<?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>0001409312</cik>
          <ccc>XXXXXXXX</ccc>
        </filerCredentials>
      </filer>
      <liveTestFlag>LIVE</liveTestFlag>



    </filerInfo>
  </headerData>
  <formData>
    <issuerInfo>
      <issuerCik>0000052988</issuerCik>
      <issuerName>JACOBS SOLUTIONS INC.</issuerName>
      <secFileNumber>001-07463</secFileNumber>
      <issuerAddress>
        <com:street1>1999 BRYAN STREET, SUITE 1200</com:street1>
        <com:city>DALLAS</com:city>
        <com:stateOrCountry>TX</com:stateOrCountry>
        <com:zipCode>75201</com:zipCode>
      </issuerAddress>
      <issuerContactPhone>214-583-8500</issuerContactPhone>
      <nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>EBERHART RALPH E</nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>
      <relationshipsToIssuer>
        <relationshipToIssuer>Director</relationshipToIssuer>
      </relationshipsToIssuer>
    </issuerInfo>
    <securitiesInformation>
      <securitiesClassTitle>Common</securitiesClassTitle>
      <brokerOrMarketmakerDetails>
        <name>Fidelity Brokerage Services LLC</name>
        <address>
          <com:street1>100 Summer Street</com:street1>
          <com:city>Boston</com:city>
          <com:stateOrCountry>MA</com:stateOrCountry>
          <com:zipCode>02110</com:zipCode>
        </address>
      </brokerOrMarketmakerDetails>
      <noOfUnitsSold>3500</noOfUnitsSold>
      <aggregateMarketValue>424375.00</aggregateMarketValue>
      <noOfUnitsOutstanding>126714126</noOfUnitsOutstanding>
      <approxSaleDate>02/21/2023</approxSaleDate>
      <securitiesExchangeName>NYSE</securitiesExchangeName>
    </securitiesInformation>
    <securitiesToBeSold>
      <securitiesClassTitle>Common</securitiesClassTitle>
      <acquiredDate>02/21/2023</acquiredDate>
      <natureOfAcquisitionTransaction>Option Granted 03/01/2013</natureOfAcquisitionTransaction>
      <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
      <isGiftTransaction>N</isGiftTransaction>
      <amountOfSecuritiesAcquired>3500</amountOfSecuritiesAcquired>
      <paymentDate>02/21/2023</paymentDate>
      <natureOfPayment>Cash</natureOfPayment>
    </securitiesToBeSold>
    <nothingToReportFlagOnSecuritiesSoldInPast3Months>Y</nothingToReportFlagOnSecuritiesSoldInPast3Months>
    <noticeSignature>
      <noticeDate>02/21/2023</noticeDate>
      <signature>/s/ WADE MOSS, as a duly authorized representative of Fidelity Brokerage Services LLC, as attorney-in-fact for Ralph Eberhart</signature>
    </noticeSignature>
  </formData>
</edgarSubmission>
[{"type": "144", "sequence": "1", "filename": "primary_doc.xml", "secsgml_size_bytes": 2829}]
144
0001409312
XXXXXXXX
LIVE
0000052988
JACOBS SOLUTIONS INC.
001-07463
1999 BRYAN STREET, SUITE 1200
DALLAS
TX
75201
214-583-8500
EBERHART RALPH E
Director
Common
Fidelity Brokerage Services LLC
100 Summer Street
Boston
MA
02110
3500
424375.00
126714126
02/21/2023
NYSE
Common
02/21/2023
Option Granted 03/01/2013
Issuer
N
3500
02/21/2023
Cash
Y
02/21/2023
/s/ WADE MOSS, as a duly authorized representative of Fidelity Brokerage Services LLC, as attorney-in-fact for Ralph Eberhart