<?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>0001670723</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>INDER SINGH</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>8th Floor</ns2:street2>
                    <ns2:city>New York</ns2:city>
                    <ns2:stateOrCountry>NY</ns2:stateOrCountry>
                    <ns2:zipCode>10004</ns2:zipCode>
                </address>
            </brokerOrMarketmakerDetails>
            <noOfUnitsSold>80481</noOfUnitsSold>
            <aggregateMarketValue>3195095.70</aggregateMarketValue>
            <noOfUnitsOutstanding>247783086</noOfUnitsOutstanding>
            <approxSaleDate>06/12/2025</approxSaleDate>
            <securitiesExchangeName>NYSE</securitiesExchangeName>
        </securitiesInformation>
        <securitiesToBeSold>
            <securitiesClassTitle>Common</securitiesClassTitle>
            <acquiredDate>06/12/2025</acquiredDate>
            <natureOfAcquisitionTransaction>Exercise of Stock Options</natureOfAcquisitionTransaction>
            <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
            <isGiftTransaction>N</isGiftTransaction>
            <amountOfSecuritiesAcquired>20000</amountOfSecuritiesAcquired>
            <paymentDate>06/12/2025</paymentDate>
            <natureOfPayment>Cash</natureOfPayment>
        </securitiesToBeSold>
        <securitiesToBeSold>
            <securitiesClassTitle>Common</securitiesClassTitle>
            <acquiredDate>05/25/2023</acquiredDate>
            <natureOfAcquisitionTransaction>Restricted Stock Units</natureOfAcquisitionTransaction>
            <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
            <isGiftTransaction>N</isGiftTransaction>
            <amountOfSecuritiesAcquired>60481</amountOfSecuritiesAcquired>
            <paymentDate>05/25/2023</paymentDate>
            <natureOfPayment>N/A</natureOfPayment>
        </securitiesToBeSold>
        <nothingToReportFlagOnSecuritiesSoldInPast3Months>Y</nothingToReportFlagOnSecuritiesSoldInPast3Months>
        <remarks>The securities to be sold were and will be received upon the exercise of stock options over the next three months. The dates of acquisition and payment were and will be the dates of exercise/sale.
The securities to be sold were acquired upon the vesting of restricted stock units during the period of 05/25/2023 through 06/06/2025
</remarks>
        <noticeSignature>
            <noticeDate>06/12/2025</noticeDate>
            <planAdoptionDates>
                <planAdoptionDate>03/13/2025</planAdoptionDate>
            </planAdoptionDates>
            <signature>/s/ Inder Sigh</signature>
        </noticeSignature>
    </formData>
</edgarSubmission>
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144
0001670723
XXXXXXXX
LIVE
0001824920
IONQ, INC.
001-39694
4505 Campus Drive
College Park
MD
20740
3012987997
INDER SINGH
Director
Common
Morgan Stanley Smith Barney LLC Executive Financial Services
1 New York Plaza
8th Floor
New York
NY
10004
80481
3195095.70
247783086
06/12/2025
NYSE
Common
06/12/2025
Exercise of Stock Options
Issuer
N
20000
06/12/2025
Cash
Common
05/25/2023
Restricted Stock Units
Issuer
N
60481
05/25/2023
N/A
Y
The securities to be sold were and will be received upon the exercise of stock options over the next three months. The dates of acquisition and payment were and will be the dates of exercise/sale.
The securities to be sold were acquired upon the vesting of restricted stock units during the period of 05/25/2023 through 06/06/2025
06/12/2025
03/13/2025
/s/ Inder Sigh