<?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</submissionType>
    <filerInfo>
      <filer>
        <filerCredentials>
          <cik>0001551870</cik>
          <ccc>XXXXXXXX</ccc>
        </filerCredentials>
      </filer>
      <liveTestFlag>LIVE</liveTestFlag>


    </filerInfo>
  </headerData>
  <formData>
    <issuerInfo>
      <issuerCik>0000811596</issuerCik>
      <issuerName>KAISER ALUMINUM CORP</issuerName>
      <secFileNumber>001-09447</secFileNumber>
      <issuerAddress>
        <com:street1>27422 PORTOLA PARKWAY, SUITE 200</com:street1>
        <com:city>FOOTHILL RANCH</com:city>
        <com:stateOrCountry>CA</com:stateOrCountry>
        <com:zipCode>92610-2831</com:zipCode>
      </issuerAddress>
      <issuerContactPhone>949-614-1740</issuerContactPhone>
      <nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>Parkinson Ray</nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>
      <relationshipsToIssuer>
        <relationshipToIssuer>Officer</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>4727</noOfUnitsSold>
      <aggregateMarketValue>377498.00</aggregateMarketValue>
      <noOfUnitsOutstanding>16013164</noOfUnitsOutstanding>
      <approxSaleDate>08/02/2023</approxSaleDate>
      <securitiesExchangeName>Nasdaq</securitiesExchangeName>
    </securitiesInformation>
    <securitiesToBeSold>
      <securitiesClassTitle>Common</securitiesClassTitle>
      <acquiredDate>03/05/2021</acquiredDate>
      <natureOfAcquisitionTransaction>Stock Award</natureOfAcquisitionTransaction>
      <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
      <isGiftTransaction>N</isGiftTransaction>
      <amountOfSecuritiesAcquired>1427</amountOfSecuritiesAcquired>
      <paymentDate>03/05/2021</paymentDate>
      <natureOfPayment>Compensation</natureOfPayment>
    </securitiesToBeSold>
    <securitiesToBeSold>
      <securitiesClassTitle>Common</securitiesClassTitle>
      <acquiredDate>03/05/2020</acquiredDate>
      <natureOfAcquisitionTransaction>Stock Award</natureOfAcquisitionTransaction>
      <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
      <isGiftTransaction>N</isGiftTransaction>
      <amountOfSecuritiesAcquired>1000</amountOfSecuritiesAcquired>
      <paymentDate>03/05/2020</paymentDate>
      <natureOfPayment>Compensation</natureOfPayment>
    </securitiesToBeSold>
    <securitiesToBeSold>
      <securitiesClassTitle>Common</securitiesClassTitle>
      <acquiredDate>03/05/2012</acquiredDate>
      <natureOfAcquisitionTransaction>Stock Award</natureOfAcquisitionTransaction>
      <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
      <isGiftTransaction>N</isGiftTransaction>
      <amountOfSecuritiesAcquired>2300</amountOfSecuritiesAcquired>
      <paymentDate>03/05/2012</paymentDate>
      <natureOfPayment>Compensation</natureOfPayment>
    </securitiesToBeSold>
    <nothingToReportFlagOnSecuritiesSoldInPast3Months>Y</nothingToReportFlagOnSecuritiesSoldInPast3Months>
    <noticeSignature>
      <noticeDate>08/02/2023</noticeDate>
      <signature>/s/ Christian Nasser as a duly authorized representative of Fidelity Brokerage Services LLC, as attorney-in-fact for Raymond Parkinson</signature>
    </noticeSignature>
  </formData>
</edgarSubmission>
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144
0001551870
XXXXXXXX
LIVE
0000811596
KAISER ALUMINUM CORP
001-09447
27422 PORTOLA PARKWAY, SUITE 200
FOOTHILL RANCH
CA
92610-2831
949-614-1740
Parkinson Ray
Officer
Common
Fidelity Brokerage Services LLC
245 Summer Street
Boston
MA
02110
4727
377498.00
16013164
08/02/2023
Nasdaq
Common
03/05/2021
Stock Award
Issuer
N
1427
03/05/2021
Compensation
Common
03/05/2020
Stock Award
Issuer
N
1000
03/05/2020
Compensation
Common
03/05/2012
Stock Award
Issuer
N
2300
03/05/2012
Compensation
Y
08/02/2023
/s/ Christian Nasser as a duly authorized representative of Fidelity Brokerage Services LLC, as attorney-in-fact for Raymond Parkinson