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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        <filer>
          <filerCredentials>
            <cik>0001672083</cik>
            <ccc>XXXXXXXX</ccc>
          </filerCredentials>
        </filer>
        <liveTestFlag>LIVE</liveTestFlag>
  
  
  
      </filerInfo>
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      <issuerInfo>
        <issuerCik>0001650729</issuerCik>
        <issuerName>SiteOne Landscape Supply, Inc.</issuerName>
        <secFileNumber>001-37760</secFileNumber>
        <issuerAddress>
          <com:street1>MANSELL OVERLOOK</com:street1>
          <com:street2>300 COLONIAL CENTER PARKWAY, SUITE 600</com:street2>
          <com:city>ROSWELL</com:city>
          <com:stateOrCountry>GA</com:stateOrCountry>
          <com:zipCode>30076</com:zipCode>
        </issuerAddress>
        <issuerContactPhone>(470) 277-7000</issuerContactPhone>
        <nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>BLACK DOUG</nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>
        <relationshipsToIssuer>
          <relationshipToIssuer>Officer</relationshipToIssuer>
          <relationshipToIssuer>Director</relationshipToIssuer>
        </relationshipsToIssuer>
      </issuerInfo>
      <securitiesInformation>
        <securitiesClassTitle>Common</securitiesClassTitle>
        <brokerOrMarketmakerDetails>
          <name>Fidelity Brokerage Services LLC</name>
          <address>
            <com:street1>900 Salem Street</com:street1>
            <com:city>Smithfield</com:city>
            <com:stateOrCountry>RI</com:stateOrCountry>
            <com:zipCode>02917</com:zipCode>
          </address>
        </brokerOrMarketmakerDetails>
        <noOfUnitsSold>8000</noOfUnitsSold>
        <aggregateMarketValue>1256480.00</aggregateMarketValue>
        <noOfUnitsOutstanding>45058416</noOfUnitsOutstanding>
        <approxSaleDate>09/20/2023</approxSaleDate>
        <securitiesExchangeName>NYSE</securitiesExchangeName>
      </securitiesInformation>
      <securitiesToBeSold>
        <securitiesClassTitle>Common</securitiesClassTitle>
        <acquiredDate>09/20/2023</acquiredDate>
        <natureOfAcquisitionTransaction>Options Granted - 05/19/2014</natureOfAcquisitionTransaction>
        <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
        <isGiftTransaction>N</isGiftTransaction>
        <amountOfSecuritiesAcquired>8000</amountOfSecuritiesAcquired>
        <paymentDate>09/20/2023</paymentDate>
        <natureOfPayment>Cash</natureOfPayment>
      </securitiesToBeSold>
      <nothingToReportFlagOnSecuritiesSoldInPast3Months>N</nothingToReportFlagOnSecuritiesSoldInPast3Months>
      <securitiesSoldInPast3Months>
        <sellerDetails>
          <name>Doug Black</name>
          <address>
            <com:street1>300 Colonial Center Parkway</com:street1>
            <com:street2>Suite 600</com:street2>
            <com:city>Roswell</com:city>
            <com:stateOrCountry>GA</com:stateOrCountry>
            <com:zipCode>30076</com:zipCode>
          </address>
        </sellerDetails>
        <securitiesClassTitle>Common</securitiesClassTitle>
        <saleDate>06/21/2023</saleDate>
        <amountOfSecuritiesSold>8000</amountOfSecuritiesSold>
        <grossProceeds>1290572.80</grossProceeds>
      </securitiesSoldInPast3Months>
      <securitiesSoldInPast3Months>
        <sellerDetails>
          <name>Doug Black</name>
          <address>
            <com:street1>300 Colonial Center Parkway</com:street1>
            <com:street2>Suite 600</com:street2>
            <com:city>Roswell</com:city>
            <com:stateOrCountry>GA</com:stateOrCountry>
            <com:zipCode>30076</com:zipCode>
          </address>
        </sellerDetails>
        <securitiesClassTitle>Common</securitiesClassTitle>
        <saleDate>07/19/2023</saleDate>
        <amountOfSecuritiesSold>8000</amountOfSecuritiesSold>
        <grossProceeds>1338666.40</grossProceeds>
      </securitiesSoldInPast3Months>
      <securitiesSoldInPast3Months>
        <sellerDetails>
          <name>Doug Black</name>
          <address>
            <com:street1>300 Colonial Center Parkway</com:street1>
            <com:street2>Suite 600</com:street2>
            <com:city>Roswell</com:city>
            <com:stateOrCountry>GA</com:stateOrCountry>
            <com:zipCode>30076</com:zipCode>
          </address>
        </sellerDetails>
        <securitiesClassTitle>Common</securitiesClassTitle>
        <saleDate>08/23/2023</saleDate>
        <amountOfSecuritiesSold>8000</amountOfSecuritiesSold>
        <grossProceeds>1254314.40</grossProceeds>
      </securitiesSoldInPast3Months>
      <noticeSignature>
        <noticeDate>09/20/2023</noticeDate>
        <planAdoptionDates>
          <planAdoptionDate>02/22/2023</planAdoptionDate>
        </planAdoptionDates>
        <signature>/s/ Rae Pierson, as a duly authorized representative of Fidelity Brokerage Services LLC, as attorney-in-fact for Doug C Black</signature>
      </noticeSignature>
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text: 144
  0001672083
  XXXXXXXX
  LIVE
  0001650729
  SiteOne Landscape Supply, Inc.
  001-37760
  MANSELL OVERLOOK
  300 COLONIAL CENTER PARKWAY, SUITE 600
  ROSWELL
  GA
  30076
  (470) 277-7000
  BLACK DOUG
  Officer
  Director
  Common
  Fidelity Brokerage Services LLC
  900 Salem Street
  Smithfield
  RI
  02917
  8000
  1256480.00
  45058416
  09/20/2023
  NYSE
  Common
  09/20/2023
  Options Granted - 05/19/2014
  Issuer
  N
  8000
  09/20/2023
  Cash
  N
  Doug Black
  300 Colonial Center Parkway
  Suite 600
  Roswell
  GA
  30076
  Common
  06/21/2023
  8000
  1290572.80
  Doug Black
  300 Colonial Center Parkway
  Suite 600
  Roswell
  GA
  30076
  Common
  07/19/2023
  8000
  1338666.40
  Doug Black
  300 Colonial Center Parkway
  Suite 600
  Roswell
  GA
  30076
  Common
  08/23/2023
  8000
  1254314.40
  09/20/2023
  02/22/2023
  /s/ Rae Pierson, as a duly authorized representative of Fidelity Brokerage Services LLC, as attorney-in-fact for Doug C Black