<?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/A</submissionType>
    <previousAccessionNumber>0001971857-24-000705</previousAccessionNumber>
    <filerInfo>
      <filer>
        <filerCredentials>
          <cik>0001181114</cik>
          <ccc>XXXXXXXX</ccc>
        </filerCredentials>
      </filer>
      <liveTestFlag>LIVE</liveTestFlag>


    </filerInfo>
  </headerData>
  <formData>
    <issuerInfo>
      <issuerCik>0000073309</issuerCik>
      <issuerName>NUCOR CORP</issuerName>
      <secFileNumber>001-04119</secFileNumber>
      <issuerAddress>
        <com:street1>1915 REXFORD RD</com:street1>
        <com:city>CHARLOTTE</com:city>
        <com:stateOrCountry>NC</com:stateOrCountry>
        <com:zipCode>28211</com:zipCode>
      </issuerAddress>
      <issuerContactPhone>7043667000</issuerContactPhone>
      <nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>QUERY KENNETH REX</nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>
      <relationshipsToIssuer>
        <relationshipToIssuer>Officer</relationshipToIssuer>
      </relationshipsToIssuer>
    </issuerInfo>
    <securitiesInformation>
      <securitiesClassTitle>COMMON STOCK</securitiesClassTitle>
      <brokerOrMarketmakerDetails>
        <name>MERRILL LYNCH</name>
        <address>
          <com:street1>1301 GERVAIS ST </com:street1>
          <com:city>COLUMBIA</com:city>
          <com:stateOrCountry>SC</com:stateOrCountry>
          <com:zipCode>29201</com:zipCode>
        </address>
      </brokerOrMarketmakerDetails>
      <noOfUnitsSold>9000</noOfUnitsSold>
      <aggregateMarketValue>1321159.80</aggregateMarketValue>
      <noOfUnitsOutstanding>237338008</noOfUnitsOutstanding>
      <approxSaleDate>10/29/2024</approxSaleDate>
      <securitiesExchangeName>NYSE</securitiesExchangeName>
    </securitiesInformation>
    <securitiesToBeSold>
      <securitiesClassTitle>COMMON STOCK</securitiesClassTitle>
      <acquiredDate>03/10/2019</acquiredDate>
      <natureOfAcquisitionTransaction>PERFORMANCE SHARES</natureOfAcquisitionTransaction>
      <nameOfPersonfromWhomAcquired>NUCOR CORPORATION</nameOfPersonfromWhomAcquired>
      <isGiftTransaction>N</isGiftTransaction>
      <amountOfSecuritiesAcquired>2705</amountOfSecuritiesAcquired>
      <paymentDate>03/10/2019</paymentDate>
      <natureOfPayment>COMPENSATION</natureOfPayment>
    </securitiesToBeSold>
    <securitiesToBeSold>
      <securitiesClassTitle>COMMON STOCK</securitiesClassTitle>
      <acquiredDate>06/01/2023</acquiredDate>
      <natureOfAcquisitionTransaction>RESTRICTED STOCK VESTING</natureOfAcquisitionTransaction>
      <nameOfPersonfromWhomAcquired>NUCOR CORPORATION</nameOfPersonfromWhomAcquired>
      <isGiftTransaction>N</isGiftTransaction>
      <amountOfSecuritiesAcquired>239</amountOfSecuritiesAcquired>
      <paymentDate>06/01/2023</paymentDate>
      <natureOfPayment>COMPENSATION</natureOfPayment>
    </securitiesToBeSold>
    <securitiesToBeSold>
      <securitiesClassTitle>COMMON STOCK</securitiesClassTitle>
      <acquiredDate>03/10/2024</acquiredDate>
      <natureOfAcquisitionTransaction>PERFORMANCE SHARES</natureOfAcquisitionTransaction>
      <nameOfPersonfromWhomAcquired>NUCOR CORPORATION</nameOfPersonfromWhomAcquired>
      <isGiftTransaction>N</isGiftTransaction>
      <amountOfSecuritiesAcquired>6056</amountOfSecuritiesAcquired>
      <paymentDate>03/10/2024</paymentDate>
      <natureOfPayment>COMPENSATION</natureOfPayment>
    </securitiesToBeSold>
    <nothingToReportFlagOnSecuritiesSoldInPast3Months>Y</nothingToReportFlagOnSecuritiesSoldInPast3Months>
    <noticeSignature>
      <noticeDate>10/29/2024</noticeDate>
      <signature>KENNETH REX QUERY </signature>
    </noticeSignature>
  </formData>

</edgarSubmission>
