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    <submissionType>144</submissionType>
    <filerInfo>
      <filer>
        <filerCredentials>
          <cik>0001932649</cik>
          <ccc>XXXXXXXX</ccc>
        </filerCredentials>
      </filer>
      <liveTestFlag>LIVE</liveTestFlag>


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  <formData>
    <issuerInfo>
      <issuerCik>0000853816</issuerCik>
      <issuerName>LANDSTAR SYSTEM INC</issuerName>
      <secFileNumber>000-21238</secFileNumber>
      <issuerAddress>
        <com:street1>13410 SUTTON PARK DRIVE SOUTH</com:street1>
        <com:city>JACKSONVILLE</com:city>
        <com:stateOrCountry>FL</com:stateOrCountry>
        <com:zipCode>32224</com:zipCode>
      </issuerAddress>
      <issuerContactPhone>9043989400</issuerContactPhone>
      <nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>Todd James P</nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>
      <relationshipsToIssuer>
        <relationshipToIssuer>Officer</relationshipToIssuer>
      </relationshipsToIssuer>
    </issuerInfo>
    <securitiesInformation>
      <securitiesClassTitle>Common</securitiesClassTitle>
      <brokerOrMarketmakerDetails>
        <name>Merrill Edge</name>
        <address>
          <com:street1>P.O. Box 40486</com:street1>
          <com:city>Jacksonville</com:city>
          <com:stateOrCountry>FL</com:stateOrCountry>
          <com:zipCode>32203</com:zipCode>
        </address>
      </brokerOrMarketmakerDetails>
      <noOfUnitsSold>1000</noOfUnitsSold>
      <aggregateMarketValue>177000.00</aggregateMarketValue>
      <noOfUnitsOutstanding>35331173</noOfUnitsOutstanding>
      <approxSaleDate>11/01/2024</approxSaleDate>
      <securitiesExchangeName>nasdaq</securitiesExchangeName>
    </securitiesInformation>
    <securitiesToBeSold>
      <securitiesClassTitle>Common</securitiesClassTitle>
      <acquiredDate>01/31/2024</acquiredDate>
      <natureOfAcquisitionTransaction>Stock vesting</natureOfAcquisitionTransaction>
      <nameOfPersonfromWhomAcquired>James P. Todd</nameOfPersonfromWhomAcquired>
      <isGiftTransaction>N</isGiftTransaction>
      <amountOfSecuritiesAcquired>969</amountOfSecuritiesAcquired>
      <paymentDate>01/31/2024</paymentDate>
      <natureOfPayment>Stock vesting</natureOfPayment>
    </securitiesToBeSold>
    <securitiesToBeSold>
      <securitiesClassTitle>Common</securitiesClassTitle>
      <acquiredDate>01/31/2023</acquiredDate>
      <natureOfAcquisitionTransaction>Stock vesting</natureOfAcquisitionTransaction>
      <nameOfPersonfromWhomAcquired>James P. Todd</nameOfPersonfromWhomAcquired>
      <isGiftTransaction>N</isGiftTransaction>
      <amountOfSecuritiesAcquired>31</amountOfSecuritiesAcquired>
      <paymentDate>01/31/2023</paymentDate>
      <natureOfPayment>Stock vesting</natureOfPayment>
    </securitiesToBeSold>
    <nothingToReportFlagOnSecuritiesSoldInPast3Months>Y</nothingToReportFlagOnSecuritiesSoldInPast3Months>
    <noticeSignature>
      <noticeDate>11/01/2024</noticeDate>
      <signature>James P. Todd</signature>
    </noticeSignature>
  </formData>
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144
0001932649
XXXXXXXX
LIVE
0000853816
LANDSTAR SYSTEM INC
000-21238
13410 SUTTON PARK DRIVE SOUTH
JACKSONVILLE
FL
32224
9043989400
Todd James P
Officer
Common
Merrill Edge
P.O. Box 40486
Jacksonville
FL
32203
1000
177000.00
35331173
11/01/2024
nasdaq
Common
01/31/2024
Stock vesting
James P. Todd
N
969
01/31/2024
Stock vesting
Common
01/31/2023
Stock vesting
James P. Todd
N
31
01/31/2023
Stock vesting
Y
11/01/2024
James P. Todd