022
  Purchased in the open market
  Open Market Transaction
  N
  10083
  11/08/2023
  Cash
  Y
  11/06/2023
  Scott Coya