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            <cik>0001776295</cik>
            <ccc>XXXXXXXX</ccc>
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        <liveTestFlag>LIVE</liveTestFlag>
  
  
  
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      <issuerInfo>
        <issuerCik>0000916076</issuerCik>
        <issuerName>MARTIN MARIETTA MATERIALS INC</issuerName>
        <secFileNumber>001-12744</secFileNumber>
        <issuerAddress>
          <com:street1>4123 PARKLAKE AVE</com:street1>
          <com:city>RALEIGH</com:city>
          <com:stateOrCountry>NC</com:stateOrCountry>
          <com:zipCode>27612</com:zipCode>
        </issuerAddress>
        <issuerContactPhone>919-781-4550</issuerContactPhone>
        <nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>LaTorre Craig M</nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>
        <relationshipsToIssuer>
          <relationshipToIssuer>Officer</relationshipToIssuer>
        </relationshipsToIssuer>
      </issuerInfo>
      <securitiesInformation>
        <securitiesClassTitle>Common Stock</securitiesClassTitle>
        <brokerOrMarketmakerDetails>
          <name>Fidelity Investments</name>
          <address>
            <com:street1>100 Summer Street</com:street1>
            <com:city>Boston</com:city>
            <com:stateOrCountry>MA</com:stateOrCountry>
            <com:zipCode>02210</com:zipCode>
          </address>
        </brokerOrMarketmakerDetails>
        <noOfUnitsSold>8078</noOfUnitsSold>
        <aggregateMarketValue>3701824.00</aggregateMarketValue>
        <noOfUnitsOutstanding>61968757</noOfUnitsOutstanding>
        <approxSaleDate>07/28/2023</approxSaleDate>
        <securitiesExchangeName>NYSE</securitiesExchangeName>
      </securitiesInformation>
      <securitiesToBeSold>
        <securitiesClassTitle>Common Stock</securitiesClassTitle>
        <acquiredDate>02/20/2020</acquiredDate>
        <natureOfAcquisitionTransaction>Vesting and distribution of Restricted Stock Units</natureOfAcquisitionTransaction>
        <nameOfPersonfromWhomAcquired>Martin Marietta Materials, Inc.</nameOfPersonfromWhomAcquired>
        <isGiftTransaction>N</isGiftTransaction>
        <amountOfSecuritiesAcquired>499</amountOfSecuritiesAcquired>
        <paymentDate>02/20/2020</paymentDate>
        <natureOfPayment>N/A</natureOfPayment>
      </securitiesToBeSold>
      <securitiesToBeSold>
        <securitiesClassTitle>Common Stock</securitiesClassTitle>
        <acquiredDate>02/19/2021</acquiredDate>
        <natureOfAcquisitionTransaction>Vesting and distribution of Restricted Stock Units</natureOfAcquisitionTransaction>
        <nameOfPersonfromWhomAcquired>Martin Marietta Materials, Inc.</nameOfPersonfromWhomAcquired>
        <isGiftTransaction>N</isGiftTransaction>
        <amountOfSecuritiesAcquired>249</amountOfSecuritiesAcquired>
        <paymentDate>02/19/2021</paymentDate>
        <natureOfPayment>N/A</natureOfPayment>
      </securitiesToBeSold>
      <securitiesToBeSold>
        <securitiesClassTitle>Common Stock</securitiesClassTitle>
        <acquiredDate>02/22/2021</acquiredDate>
        <natureOfAcquisitionTransaction>Vesting and distribution of Restricted Stock Units</natureOfAcquisitionTransaction>
        <nameOfPersonfromWhomAcquired>Martin Marietta Materials, Inc.</nameOfPersonfromWhomAcquired>
        <isGiftTransaction>N</isGiftTransaction>
        <amountOfSecuritiesAcquired>454</amountOfSecuritiesAcquired>
        <paymentDate>02/22/2021</paymentDate>
        <natureOfPayment>N/A</natureOfPayment>
      </securitiesToBeSold>
      <securitiesToBeSold>
        <securitiesClassTitle>Common Stock</securitiesClassTitle>
        <acquiredDate>08/23/2021</acquiredDate>
        <natureOfAcquisitionTransaction>Vesting and distribution of Restricted Stock Units</natureOfAcquisitionTransaction>
        <nameOfPersonfromWhomAcquired>Martin Marietta Materials, Inc.</nameOfPersonfromWhomAcquired>
        <isGiftTransaction>N</isGiftTransaction>
        <amountOfSecuritiesAcquired>1086</amountOfSecuritiesAcquired>
        <paymentDate>08/23/2021</paymentDate>
        <natureOfPayment>N/A</natureOfPayment>
      </securitiesToBeSold>
      <securitiesToBeSold>
        <securitiesClassTitle>Common Stock</securitiesClassTitle>
        <acquiredDate>02/14/2022</acquiredDate>
        <natureOfAcquisitionTransaction>Vesting and distribution of Performance Share Units</natureOfAcquisitionTransaction>
        <nameOfPersonfromWhomAcquired>Martin Marietta Materials, Inc.</nameOfPersonfromWhomAcquired>
        <isGiftTransaction>N</isGiftTransaction>
        <amountOfSecuritiesAcquired>1379</amountOfSecuritiesAcquired>
        <paymentDate>02/14/2022</paymentDate>
        <natureOfPayment>N/A</natureOfPayment>
      </securitiesToBeSold>
      <securitiesToBeSold>
        <securitiesClassTitle>Common Stock</securitiesClassTitle>
        <acquiredDate>02/17/2022</acquiredDate>
        <natureOfAcquisitionTransaction>Vesting and distribution of Restricted Stock Units</natureOfAcquisitionTransaction>
        <nameOfPersonfromWhomAcquired>Martin Marietta Materials, Inc.</nameOfPersonfromWhomAcquired>
        <isGiftTransaction>N</isGiftTransaction>
        <amountOfSecuritiesAcquired>211</amountOfSecuritiesAcquired>
        <paymentDate>02/17/2022</paymentDate>
        <natureOfPayment>N/A</natureOfPayment>
      </securitiesToBeSold>
      <securitiesToBeSold>
        <securitiesClassTitle>Common Stock</securitiesClassTitle>
        <acquiredDate>02/22/2022</acquiredDate>
        <natureOfAcquisitionTransaction>Vesting and distribution of Restricted Stock Units</natureOfAcquisitionTransaction>
        <nameOfPersonfromWhomAcquired>Martin Marietta Materials, Inc.</nameOfPersonfromWhomAcquired>
        <isGiftTransaction>N</isGiftTransaction>
        <amountOfSecuritiesAcquired>232</amountOfSecuritiesAcquired>
        <paymentDate>02/22/2022</paymentDate>
        <natureOfPayment>N/A</natureOfPayment>
      </securitiesToBeSold>
      <securitiesToBeSold>
        <securitiesClassTitle>Common Stock</securitiesClassTitle>
        <acquiredDate>02/22/2022</acquiredDate>
        <natureOfAcquisitionTransaction>Vesting and distribution of Restricted Stock Units</natureOfAcquisitionTransaction>
        <nameOfPersonfromWhomAcquired>Martin Marietta Materials, Inc.</nameOfPersonfromWhomAcquired>
        <isGiftTransaction>N</isGiftTransaction>
        <amountOfSecuritiesAcquired>405</amountOfSecuritiesAcquired>
        <paymentDate>02/22/2022</paymentDate>
        <natureOfPayment>N/A</natureOfPayment>
      </securitiesToBeSold>
      <securitiesToBeSold>
        <securitiesClassTitle>Common Stock</securitiesClassTitle>
        <acquiredDate>08/23/2022</acquiredDate>
        <natureOfAcquisitionTransaction>Vesting and distribution of Restricted Stock Units</natureOfAcquisitionTransaction>
        <nameOfPersonfromWhomAcquired>Martin Marietta Materials, Inc.</nameOfPersonfromWhomAcquired>
        <isGiftTransaction>N</isGiftTransaction>
        <amountOfSecuritiesAcquired>1091</amountOfSecuritiesAcquired>
        <paymentDate>08/23/2022</paymentDate>
        <natureOfPayment>N/A</natureOfPayment>
      </securitiesToBeSold>
      <securitiesToBeSold>
        <securitiesClassTitle>Common Stock</securitiesClassTitle>
        <acquiredDate>12/01/2022</acquiredDate>
        <natureOfAcquisitionTransaction>Distribution of stock units awarded pursuant to the terms of the Martin Marietta Incentive Stock Plan</natureOfAcquisitionTransaction>
        <nameOfPersonfromWhomAcquired>Martin Marietta Materials, Inc.</nameOfPersonfromWhomAcquired>
        <isGiftTransaction>N</isGiftTransaction>
        <amountOfSecuritiesAcquired>288</amountOfSecuritiesAcquired>
        <paymentDate>12/01/2022</paymentDate>
        <natureOfPayment>Cash</natureOfPayment>
      </securitiesToBeSold>
      <securitiesToBeSold>
        <securitiesClassTitle>Common Stock</securitiesClassTitle>
        <acquiredDate>02/17/2023</acquiredDate>
        <natureOfAcquisitionTransaction>Vesting and distribution of Restricted Stock Units</natureOfAcquisitionTransaction>
        <nameOfPersonfromWhomAcquired>Martin Marietta Materials, Inc.</nameOfPersonfromWhomAcquired>
        <isGiftTransaction>N</isGiftTransaction>
        <amountOfSecuritiesAcquired>200</amountOfSecuritiesAcquired>
        <paymentDate>02/17/2023</paymentDate>
        <natureOfPayment>N/A</natureOfPayment>
      </securitiesToBeSold>
      <securitiesToBeSold>
        <securitiesClassTitle>Common Stock</securitiesClassTitle>
        <acquiredDate>02/21/2023</acquiredDate>
        <natureOfAcquisitionTransaction>Vesting and distribution of Performance Share Units</natureOfAcquisitionTransaction>
        <nameOfPersonfromWhomAcquired>Martin Marietta Materials, Inc.</nameOfPersonfromWhomAcquired>
        <isGiftTransaction>N</isGiftTransaction>
        <amountOfSecuritiesAcquired>1543</amountOfSecuritiesAcquired>
        <paymentDate>02/21/2023</paymentDate>
        <natureOfPayment>N/A</natureOfPayment>
      </securitiesToBeSold>
      <securitiesToBeSold>
        <securitiesClassTitle>Common Stock</securitiesClassTitle>
        <acquiredDate>02/21/2023</acquiredDate>
        <natureOfAcquisitionTransaction>Vesting and distribution of Restricted Stock Units</natureOfAcquisitionTransaction>
        <nameOfPersonfromWhomAcquired>Martin Marietta Materials, Inc.</nameOfPersonfromWhomAcquired>
        <isGiftTransaction>N</isGiftTransaction>
        <amountOfSecuritiesAcquired>233</amountOfSecuritiesAcquired>
        <paymentDate>02/21/2023</paymentDate>
        <natureOfPayment>N/A</natureOfPayment>
      </securitiesToBeSold>
      <securitiesToBeSold>
        <securitiesClassTitle>Common Stock</securitiesClassTitle>
        <acquiredDate>02/21/2023</acquiredDate>
        <natureOfAcquisitionTransaction>Vesting and distribution of Restricted Stock Units</natureOfAcquisitionTransaction>
        <nameOfPersonfromWhomAcquired>Martin Marietta Materials, Inc.</nameOfPersonfromWhomAcquired>
        <isGiftTransaction>N</isGiftTransaction>
        <amountOfSecuritiesAcquired>208</amountOfSecuritiesAcquired>
        <paymentDate>02/21/2023</paymentDate>
        <natureOfPayment>N/A</natureOfPayment>
      </securitiesToBeSold>
      <nothingToReportFlagOnSecuritiesSoldInPast3Months>Y</nothingToReportFlagOnSecuritiesSoldInPast3Months>
      <noticeSignature>
        <noticeDate>07/27/2023</noticeDate>
        <signature>Roselyn R. Bar, Attorney-in-Fact</signature>
      </noticeSignature>
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metadata_documents: [{"type": "144", "sequence": "1", "filename": "primary_doc.xml", "secsgml_size_bytes": 10443}]
text: 144
  0001776295
  XXXXXXXX
  LIVE
  0000916076
  MARTIN MARIETTA MATERIALS INC
  001-12744
  4123 PARKLAKE AVE
  RALEIGH
  NC
  27612
  919-781-4550
  LaTorre Craig M
  Officer
  Common Stock
  Fidelity Investments
  100 Summer Street
  Boston
  MA
  02210
  8078
  3701824.00
  61968757
  07/28/2023
  NYSE
  Common Stock
  02/20/2020
  Vesting and distribution of Restricted Stock Units
  Martin Marietta Materials, Inc.
  N
  499
  02/20/2020
  N/A
  Common Stock
  02/19/2021
  Vesting and distribution of Restricted Stock Units
  Martin Marietta Materials, Inc.
  N
  249
  02/19/2021
  N/A
  Common Stock
  02/22/2021
  Vesting and distribution of Restricted Stock Units
  Martin Marietta Materials, Inc.
  N
  454
  02/22/2021
  N/A
  Common Stock
  08/23/2021
  Vesting and distribution of Restricted Stock Units
  Martin Marietta Materials, Inc.
  N
  1086
  08/23/2021
  N/A
  Common Stock
  02/14/2022
  Vesting and distribution of Performance Share Units
  Martin Marietta Materials, Inc.
  N
  1379
  02/14/2022
  N/A
  Common Stock
  02/17/2022
  Vesting and distribution of Restricted Stock Units
  Martin Marietta Materials, Inc.
  N
  211
  02/17/2022
  N/A
  Common Stock
  02/22/2022
  Vesting and distribution of Restricted Stock Units
  Martin Marietta Materials, Inc.
  N
  232
  02/22/2022
  N/A
  Common Stock
  02/22/2022
  Vesting and distribution of Restricted Stock Units
  Martin Marietta Materials, Inc.
  N
  405
  02/22/2022
  N/A
  Common Stock
  08/23/2022
  Vesting and distribution of Restricted Stock Units
  Martin Marietta Materials, Inc.
  N
  1091
  08/23/2022
  N/A
  Common Stock
  12/01/2022
  Distribution of stock units awarded pursuant to the terms of the Martin Marietta Incentive Stock Plan
  Martin Marietta Materials, Inc.
  N
  288
  12/01/2022
  Cash
  Common Stock
  02/17/2023
  Vesting and distribution of Restricted Stock Units
  Martin Marietta Materials, Inc.
  N
  200
  02/17/2023
  N/A
  Common Stock
  02/21/2023
  Vesting and distribution of Performance Share Units
  Martin Marietta Materials, Inc.
  N
  1543
  02/21/2023
  N/A
  Common Stock
  02/21/2023
  Vesting and distribution of Restricted Stock Units
  Martin Marietta Materials, Inc.
  N
  233
  02/21/2023
  N/A
  Common Stock
  02/21/2023
  Vesting and distribution of Restricted Stock Units
  Martin Marietta Materials, Inc.
  N
  208
  02/21/2023
  N/A
  Y
  07/27/2023
  Roselyn R. Bar, Attorney-in-Fact