<?xml version="1.0" encoding="UTF-8"?><edgarSubmission xmlns="http://www.sec.gov/edgar/ownership" xmlns:ns2="http://www.sec.gov/edgar/common">
    <headerData>
        <submissionType>144</submissionType>
        <filerInfo>
            <filer>
                <filerCredentials>
                    <cik>0001714701</cik>
                    <ccc>XXXXXXXX</ccc>
                </filerCredentials>
            </filer>
            <liveTestFlag>LIVE</liveTestFlag>



        </filerInfo>
    </headerData>
    <formData>
        <issuerInfo>
            <issuerCik>0000857005</issuerCik>
            <issuerName>PTC INC.</issuerName>
            <secFileNumber>000-18059</secFileNumber>
            <issuerAddress>
                <ns2:street1>121 Seaport Boulevard</ns2:street1>
                <ns2:city>Boston</ns2:city>
                <ns2:stateOrCountry>MA</ns2:stateOrCountry>
                <ns2:zipCode>02210</ns2:zipCode>
            </issuerAddress>
            <issuerContactPhone>(781) 370-5000</issuerContactPhone>
            <nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>CORINNA LATHAN</nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>
            <relationshipsToIssuer>
                <relationshipToIssuer>Director</relationshipToIssuer>
            </relationshipsToIssuer>
        </issuerInfo>
        <securitiesInformation>
            <securitiesClassTitle>Common</securitiesClassTitle>
            <brokerOrMarketmakerDetails>
                <name>Morgan Stanley Smith Barney LLC Executive Financial Services</name>
                <address>
                    <ns2:street1>1 New York Plaza</ns2:street1>
                    <ns2:street2>38th Floor</ns2:street2>
                    <ns2:city>New York</ns2:city>
                    <ns2:stateOrCountry>NY</ns2:stateOrCountry>
                    <ns2:zipCode>10004</ns2:zipCode>
                </address>
            </brokerOrMarketmakerDetails>
            <noOfUnitsSold>800</noOfUnitsSold>
            <aggregateMarketValue>112568.00</aggregateMarketValue>
            <noOfUnitsOutstanding>118833211</noOfUnitsOutstanding>
            <approxSaleDate>09/15/2023</approxSaleDate>
            <securitiesExchangeName>NASDAQ</securitiesExchangeName>
        </securitiesInformation>
        <securitiesToBeSold>
            <securitiesClassTitle>Common</securitiesClassTitle>
            <acquiredDate>08/15/2019</acquiredDate>
            <natureOfAcquisitionTransaction>Restricted Stock</natureOfAcquisitionTransaction>
            <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
            <isGiftTransaction>N</isGiftTransaction>
            <amountOfSecuritiesAcquired>800</amountOfSecuritiesAcquired>
            <paymentDate>08/15/2019</paymentDate>
            <natureOfPayment>Not Applicable</natureOfPayment>
        </securitiesToBeSold>
        <nothingToReportFlagOnSecuritiesSoldInPast3Months>Y</nothingToReportFlagOnSecuritiesSoldInPast3Months>
        <noticeSignature>
            <noticeDate>09/15/2023</noticeDate>
            <planAdoptionDates>
                <planAdoptionDate>09/06/2022</planAdoptionDate>
            </planAdoptionDates>
            <signature>/s/ Corinna Lathan</signature>
        </noticeSignature>
    </formData>
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144
0001714701
XXXXXXXX
LIVE
0000857005
PTC INC.
000-18059
121 Seaport Boulevard
Boston
MA
02210
(781) 370-5000
CORINNA LATHAN
Director
Common
Morgan Stanley Smith Barney LLC Executive Financial Services
1 New York Plaza
38th Floor
New York
NY
10004
800
112568.00
118833211
09/15/2023
NASDAQ
Common
08/15/2019
Restricted Stock
Issuer
N
800
08/15/2019
Not Applicable
Y
09/15/2023
09/06/2022
/s/ Corinna Lathan