<?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>0001937040</cik>
          <ccc>XXXXXXXX</ccc>
        </filerCredentials>
      </filer>
      <liveTestFlag>LIVE</liveTestFlag>



    </filerInfo>
  </headerData>
  <formData>
    <issuerInfo>
      <issuerCik>0001038357</issuerCik>
      <issuerName>PIONEER NATURAL RESOURCES CO</issuerName>
      <secFileNumber>001-13245</secFileNumber>
      <issuerAddress>
        <com:street1>777 HIDDEN RIDGE</com:street1>
        <com:city>IRVING</com:city>
        <com:stateOrCountry>TX</com:stateOrCountry>
        <com:zipCode>75038</com:zipCode>
      </issuerAddress>
      <issuerContactPhone>9724449001</issuerContactPhone>
      <nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>Hernandez Jacinto J</nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>
      <relationshipsToIssuer>
        <relationshipToIssuer>Former Director</relationshipToIssuer>
      </relationshipsToIssuer>
    </issuerInfo>
    <securitiesInformation>
      <securitiesClassTitle>Common</securitiesClassTitle>
      <brokerOrMarketmakerDetails>
        <name>Charles Schwab &amp; Co., Inc.</name>
        <address>
          <com:street1>3000 Schwab Way</com:street1>
          <com:city>Westlake</com:city>
          <com:stateOrCountry>TX</com:stateOrCountry>
          <com:zipCode>76262</com:zipCode>
        </address>
      </brokerOrMarketmakerDetails>
      <noOfUnitsSold>588</noOfUnitsSold>
      <aggregateMarketValue>125244.00</aggregateMarketValue>
      <noOfUnitsOutstanding>233735537</noOfUnitsOutstanding>
      <approxSaleDate>07/18/2023</approxSaleDate>
      <securitiesExchangeName>NYSE</securitiesExchangeName>
    </securitiesInformation>
    <securitiesToBeSold>
      <securitiesClassTitle>Common</securitiesClassTitle>
      <acquiredDate>11/08/2022</acquiredDate>
      <natureOfAcquisitionTransaction>Open Market Purchase</natureOfAcquisitionTransaction>
      <nameOfPersonfromWhomAcquired>PIONEER NATURAL RESOURCES COMPANY</nameOfPersonfromWhomAcquired>
      <isGiftTransaction>N</isGiftTransaction>
      <amountOfSecuritiesAcquired>390</amountOfSecuritiesAcquired>
      <paymentDate>11/08/2022</paymentDate>
      <natureOfPayment>Cash</natureOfPayment>
    </securitiesToBeSold>
    <securitiesToBeSold>
      <securitiesClassTitle>Common</securitiesClassTitle>
      <acquiredDate>11/09/2022</acquiredDate>
      <natureOfAcquisitionTransaction>Open Market Purchase</natureOfAcquisitionTransaction>
      <nameOfPersonfromWhomAcquired>PIONEER NATURAL RESOURCES COMPANY</nameOfPersonfromWhomAcquired>
      <isGiftTransaction>N</isGiftTransaction>
      <amountOfSecuritiesAcquired>198</amountOfSecuritiesAcquired>
      <paymentDate>11/09/2022</paymentDate>
      <natureOfPayment>Cash</natureOfPayment>
    </securitiesToBeSold>
    <nothingToReportFlagOnSecuritiesSoldInPast3Months>Y</nothingToReportFlagOnSecuritiesSoldInPast3Months>
    <noticeSignature>
      <noticeDate>07/18/2023</noticeDate>
      <signature>Jacinto J Hernandez</signature>
    </noticeSignature>
  </formData>
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144
0001937040
XXXXXXXX
LIVE
0001038357
PIONEER NATURAL RESOURCES CO
001-13245
777 HIDDEN RIDGE
IRVING
TX
75038
9724449001
Hernandez Jacinto J
Former Director
Common
Charles Schwab & Co., Inc.
3000 Schwab Way
Westlake
TX
76262
588
125244.00
233735537
07/18/2023
NYSE
Common
11/08/2022
Open Market Purchase
PIONEER NATURAL RESOURCES COMPANY
N
390
11/08/2022
Cash
Common
11/09/2022
Open Market Purchase
PIONEER NATURAL RESOURCES COMPANY
N
198
11/09/2022
Cash
Y
07/18/2023
Jacinto J Hernandez