<?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>0001958061</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>RIMA ALAMEDDINE </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>45000</noOfUnitsSold>
            <aggregateMarketValue>1997550.00</aggregateMarketValue>
            <noOfUnitsOutstanding>247783086</noOfUnitsOutstanding>
            <approxSaleDate>07/07/2025</approxSaleDate>
            <securitiesExchangeName>NYSE</securitiesExchangeName>
        </securitiesInformation>
        <securitiesToBeSold>
            <securitiesClassTitle>Common</securitiesClassTitle>
            <acquiredDate>07/07/2025</acquiredDate>
            <natureOfAcquisitionTransaction>Exercise of Stock Options</natureOfAcquisitionTransaction>
            <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
            <isGiftTransaction>N</isGiftTransaction>
            <amountOfSecuritiesAcquired>45000</amountOfSecuritiesAcquired>
            <paymentDate>07/07/2025</paymentDate>
            <natureOfPayment>Cash</natureOfPayment>
        </securitiesToBeSold>
        <nothingToReportFlagOnSecuritiesSoldInPast3Months>N</nothingToReportFlagOnSecuritiesSoldInPast3Months>
        <securitiesSoldInPast3Months>
            <sellerDetails>
                <name>10b5-1 Sales for RIMA IBRAHIM</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>06/13/2025</saleDate>
            <amountOfSecuritiesSold>65000</amountOfSecuritiesSold>
            <grossProceeds>2506758.50</grossProceeds>
        </securitiesSoldInPast3Months>
        <securitiesSoldInPast3Months>
            <sellerDetails>
                <name>RIMA  ALAMEDDINE </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>19976</amountOfSecuritiesSold>
            <grossProceeds>830909.71</grossProceeds>
        </securitiesSoldInPast3Months>
        <noticeSignature>
            <noticeDate>07/07/2025</noticeDate>
            <planAdoptionDates>
                <planAdoptionDate>03/14/2025</planAdoptionDate>
            </planAdoptionDates>
            <signature>/s/ Rima Alameddine</signature>
        </noticeSignature>
    </formData>
</edgarSubmission>
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144
0001958061
XXXXXXXX
LIVE
0001824920
IONQ, INC.
001-39694
4505 Campus Drive
College Park
MD
20740
3012987997
RIMA ALAMEDDINE
Officer
Common
Morgan Stanley Smith Barney LLC Executive Financial Services
1 New York Plaza
8th Floor
New York
NY
10004
45000
1997550.00
247783086
07/07/2025
NYSE
Common
07/07/2025
Exercise of Stock Options
Issuer
N
45000
07/07/2025
Cash
N
10b5-1 Sales for RIMA IBRAHIM
4505 Campus Drive
College Park
MD
20740
Common
06/13/2025
65000
2506758.50
RIMA  ALAMEDDINE
4505 Campus Drive
College Park
MD
20740
Common
06/11/2025
19976
830909.71
07/07/2025
03/14/2025
/s/ Rima Alameddine