<?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>0001601483</cik>
                    <ccc>XXXXXXXX</ccc>
                </filerCredentials>
            </filer>
            <liveTestFlag>LIVE</liveTestFlag>



        </filerInfo>
    </headerData>
    <formData>
        <issuerInfo>
            <issuerCik>0001824920</issuerCik>
            <issuerName>IONQ, INC.</issuerName>
            <secFileNumber>001-39694</secFileNumber>
            <issuerAddress>
                <ns2:street1>4505 Campus Drive</ns2:street1>
                <ns2:city>College Park</ns2:city>
                <ns2:stateOrCountry>MD</ns2:stateOrCountry>
                <ns2:zipCode>20740</ns2:zipCode>
            </issuerAddress>
            <issuerContactPhone>3012987997</issuerContactPhone>
            <nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>THOMAS G. KRAMER</nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>
            <relationshipsToIssuer>
                <relationshipToIssuer>Officer</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>8th Floor</ns2:street2>
                    <ns2:city>New York</ns2:city>
                    <ns2:stateOrCountry>NY</ns2:stateOrCountry>
                    <ns2:zipCode>10004</ns2:zipCode>
                </address>
            </brokerOrMarketmakerDetails>
            <noOfUnitsSold>432000</noOfUnitsSold>
            <aggregateMarketValue>16346880.00</aggregateMarketValue>
            <noOfUnitsOutstanding>247783086</noOfUnitsOutstanding>
            <approxSaleDate>06/16/2025</approxSaleDate>
            <securitiesExchangeName>NYSE</securitiesExchangeName>
        </securitiesInformation>
        <securitiesToBeSold>
            <securitiesClassTitle>Common</securitiesClassTitle>
            <acquiredDate>02/24/2021</acquiredDate>
            <natureOfAcquisitionTransaction>Previously Exercised Options</natureOfAcquisitionTransaction>
            <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
            <isGiftTransaction>N</isGiftTransaction>
            <amountOfSecuritiesAcquired>432000</amountOfSecuritiesAcquired>
            <paymentDate>02/24/2021</paymentDate>
            <natureOfPayment>Cash</natureOfPayment>
        </securitiesToBeSold>
        <nothingToReportFlagOnSecuritiesSoldInPast3Months>N</nothingToReportFlagOnSecuritiesSoldInPast3Months>
        <securitiesSoldInPast3Months>
            <sellerDetails>
                <name>THOMAS G. KRAMER</name>
                <address>
                    <ns2:street1>4505 Campus Drive</ns2:street1>
                    <ns2:city>College Park</ns2:city>
                    <ns2:stateOrCountry>MD</ns2:stateOrCountry>
                    <ns2:zipCode>20740</ns2:zipCode>
                </address>
            </sellerDetails>
            <securitiesClassTitle>Common</securitiesClassTitle>
            <saleDate>06/11/2025</saleDate>
            <amountOfSecuritiesSold>9994</amountOfSecuritiesSold>
            <grossProceeds>415704.43</grossProceeds>
        </securitiesSoldInPast3Months>
        <noticeSignature>
            <noticeDate>06/16/2025</noticeDate>
            <planAdoptionDates>
                <planAdoptionDate>03/14/2025</planAdoptionDate>
            </planAdoptionDates>
            <signature>/s/ Thomas Kramer</signature>
        </noticeSignature>
    </formData>
</edgarSubmission>
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144
0001601483
XXXXXXXX
LIVE
0001824920
IONQ, INC.
001-39694
4505 Campus Drive
College Park
MD
20740
3012987997
THOMAS G. KRAMER
Officer
Common
Morgan Stanley Smith Barney LLC Executive Financial Services
1 New York Plaza
8th Floor
New York
NY
10004
432000
16346880.00
247783086
06/16/2025
NYSE
Common
02/24/2021
Previously Exercised Options
Issuer
N
432000
02/24/2021
Cash
N
THOMAS G. KRAMER
4505 Campus Drive
College Park
MD
20740
Common
06/11/2025
9994
415704.43
06/16/2025
03/14/2025
/s/ Thomas Kramer