<?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>0001419490</cik>
          <ccc>XXXXXXXX</ccc>
        </filerCredentials>
      </filer>
      <liveTestFlag>LIVE</liveTestFlag>



    </filerInfo>
  </headerData>
  <formData>
    <issuerInfo>
      <issuerCik>0001097149</issuerCik>
      <issuerName>ALIGN TECHNOLOGY INC</issuerName>
      <secFileNumber>000-32259</secFileNumber>
      <issuerAddress>
        <com:street1>410 NORTH SCOTTSDALE ROAD, SUITE 1300</com:street1>
        <com:city>TEMPE</com:city>
        <com:stateOrCountry>AZ</com:stateOrCountry>
        <com:zipCode>85288</com:zipCode>
      </issuerAddress>
      <issuerContactPhone>408-470-1000</issuerContactPhone>
      <nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>Wright Emory</nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>
      <relationshipsToIssuer>
        <relationshipToIssuer>Director</relationshipToIssuer>
      </relationshipsToIssuer>
    </issuerInfo>
    <securitiesInformation>
      <securitiesClassTitle>Common</securitiesClassTitle>
      <brokerOrMarketmakerDetails>
        <name>Charles Schwab Corporation</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>2524</noOfUnitsSold>
      <aggregateMarketValue>728174.00</aggregateMarketValue>
      <noOfUnitsOutstanding>76589114</noOfUnitsOutstanding>
      <approxSaleDate>02/07/2024</approxSaleDate>
      <securitiesExchangeName>NASDAQ</securitiesExchangeName>
    </securitiesInformation>
    <securitiesToBeSold>
      <securitiesClassTitle>Common</securitiesClassTitle>
      <acquiredDate>02/20/2020</acquiredDate>
      <natureOfAcquisitionTransaction>Executive Compensation</natureOfAcquisitionTransaction>
      <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
      <isGiftTransaction>N</isGiftTransaction>
      <amountOfSecuritiesAcquired>2524</amountOfSecuritiesAcquired>
      <paymentDate>02/20/2020</paymentDate>
      <natureOfPayment>Executive Compensation</natureOfPayment>
    </securitiesToBeSold>
    <nothingToReportFlagOnSecuritiesSoldInPast3Months>Y</nothingToReportFlagOnSecuritiesSoldInPast3Months>
    <remarks>Shares to be sold in the following accounts: WRIGHT TEW IRREVOCABLE TRUST - EMORY WRIGHT TTEE / 757 shares
WRIGHT TBH IRREVO TRUST - TTEE EMORY WRIGHT / 253 shares
WRIGHT MMW IRREVOCABLE TRUST - EMORY WRIGHT TTEE/ 757 shares
WRIGHT HJW IRREVOCABLE TRUST - EMORY WRIGHT TTEE / 757 shares</remarks>
    <noticeSignature>
      <noticeDate>02/07/2024</noticeDate>
      <signature>EMORY WRIGHT</signature>
    </noticeSignature>
  </formData>
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144
0001419490
XXXXXXXX
LIVE
0001097149
ALIGN TECHNOLOGY INC
000-32259
410 NORTH SCOTTSDALE ROAD, SUITE 1300
TEMPE
AZ
85288
408-470-1000
Wright Emory
Director
Common
Charles Schwab Corporation
3000 Schwab Way
Westlake
TX
76262
2524
728174.00
76589114
02/07/2024
NASDAQ
Common
02/20/2020
Executive Compensation
Issuer
N
2524
02/20/2020
Executive Compensation
Y
Shares to be sold in the following accounts: WRIGHT TEW IRREVOCABLE TRUST - EMORY WRIGHT TTEE / 757 shares
WRIGHT TBH IRREVO TRUST - TTEE EMORY WRIGHT / 253 shares
WRIGHT MMW IRREVOCABLE TRUST - EMORY WRIGHT TTEE/ 757 shares
WRIGHT HJW IRREVOCABLE TRUST - EMORY WRIGHT TTEE / 757 shares
02/07/2024
EMORY WRIGHT