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      <submissionType>144</submissionType>
      <filerInfo>
        <filer>
          <filerCredentials>
            <cik>0001721923</cik>
            <ccc>XXXXXXXX</ccc>
          </filerCredentials>
        </filer>
        <liveTestFlag>LIVE</liveTestFlag>
  
  
  
      </filerInfo>
    </headerData>
    <formData>
      <issuerInfo>
        <issuerCik>0000056047</issuerCik>
        <issuerName>KIRBY CORP</issuerName>
        <secFileNumber>001-07615</secFileNumber>
        <issuerAddress>
          <com:street1>55 WAUGH DRIVE SUITE 1000</com:street1>
          <com:city>HOUSTON</com:city>
          <com:stateOrCountry>TX</com:stateOrCountry>
          <com:zipCode>77007</com:zipCode>
        </issuerAddress>
        <issuerContactPhone>7134351000</issuerContactPhone>
        <nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>Woodruff William Matthew</nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>
        <relationshipsToIssuer>
          <relationshipToIssuer>Officer</relationshipToIssuer>
        </relationshipsToIssuer>
      </issuerInfo>
      <securitiesInformation>
        <securitiesClassTitle>COMMON</securitiesClassTitle>
        <brokerOrMarketmakerDetails>
          <name>MERRILL LYNCH</name>
          <address>
            <com:street1>3455 PEACHTREE RD NE</com:street1>
            <com:street2>STE 1000</com:street2>
            <com:city>ATLANTA</com:city>
            <com:stateOrCountry>GA</com:stateOrCountry>
            <com:zipCode>30326</com:zipCode>
          </address>
        </brokerOrMarketmakerDetails>
        <noOfUnitsSold>3750</noOfUnitsSold>
        <aggregateMarketValue>409687.50</aggregateMarketValue>
        <noOfUnitsOutstanding>58522000</noOfUnitsOutstanding>
        <approxSaleDate>05/01/2024</approxSaleDate>
        <securitiesExchangeName>NYSE</securitiesExchangeName>
      </securitiesInformation>
      <securitiesToBeSold>
        <securitiesClassTitle>COMMON</securitiesClassTitle>
        <acquiredDate>01/24/2018</acquiredDate>
        <natureOfAcquisitionTransaction>VESTING OF STOCK AWARDS</natureOfAcquisitionTransaction>
        <nameOfPersonfromWhomAcquired>KIRBY CORP</nameOfPersonfromWhomAcquired>
        <isGiftTransaction>N</isGiftTransaction>
        <amountOfSecuritiesAcquired>454</amountOfSecuritiesAcquired>
        <paymentDate>01/24/2018</paymentDate>
        <natureOfPayment>COMPENSATORY PAYMENT</natureOfPayment>
      </securitiesToBeSold>
      <securitiesToBeSold>
        <securitiesClassTitle>COMMON</securitiesClassTitle>
        <acquiredDate>11/06/2018</acquiredDate>
        <natureOfAcquisitionTransaction>VESTING OF A STOCK AWARD</natureOfAcquisitionTransaction>
        <nameOfPersonfromWhomAcquired>KIRBY CORP</nameOfPersonfromWhomAcquired>
        <isGiftTransaction>N</isGiftTransaction>
        <amountOfSecuritiesAcquired>7</amountOfSecuritiesAcquired>
        <paymentDate>11/06/2018</paymentDate>
        <natureOfPayment>COMPENSATORY PAYMENT</natureOfPayment>
      </securitiesToBeSold>
      <securitiesToBeSold>
        <securitiesClassTitle>COMMON</securitiesClassTitle>
        <acquiredDate>01/24/2019</acquiredDate>
        <natureOfAcquisitionTransaction>VESTING OF STOCK AWARDS</natureOfAcquisitionTransaction>
        <nameOfPersonfromWhomAcquired>KIRNY CORP</nameOfPersonfromWhomAcquired>
        <isGiftTransaction>N</isGiftTransaction>
        <amountOfSecuritiesAcquired>502</amountOfSecuritiesAcquired>
        <paymentDate>01/24/2019</paymentDate>
        <natureOfPayment>COMPENSATORY PAYMENT</natureOfPayment>
      </securitiesToBeSold>
      <securitiesToBeSold>
        <securitiesClassTitle>COMMON</securitiesClassTitle>
        <acquiredDate>11/06/2019</acquiredDate>
        <natureOfAcquisitionTransaction>VESTING OF A STOCK AWARD</natureOfAcquisitionTransaction>
        <nameOfPersonfromWhomAcquired>KIRBY CORP</nameOfPersonfromWhomAcquired>
        <isGiftTransaction>N</isGiftTransaction>
        <amountOfSecuritiesAcquired>7</amountOfSecuritiesAcquired>
        <paymentDate>11/06/2019</paymentDate>
        <natureOfPayment>COMPENSATORY PAYMENT</natureOfPayment>
      </securitiesToBeSold>
      <securitiesToBeSold>
        <securitiesClassTitle>COMMON</securitiesClassTitle>
        <acquiredDate>01/24/2020</acquiredDate>
        <natureOfAcquisitionTransaction>VESTING OF STOCK AWARDS</natureOfAcquisitionTransaction>
        <nameOfPersonfromWhomAcquired>KIRBY CORP</nameOfPersonfromWhomAcquired>
        <isGiftTransaction>N</isGiftTransaction>
        <amountOfSecuritiesAcquired>591</amountOfSecuritiesAcquired>
        <paymentDate>01/24/2020</paymentDate>
        <natureOfPayment>COMPENSATORY PAYMENT</natureOfPayment>
      </securitiesToBeSold>
      <securitiesToBeSold>
        <securitiesClassTitle>COMMON</securitiesClassTitle>
        <acquiredDate>11/06/2020</acquiredDate>
        <natureOfAcquisitionTransaction>VESTING OF A STOCK AWARD</natureOfAcquisitionTransaction>
        <nameOfPersonfromWhomAcquired>KIRBY CORP</nameOfPersonfromWhomAcquired>
        <isGiftTransaction>N</isGiftTransaction>
        <amountOfSecuritiesAcquired>7</amountOfSecuritiesAcquired>
        <paymentDate>11/06/2020</paymentDate>
        <natureOfPayment>COMPENSATORY PAYMENT</natureOfPayment>
      </securitiesToBeSold>
      <securitiesToBeSold>
        <securitiesClassTitle>COMMON</securitiesClassTitle>
        <acquiredDate>01/24/2021</acquiredDate>
        <natureOfAcquisitionTransaction>VESTING OF STOCK AWARDS</natureOfAcquisitionTransaction>
        <nameOfPersonfromWhomAcquired>KIRBY CORP</nameOfPersonfromWhomAcquired>
        <isGiftTransaction>N</isGiftTransaction>
        <amountOfSecuritiesAcquired>661</amountOfSecuritiesAcquired>
        <paymentDate>01/24/2021</paymentDate>
        <natureOfPayment>COMPENSATORY PAYMENT</natureOfPayment>
      </securitiesToBeSold>
      <securitiesToBeSold>
        <securitiesClassTitle>COMMON</securitiesClassTitle>
        <acquiredDate>11/06/2021</acquiredDate>
        <natureOfAcquisitionTransaction>VESTING OF A STOCK AWARD</natureOfAcquisitionTransaction>
        <nameOfPersonfromWhomAcquired>KIRBY CORP</nameOfPersonfromWhomAcquired>
        <isGiftTransaction>N</isGiftTransaction>
        <amountOfSecuritiesAcquired>7</amountOfSecuritiesAcquired>
        <paymentDate>11/06/2021</paymentDate>
        <natureOfPayment>COMPENSATORY PAYMENT</natureOfPayment>
      </securitiesToBeSold>
      <securitiesToBeSold>
        <securitiesClassTitle>COMMON</securitiesClassTitle>
        <acquiredDate>01/24/2022</acquiredDate>
        <natureOfAcquisitionTransaction>VESTING OF STOCK AWARDS</natureOfAcquisitionTransaction>
        <nameOfPersonfromWhomAcquired>KIRBY CORP</nameOfPersonfromWhomAcquired>
        <isGiftTransaction>N</isGiftTransaction>
        <amountOfSecuritiesAcquired>746</amountOfSecuritiesAcquired>
        <paymentDate>01/24/2022</paymentDate>
        <natureOfPayment>COMPENSATORY PAYMENT</natureOfPayment>
      </securitiesToBeSold>
      <securitiesToBeSold>
        <securitiesClassTitle>COMMON</securitiesClassTitle>
        <acquiredDate>11/06/2022</acquiredDate>
        <natureOfAcquisitionTransaction>VESTING OF A STOCK AWARD</natureOfAcquisitionTransaction>
        <nameOfPersonfromWhomAcquired>KIRBY CORP</nameOfPersonfromWhomAcquired>
        <isGiftTransaction>N</isGiftTransaction>
        <amountOfSecuritiesAcquired>7</amountOfSecuritiesAcquired>
        <paymentDate>11/06/2022</paymentDate>
        <natureOfPayment>COMPENSATORY PAYMENT</natureOfPayment>
      </securitiesToBeSold>
      <securitiesToBeSold>
        <securitiesClassTitle>COMMON</securitiesClassTitle>
        <acquiredDate>01/24/2023</acquiredDate>
        <natureOfAcquisitionTransaction>VESTING OF STOCK AWARDS</natureOfAcquisitionTransaction>
        <nameOfPersonfromWhomAcquired>KIRBY CORP</nameOfPersonfromWhomAcquired>
        <isGiftTransaction>N</isGiftTransaction>
        <amountOfSecuritiesAcquired>652</amountOfSecuritiesAcquired>
        <paymentDate>01/24/2023</paymentDate>
        <natureOfPayment>COMPENSATORY PAYMENT</natureOfPayment>
      </securitiesToBeSold>
      <securitiesToBeSold>
        <securitiesClassTitle>COMMON</securitiesClassTitle>
        <acquiredDate>02/03/2023</acquiredDate>
        <natureOfAcquisitionTransaction>VESTING OF A STOCK AWARD</natureOfAcquisitionTransaction>
        <nameOfPersonfromWhomAcquired>KIRBY CORP</nameOfPersonfromWhomAcquired>
        <isGiftTransaction>N</isGiftTransaction>
        <amountOfSecuritiesAcquired>109</amountOfSecuritiesAcquired>
        <paymentDate>02/03/2023</paymentDate>
        <natureOfPayment>COMPENSATORY PAYMENT</natureOfPayment>
      </securitiesToBeSold>
      <nothingToReportFlagOnSecuritiesSoldInPast3Months>Y</nothingToReportFlagOnSecuritiesSoldInPast3Months>
      <noticeSignature>
        <noticeDate>05/01/2024</noticeDate>
        <signature>WILLIAM MATTHEW WOODRUFF</signature>
      </noticeSignature>
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metadata_documents: [{"type": "144", "sequence": "1", "filename": "primary_doc.xml", "secsgml_size_bytes": 8791}]
text: 144
  0001721923
  XXXXXXXX
  LIVE
  0000056047
  KIRBY CORP
  001-07615
  55 WAUGH DRIVE SUITE 1000
  HOUSTON
  TX
  77007
  7134351000
  Woodruff William Matthew
  Officer
  COMMON
  MERRILL LYNCH
  3455 PEACHTREE RD NE
  STE 1000
  ATLANTA
  GA
  30326
  3750
  409687.50
  58522000
  05/01/2024
  NYSE
  COMMON
  01/24/2018
  VESTING OF STOCK AWARDS
  KIRBY CORP
  N
  454
  01/24/2018
  COMPENSATORY PAYMENT
  COMMON
  11/06/2018
  VESTING OF A STOCK AWARD
  KIRBY CORP
  N
  7
  11/06/2018
  COMPENSATORY PAYMENT
  COMMON
  01/24/2019
  VESTING OF STOCK AWARDS
  KIRNY CORP
  N
  502
  01/24/2019
  COMPENSATORY PAYMENT
  COMMON
  11/06/2019
  VESTING OF A STOCK AWARD
  KIRBY CORP
  N
  7
  11/06/2019
  COMPENSATORY PAYMENT
  COMMON
  01/24/2020
  VESTING OF STOCK AWARDS
  KIRBY CORP
  N
  591
  01/24/2020
  COMPENSATORY PAYMENT
  COMMON
  11/06/2020
  VESTING OF A STOCK AWARD
  KIRBY CORP
  N
  7
  11/06/2020
  COMPENSATORY PAYMENT
  COMMON
  01/24/2021
  VESTING OF STOCK AWARDS
  KIRBY CORP
  N
  661
  01/24/2021
  COMPENSATORY PAYMENT
  COMMON
  11/06/2021
  VESTING OF A STOCK AWARD
  KIRBY CORP
  N
  7
  11/06/2021
  COMPENSATORY PAYMENT
  COMMON
  01/24/2022
  VESTING OF STOCK AWARDS
  KIRBY CORP
  N
  746
  01/24/2022
  COMPENSATORY PAYMENT
  COMMON
  11/06/2022
  VESTING OF A STOCK AWARD
  KIRBY CORP
  N
  7
  11/06/2022
  COMPENSATORY PAYMENT
  COMMON
  01/24/2023
  VESTING OF STOCK AWARDS
  KIRBY CORP
  N
  652
  01/24/2023
  COMPENSATORY PAYMENT
  COMMON
  02/03/2023
  VESTING OF A STOCK AWARD
  KIRBY CORP
  N
  109
  02/03/2023
  COMPENSATORY PAYMENT
  Y
  05/01/2024
  WILLIAM MATTHEW WOODRUFF