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>0001045849</cik>
            <ccc>XXXXXXXX</ccc>
          </filerCredentials>
        </filer>
        <liveTestFlag>LIVE</liveTestFlag>
  
  
      </filerInfo>
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    <formData>
      <issuerInfo>
        <issuerCik>0001819994</issuerCik>
        <issuerName>Rocket Lab USA, Inc.</issuerName>
        <secFileNumber>001-39560</secFileNumber>
        <issuerAddress>
          <com:street1>3881 MCGOWEN STREET</com:street1>
          <com:city>LONG BEACH</com:city>
          <com:stateOrCountry>CA</com:stateOrCountry>
          <com:zipCode>90808</com:zipCode>
        </issuerAddress>
        <issuerContactPhone>714-465-5737</issuerContactPhone>
        <nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>GRIFFIN MICHAEL D</nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>
        <relationshipsToIssuer>
          <relationshipToIssuer>Director</relationshipToIssuer>
        </relationshipsToIssuer>
      </issuerInfo>
      <securitiesInformation>
        <securitiesClassTitle>Common</securitiesClassTitle>
        <brokerOrMarketmakerDetails>
          <name>Fidelity Brokerage Services LLC</name>
          <address>
            <com:street1>245 Summer Street</com:street1>
            <com:city>Boston</com:city>
            <com:stateOrCountry>MA</com:stateOrCountry>
            <com:zipCode>02110</com:zipCode>
          </address>
        </brokerOrMarketmakerDetails>
        <noOfUnitsSold>39446</noOfUnitsSold>
        <aggregateMarketValue>275924.00</aggregateMarketValue>
        <noOfUnitsOutstanding>496640145</noOfUnitsOutstanding>
        <approxSaleDate>08/22/2024</approxSaleDate>
        <securitiesExchangeName>NYSE</securitiesExchangeName>
      </securitiesInformation>
      <securitiesToBeSold>
        <securitiesClassTitle>Common</securitiesClassTitle>
        <acquiredDate>06/12/2024</acquiredDate>
        <natureOfAcquisitionTransaction>Stock Award</natureOfAcquisitionTransaction>
        <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
        <isGiftTransaction>N</isGiftTransaction>
        <amountOfSecuritiesAcquired>39446</amountOfSecuritiesAcquired>
        <paymentDate>06/12/2024</paymentDate>
        <natureOfPayment>Compensation</natureOfPayment>
      </securitiesToBeSold>
      <nothingToReportFlagOnSecuritiesSoldInPast3Months>Y</nothingToReportFlagOnSecuritiesSoldInPast3Months>
      <remarks>Shares sold in the account registered to Logiq Inc of which Michael Griffin is an account stakeholder</remarks>
      <noticeSignature>
        <noticeDate>08/22/2024</noticeDate>
        <signature>/s/ Christian Nasser as a duly authorized representative of Fidelity Brokerage Services LLC, as attorney-in-fact for  Michael Griffin</signature>
      </noticeSignature>
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text: 144
  0001045849
  XXXXXXXX
  LIVE
  0001819994
  Rocket Lab USA, Inc.
  001-39560
  3881 MCGOWEN STREET
  LONG BEACH
  CA
  90808
  714-465-5737
  GRIFFIN MICHAEL D
  Director
  Common
  Fidelity Brokerage Services LLC
  245 Summer Street
  Boston
  MA
  02110
  39446
  275924.00
  496640145
  08/22/2024
  NYSE
  Common
  06/12/2024
  Stock Award
  Issuer
  N
  39446
  06/12/2024
  Compensation
  Y
  Shares sold in the account registered to Logiq Inc of which Michael Griffin is an account stakeholder
  08/22/2024
  /s/ Christian Nasser as a duly authorized representative of Fidelity Brokerage Services LLC, as attorney-in-fact for  Michael Griffin