content: <?xml version="1.0" encoding="UTF-8"?><edgarSubmission xmlns="http://www.sec.gov/edgar/ownership" xmlns:com="http://www.sec.gov/edgar/common">
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      <submissionType>144</submissionType>
      <filerInfo>
        <filer>
          <filerCredentials>
            <cik>0000891055</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>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>HILLTOP SECURITIES INC.</nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>
        <relationshipsToIssuer>
          <relationshipToIssuer>Director</relationshipToIssuer>
        </relationshipsToIssuer>
      </issuerInfo>
      <securitiesInformation>
        <securitiesClassTitle>Common</securitiesClassTitle>
        <brokerOrMarketmakerDetails>
          <name>Hilltop Securities</name>
          <address>
            <com:street1>717 N Harwood St</com:street1>
            <com:city>Dallas</com:city>
            <com:stateOrCountry>TX</com:stateOrCountry>
            <com:zipCode>75201</com:zipCode>
          </address>
        </brokerOrMarketmakerDetails>
        <noOfUnitsSold>2450</noOfUnitsSold>
        <aggregateMarketValue>1358951.79</aggregateMarketValue>
        <noOfUnitsOutstanding>776300002</noOfUnitsOutstanding>
        <approxSaleDate>11/11/2024</approxSaleDate>
        <securitiesExchangeName>NITE</securitiesExchangeName>
      </securitiesInformation>
      <securitiesInformation>
        <securitiesClassTitle>Common</securitiesClassTitle>
        <brokerOrMarketmakerDetails>
          <name>Hilltop Securities</name>
          <address>
            <com:street1>717 N Harwood St</com:street1>
            <com:city>Dallas</com:city>
            <com:stateOrCountry>TX</com:stateOrCountry>
            <com:zipCode>75201</com:zipCode>
          </address>
        </brokerOrMarketmakerDetails>
        <noOfUnitsSold>2752</noOfUnitsSold>
        <aggregateMarketValue>1419239.88</aggregateMarketValue>
        <noOfUnitsOutstanding>77630000</noOfUnitsOutstanding>
        <approxSaleDate>11/12/2024</approxSaleDate>
        <securitiesExchangeName>NITE</securitiesExchangeName>
      </securitiesInformation>
      <securitiesToBeSold>
        <securitiesClassTitle>Common</securitiesClassTitle>
        <acquiredDate>10/03/2022</acquiredDate>
        <natureOfAcquisitionTransaction>Vesting Stock</natureOfAcquisitionTransaction>
        <nameOfPersonfromWhomAcquired>James Smith</nameOfPersonfromWhomAcquired>
        <isGiftTransaction>N</isGiftTransaction>
        <amountOfSecuritiesAcquired>5202</amountOfSecuritiesAcquired>
        <paymentDate>10/03/2022</paymentDate>
        <natureOfPayment>Stock Compensation</natureOfPayment>
      </securitiesToBeSold>
      <nothingToReportFlagOnSecuritiesSoldInPast3Months>N</nothingToReportFlagOnSecuritiesSoldInPast3Months>
      <securitiesSoldInPast3Months>
        <sellerDetails>
          <name>James Smith</name>
          <address>
            <com:street1>3510 Turtle Creek Blvd</com:street1>
            <com:city>Dallas</com:city>
            <com:stateOrCountry>TX</com:stateOrCountry>
            <com:zipCode>75219</com:zipCode>
          </address>
        </sellerDetails>
        <securitiesClassTitle>Common</securitiesClassTitle>
        <saleDate>09/10/2024</saleDate>
        <amountOfSecuritiesSold>2128</amountOfSecuritiesSold>
        <grossProceeds>1064317.70</grossProceeds>
      </securitiesSoldInPast3Months>
      <securitiesSoldInPast3Months>
        <sellerDetails>
          <name>James Smith</name>
          <address>
            <com:street1>3510 Turtle Creek Blvd</com:street1>
            <com:city>Dallas</com:city>
            <com:stateOrCountry>TX</com:stateOrCountry>
            <com:zipCode>75219</com:zipCode>
          </address>
        </sellerDetails>
        <securitiesClassTitle>Common</securitiesClassTitle>
        <saleDate>11/06/2024</saleDate>
        <amountOfSecuritiesSold>10000</amountOfSecuritiesSold>
        <grossProceeds>5357555.00</grossProceeds>
      </securitiesSoldInPast3Months>
      <securitiesSoldInPast3Months>
        <sellerDetails>
          <name>James Smith</name>
          <address>
            <com:street1>3510 Turtle Creek Blvd</com:street1>
            <com:city>Dallas</com:city>
            <com:stateOrCountry>TX</com:stateOrCountry>
            <com:zipCode>75219</com:zipCode>
          </address>
        </sellerDetails>
        <securitiesClassTitle>Common</securitiesClassTitle>
        <saleDate>11/07/2024</saleDate>
        <amountOfSecuritiesSold>4447</amountOfSecuritiesSold>
        <grossProceeds>2403422.06</grossProceeds>
      </securitiesSoldInPast3Months>
      <securitiesSoldInPast3Months>
        <sellerDetails>
          <name>James Smith</name>
          <address>
            <com:street1>3510 Turtle Creek Blvd</com:street1>
            <com:city>Dallas</com:city>
            <com:stateOrCountry>TX</com:stateOrCountry>
            <com:zipCode>75219</com:zipCode>
          </address>
        </sellerDetails>
        <securitiesClassTitle>Common</securitiesClassTitle>
        <saleDate>11/08/2024</saleDate>
        <amountOfSecuritiesSold>17533</amountOfSecuritiesSold>
        <grossProceeds>9592108.02</grossProceeds>
      </securitiesSoldInPast3Months>
      <noticeSignature>
        <noticeDate>11/12/2024</noticeDate>
        <signature>Scott Coya</signature>
      </noticeSignature>
    </formData>
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metadata_documents: [{"type": "144", "sequence": "1", "filename": "primary_doc.xml", "secsgml_size_bytes": 5806}]
text: 144
  0000891055
  XXXXXXXX
  LIVE
  0000749251
  GARTNER INC
  001-14443
  56 TOP GALLANT RD
  P O BOX 10212
  STAMFORD
  CT
  06904-2212
  2039640096
  HILLTOP SECURITIES INC.
  Director
  Common
  Hilltop Securities
  717 N Harwood St
  Dallas
  TX
  75201
  2450
  1358951.79
  776300002
  11/11/2024
  NITE
  Common
  Hilltop Securities
  717 N Harwood St
  Dallas
  TX
  75201
  2752
  1419239.88
  77630000
  11/12/2024
  NITE
  Common
  10/03/2022
  Vesting Stock
  James Smith
  N
  5202
  10/03/2022
  Stock Compensation
  N
  James Smith
  3510 Turtle Creek Blvd
  Dallas
  TX
  75219
  Common
  09/10/2024
  2128
  1064317.70
  James Smith
  3510 Turtle Creek Blvd
  Dallas
  TX
  75219
  Common
  11/06/2024
  10000
  5357555.00
  James Smith
  3510 Turtle Creek Blvd
  Dallas
  TX
  75219
  Common
  11/07/2024
  4447
  2403422.06
  James Smith
  3510 Turtle Creek Blvd
  Dallas
  TX
  75219
  Common
  11/08/2024
  17533
  9592108.02
  11/12/2024
  Scott Coya