<?xml version="1.0" encoding="UTF-8"?><edgarSubmission xmlns="http://www.sec.gov/edgar/ownership" xmlns:ns2="http://www.sec.gov/edgar/common">
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            <filer>
                <filerCredentials>
                    <cik>0001801141</cik>
                    <ccc>XXXXXXXX</ccc>
                </filerCredentials>
            </filer>
            <liveTestFlag>LIVE</liveTestFlag>



        </filerInfo>
    </headerData>
    <formData>
        <issuerInfo>
            <issuerCik>0001441816</issuerCik>
            <issuerName>MONGODB, INC.</issuerName>
            <secFileNumber>001-38240</secFileNumber>
            <issuerAddress>
                <ns2:street1>1633 Broadway, 38th floor</ns2:street1>
                <ns2:city>New York</ns2:city>
                <ns2:stateOrCountry>NY</ns2:stateOrCountry>
                <ns2:zipCode>10019</ns2:zipCode>
            </issuerAddress>
            <issuerContactPhone>646-727-4092</issuerContactPhone>
            <nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>MARK PORTER</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>38th Floor</ns2:street2>
                    <ns2:city>New York</ns2:city>
                    <ns2:stateOrCountry>NY</ns2:stateOrCountry>
                    <ns2:zipCode>10004</ns2:zipCode>
                </address>
            </brokerOrMarketmakerDetails>
            <noOfUnitsSold>2419</noOfUnitsSold>
            <aggregateMarketValue>1003664.87</aggregateMarketValue>
            <noOfUnitsOutstanding>70581376</noOfUnitsOutstanding>
            <approxSaleDate>07/20/2023</approxSaleDate>
            <securitiesExchangeName>NASDAQ</securitiesExchangeName>
        </securitiesInformation>
        <securitiesToBeSold>
            <securitiesClassTitle>Common</securitiesClassTitle>
            <acquiredDate>04/01/2022</acquiredDate>
            <natureOfAcquisitionTransaction>Employee stock unit award(s)</natureOfAcquisitionTransaction>
            <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
            <isGiftTransaction>N</isGiftTransaction>
            <amountOfSecuritiesAcquired>250</amountOfSecuritiesAcquired>
            <paymentDate>04/01/2022</paymentDate>
            <natureOfPayment>Not Applicable</natureOfPayment>
        </securitiesToBeSold>
        <securitiesToBeSold>
            <securitiesClassTitle>Common</securitiesClassTitle>
            <acquiredDate>01/01/2022</acquiredDate>
            <natureOfAcquisitionTransaction>Employee stock unit award(s)</natureOfAcquisitionTransaction>
            <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
            <isGiftTransaction>N</isGiftTransaction>
            <amountOfSecuritiesAcquired>250</amountOfSecuritiesAcquired>
            <paymentDate>01/01/2022</paymentDate>
            <natureOfPayment>Not Applicable</natureOfPayment>
        </securitiesToBeSold>
        <securitiesToBeSold>
            <securitiesClassTitle>Common</securitiesClassTitle>
            <acquiredDate>12/15/2021</acquiredDate>
            <natureOfAcquisitionTransaction>Employee stock unit award(s)</natureOfAcquisitionTransaction>
            <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
            <isGiftTransaction>N</isGiftTransaction>
            <amountOfSecuritiesAcquired>59</amountOfSecuritiesAcquired>
            <paymentDate>12/15/2021</paymentDate>
            <natureOfPayment>Not Applicable</natureOfPayment>
        </securitiesToBeSold>
        <securitiesToBeSold>
            <securitiesClassTitle>Common</securitiesClassTitle>
            <acquiredDate>10/01/2021</acquiredDate>
            <natureOfAcquisitionTransaction>Employee stock unit award(s)</natureOfAcquisitionTransaction>
            <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
            <isGiftTransaction>N</isGiftTransaction>
            <amountOfSecuritiesAcquired>250</amountOfSecuritiesAcquired>
            <paymentDate>10/01/2021</paymentDate>
            <natureOfPayment>Not Applicable</natureOfPayment>
        </securitiesToBeSold>
        <securitiesToBeSold>
            <securitiesClassTitle>Common</securitiesClassTitle>
            <acquiredDate>10/01/2021</acquiredDate>
            <natureOfAcquisitionTransaction>Employee stock unit award(s)</natureOfAcquisitionTransaction>
            <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
            <isGiftTransaction>N</isGiftTransaction>
            <amountOfSecuritiesAcquired>197</amountOfSecuritiesAcquired>
            <paymentDate>10/01/2021</paymentDate>
            <natureOfPayment>Not Applicable</natureOfPayment>
        </securitiesToBeSold>
        <securitiesToBeSold>
            <securitiesClassTitle>Common</securitiesClassTitle>
            <acquiredDate>04/01/2022</acquiredDate>
            <natureOfAcquisitionTransaction>Employee stock unit award(s)</natureOfAcquisitionTransaction>
            <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
            <isGiftTransaction>N</isGiftTransaction>
            <amountOfSecuritiesAcquired>468</amountOfSecuritiesAcquired>
            <paymentDate>04/01/2022</paymentDate>
            <natureOfPayment>Not Applicable</natureOfPayment>
        </securitiesToBeSold>
        <securitiesToBeSold>
            <securitiesClassTitle>Common</securitiesClassTitle>
            <acquiredDate>07/01/2022</acquiredDate>
            <natureOfAcquisitionTransaction>Employee stock unit award(s)</natureOfAcquisitionTransaction>
            <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
            <isGiftTransaction>N</isGiftTransaction>
            <amountOfSecuritiesAcquired>250</amountOfSecuritiesAcquired>
            <paymentDate>07/01/2022</paymentDate>
            <natureOfPayment>Not Applicable</natureOfPayment>
        </securitiesToBeSold>
        <securitiesToBeSold>
            <securitiesClassTitle>Common</securitiesClassTitle>
            <acquiredDate>07/01/2021</acquiredDate>
            <natureOfAcquisitionTransaction>Employee stock unit award(s)</natureOfAcquisitionTransaction>
            <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
            <isGiftTransaction>N</isGiftTransaction>
            <amountOfSecuritiesAcquired>250</amountOfSecuritiesAcquired>
            <paymentDate>07/01/2021</paymentDate>
            <natureOfPayment>Not Applicable</natureOfPayment>
        </securitiesToBeSold>
        <securitiesToBeSold>
            <securitiesClassTitle>Common</securitiesClassTitle>
            <acquiredDate>06/15/2021</acquiredDate>
            <natureOfAcquisitionTransaction>Employee stock unit award(s)</natureOfAcquisitionTransaction>
            <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
            <isGiftTransaction>N</isGiftTransaction>
            <amountOfSecuritiesAcquired>85</amountOfSecuritiesAcquired>
            <paymentDate>06/15/2021</paymentDate>
            <natureOfPayment>Not Applicable</natureOfPayment>
        </securitiesToBeSold>
        <securitiesToBeSold>
            <securitiesClassTitle>Common</securitiesClassTitle>
            <acquiredDate>07/19/2020</acquiredDate>
            <natureOfAcquisitionTransaction>Employee stock unit award(s)</natureOfAcquisitionTransaction>
            <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
            <isGiftTransaction>N</isGiftTransaction>
            <amountOfSecuritiesAcquired>308</amountOfSecuritiesAcquired>
            <paymentDate>07/19/2020</paymentDate>
            <natureOfPayment>Not Applicable</natureOfPayment>
        </securitiesToBeSold>
        <securitiesToBeSold>
            <securitiesClassTitle>Common</securitiesClassTitle>
            <acquiredDate>06/15/2022</acquiredDate>
            <natureOfAcquisitionTransaction>Employee stock unit award(s)</natureOfAcquisitionTransaction>
            <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
            <isGiftTransaction>N</isGiftTransaction>
            <amountOfSecuritiesAcquired>52</amountOfSecuritiesAcquired>
            <paymentDate>06/15/2022</paymentDate>
            <natureOfPayment>Not Applicable</natureOfPayment>
        </securitiesToBeSold>
        <nothingToReportFlagOnSecuritiesSoldInPast3Months>N</nothingToReportFlagOnSecuritiesSoldInPast3Months>
        <securitiesSoldInPast3Months>
            <sellerDetails>
                <name>Mark Porter</name>
                <address>
                    <ns2:street1>1633 Broadway, 38th floor</ns2:street1>
                    <ns2:city>New York</ns2:city>
                    <ns2:stateOrCountry>NY</ns2:stateOrCountry>
                    <ns2:zipCode>10019</ns2:zipCode>
                </address>
            </sellerDetails>
            <securitiesClassTitle>Common</securitiesClassTitle>
            <saleDate>07/06/2023</saleDate>
            <amountOfSecuritiesSold>528</amountOfSecuritiesSold>
            <grossProceeds>210077.00</grossProceeds>
        </securitiesSoldInPast3Months>
        <securitiesSoldInPast3Months>
            <sellerDetails>
                <name>Mark Porter</name>
                <address>
                    <ns2:street1>1633 Broadway, 38th floor</ns2:street1>
                    <ns2:city>New York</ns2:city>
                    <ns2:stateOrCountry>NY</ns2:stateOrCountry>
                    <ns2:zipCode>10019</ns2:zipCode>
                </address>
            </sellerDetails>
            <securitiesClassTitle>Common</securitiesClassTitle>
            <saleDate>07/05/2023</saleDate>
            <amountOfSecuritiesSold>350</amountOfSecuritiesSold>
            <grossProceeds>142141.00</grossProceeds>
        </securitiesSoldInPast3Months>
        <securitiesSoldInPast3Months>
            <sellerDetails>
                <name>Mark Porter</name>
                <address>
                    <ns2:street1>1633 Broadway, 38th floor</ns2:street1>
                    <ns2:city>New York</ns2:city>
                    <ns2:stateOrCountry>NY</ns2:stateOrCountry>
                    <ns2:zipCode>10019</ns2:zipCode>
                </address>
            </sellerDetails>
            <securitiesClassTitle>Common</securitiesClassTitle>
            <saleDate>07/03/2023</saleDate>
            <amountOfSecuritiesSold>2734</amountOfSecuritiesSold>
            <grossProceeds>1127305.00</grossProceeds>
        </securitiesSoldInPast3Months>
        <securitiesSoldInPast3Months>
            <sellerDetails>
                <name>Mark Porter</name>
                <address>
                    <ns2:street1>1633 Broadway, 38th floor</ns2:street1>
                    <ns2:city>New York</ns2:city>
                    <ns2:stateOrCountry>NY</ns2:stateOrCountry>
                    <ns2:zipCode>10019</ns2:zipCode>
                </address>
            </sellerDetails>
            <securitiesClassTitle>Common</securitiesClassTitle>
            <saleDate>06/02/2023</saleDate>
            <amountOfSecuritiesSold>2669</amountOfSecuritiesSold>
            <grossProceeds>1017209.00</grossProceeds>
        </securitiesSoldInPast3Months>
        <securitiesSoldInPast3Months>
            <sellerDetails>
                <name>Mark Porter</name>
                <address>
                    <ns2:street1>1633 Broadway, 38th floor</ns2:street1>
                    <ns2:city>New York</ns2:city>
                    <ns2:stateOrCountry>NY</ns2:stateOrCountry>
                    <ns2:zipCode>10019</ns2:zipCode>
                </address>
            </sellerDetails>
            <securitiesClassTitle>Common</securitiesClassTitle>
            <saleDate>05/09/2023</saleDate>
            <amountOfSecuritiesSold>2673</amountOfSecuritiesSold>
            <grossProceeds>668250.00</grossProceeds>
        </securitiesSoldInPast3Months>
        <noticeSignature>
            <noticeDate>07/20/2023</noticeDate>
            <planAdoptionDates/>
            <signature>/s/ Mark Porter</signature>
        </noticeSignature>
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144
0001801141
XXXXXXXX
LIVE
0001441816
MONGODB, INC.
001-38240
1633 Broadway, 38th floor
New York
NY
10019
646-727-4092
MARK PORTER
Officer
Common
Morgan Stanley Smith Barney LLC Executive Financial Services
1 New York Plaza
38th Floor
New York
NY
10004
2419
1003664.87
70581376
07/20/2023
NASDAQ
Common
04/01/2022
Employee stock unit award(s)
Issuer
N
250
04/01/2022
Not Applicable
Common
01/01/2022
Employee stock unit award(s)
Issuer
N
250
01/01/2022
Not Applicable
Common
12/15/2021
Employee stock unit award(s)
Issuer
N
59
12/15/2021
Not Applicable
Common
10/01/2021
Employee stock unit award(s)
Issuer
N
250
10/01/2021
Not Applicable
Common
10/01/2021
Employee stock unit award(s)
Issuer
N
197
10/01/2021
Not Applicable
Common
04/01/2022
Employee stock unit award(s)
Issuer
N
468
04/01/2022
Not Applicable
Common
07/01/2022
Employee stock unit award(s)
Issuer
N
250
07/01/2022
Not Applicable
Common
07/01/2021
Employee stock unit award(s)
Issuer
N
250
07/01/2021
Not Applicable
Common
06/15/2021
Employee stock unit award(s)
Issuer
N
85
06/15/2021
Not Applicable
Common
07/19/2020
Employee stock unit award(s)
Issuer
N
308
07/19/2020
Not Applicable
Common
06/15/2022
Employee stock unit award(s)
Issuer
N
52
06/15/2022
Not Applicable
N
Mark Porter
1633 Broadway, 38th floor
New York
NY
10019
Common
07/06/2023
528
210077.00
Mark Porter
1633 Broadway, 38th floor
New York
NY
10019
Common
07/05/2023
350
142141.00
Mark Porter
1633 Broadway, 38th floor
New York
NY
10019
Common
07/03/2023
2734
1127305.00
Mark Porter
1633 Broadway, 38th floor
New York
NY
10019
Common
06/02/2023
2669
1017209.00
Mark Porter
1633 Broadway, 38th floor
New York
NY
10019
Common
05/09/2023
2673
668250.00
07/20/2023
/s/ Mark Porter