<?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>0001888910</cik>
          <ccc>XXXXXXXX</ccc>
        </filerCredentials>
      </filer>
      <liveTestFlag>LIVE</liveTestFlag>



    </filerInfo>
  </headerData>
  <formData>
    <issuerInfo>
      <issuerCik>0000105016</issuerCik>
      <issuerName>WATSCO INC</issuerName>
      <secFileNumber>001-05581</secFileNumber>
      <issuerAddress>
        <com:street1>2665 S BAYSHORE DR</com:street1>
        <com:street2>STE 901</com:street2>
        <com:city>COCONUT GROVE</com:city>
        <com:stateOrCountry>FL</com:stateOrCountry>
        <com:zipCode>33133</com:zipCode>
      </issuerAddress>
      <issuerContactPhone>305-714-4100</issuerContactPhone>
      <nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>Macdonald John Alexander</nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>
      <relationshipsToIssuer>
        <relationshipToIssuer>Director</relationshipToIssuer>
      </relationshipsToIssuer>
    </issuerInfo>
    <securitiesInformation>
      <securitiesClassTitle>Common</securitiesClassTitle>
      <brokerOrMarketmakerDetails>
        <name>TD Direct Investing</name>
        <address>
          <com:street1>3500 Steeles Ave East</com:street1>
          <com:city>Markham</com:city>
          <com:stateOrCountry>A6</com:stateOrCountry>
          <com:zipCode>L3R 0X1</com:zipCode>
        </address>
      </brokerOrMarketmakerDetails>
      <noOfUnitsSold>1000</noOfUnitsSold>
      <aggregateMarketValue>472330.00</aggregateMarketValue>
      <noOfUnitsOutstanding>34747547</noOfUnitsOutstanding>
      <approxSaleDate>05/09/2024</approxSaleDate>
      <securitiesExchangeName>NYSE</securitiesExchangeName>
    </securitiesInformation>
    <securitiesInformation>
      <securitiesClassTitle>Common</securitiesClassTitle>
      <brokerOrMarketmakerDetails>
        <name>TD Direct Investing</name>
        <address>
          <com:street1>3500 Steeles Ave. East</com:street1>
          <com:city>Markham</com:city>
          <com:stateOrCountry>A6</com:stateOrCountry>
          <com:zipCode>L3R 0X1</com:zipCode>
        </address>
      </brokerOrMarketmakerDetails>
      <noOfUnitsSold>3334</noOfUnitsSold>
      <aggregateMarketValue>1574748.22</aggregateMarketValue>
      <noOfUnitsOutstanding>34747547</noOfUnitsOutstanding>
      <approxSaleDate>05/09/2024</approxSaleDate>
      <securitiesExchangeName>NYSE</securitiesExchangeName>
    </securitiesInformation>
    <securitiesInformation>
      <securitiesClassTitle>Common</securitiesClassTitle>
      <brokerOrMarketmakerDetails>
        <name>TD Direct Investing</name>
        <address>
          <com:street1>3500 Steeles Ave East</com:street1>
          <com:city>Markham</com:city>
          <com:stateOrCountry>A6</com:stateOrCountry>
          <com:zipCode>L3R 0X1</com:zipCode>
        </address>
      </brokerOrMarketmakerDetails>
      <noOfUnitsSold>1000</noOfUnitsSold>
      <aggregateMarketValue>472330.00</aggregateMarketValue>
      <noOfUnitsOutstanding>34747547</noOfUnitsOutstanding>
      <approxSaleDate>05/09/2024</approxSaleDate>
      <securitiesExchangeName>NYSE</securitiesExchangeName>
    </securitiesInformation>
    <securitiesToBeSold>
      <securitiesClassTitle>Common</securitiesClassTitle>
      <acquiredDate>05/08/2024</acquiredDate>
      <natureOfAcquisitionTransaction>Exercise of Options under registered plan</natureOfAcquisitionTransaction>
      <nameOfPersonfromWhomAcquired>Watsco</nameOfPersonfromWhomAcquired>
      <isGiftTransaction>N</isGiftTransaction>
      <amountOfSecuritiesAcquired>1000</amountOfSecuritiesAcquired>
      <paymentDate>05/08/2024</paymentDate>
      <natureOfPayment>Compensation</natureOfPayment>
    </securitiesToBeSold>
    <securitiesToBeSold>
      <securitiesClassTitle>Common</securitiesClassTitle>
      <acquiredDate>05/08/2024</acquiredDate>
      <natureOfAcquisitionTransaction>Exercise of Options under registered plan</natureOfAcquisitionTransaction>
      <nameOfPersonfromWhomAcquired>Watsco</nameOfPersonfromWhomAcquired>
      <isGiftTransaction>N</isGiftTransaction>
      <amountOfSecuritiesAcquired>3334</amountOfSecuritiesAcquired>
      <paymentDate>05/08/2024</paymentDate>
      <natureOfPayment>Compensation</natureOfPayment>
    </securitiesToBeSold>
    <securitiesToBeSold>
      <securitiesClassTitle>Common</securitiesClassTitle>
      <acquiredDate>11/19/2021</acquiredDate>
      <natureOfAcquisitionTransaction>Exercise of options under a registered plan</natureOfAcquisitionTransaction>
      <nameOfPersonfromWhomAcquired>Watsco</nameOfPersonfromWhomAcquired>
      <isGiftTransaction>N</isGiftTransaction>
      <amountOfSecuritiesAcquired>1000</amountOfSecuritiesAcquired>
      <paymentDate>11/19/2021</paymentDate>
      <natureOfPayment>Compensation</natureOfPayment>
    </securitiesToBeSold>
    <nothingToReportFlagOnSecuritiesSoldInPast3Months>Y</nothingToReportFlagOnSecuritiesSoldInPast3Months>
    <noticeSignature>
      <noticeDate>05/06/2024</noticeDate>
      <signature>John Alexander Macdonald</signature>
    </noticeSignature>
  </formData>
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144
0001888910
XXXXXXXX
LIVE
0000105016
WATSCO INC
001-05581
2665 S BAYSHORE DR
STE 901
COCONUT GROVE
FL
33133
305-714-4100
Macdonald John Alexander
Director
Common
TD Direct Investing
3500 Steeles Ave East
Markham
A6
L3R 0X1
1000
472330.00
34747547
05/09/2024
NYSE
Common
TD Direct Investing
3500 Steeles Ave. East
Markham
A6
L3R 0X1
3334
1574748.22
34747547
05/09/2024
NYSE
Common
TD Direct Investing
3500 Steeles Ave East
Markham
A6
L3R 0X1
1000
472330.00
34747547
05/09/2024
NYSE
Common
05/08/2024
Exercise of Options under registered plan
Watsco
N
1000
05/08/2024
Compensation
Common
05/08/2024
Exercise of Options under registered plan
Watsco
N
3334
05/08/2024
Compensation
Common
11/19/2021
Exercise of options under a registered plan
Watsco
N
1000
11/19/2021
Compensation
Y
05/06/2024
John Alexander Macdonald