<?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>0001309702</cik>
                    <ccc>XXXXXXXX</ccc>
                </filerCredentials>
            </filer>
            <liveTestFlag>LIVE</liveTestFlag>



        </filerInfo>
    </headerData>
    <formData>
        <issuerInfo>
            <issuerCik>0001787400</issuerCik>
            <issuerName>NKARTA INC</issuerName>
            <secFileNumber>001-39370</secFileNumber>
            <issuerAddress>
                <ns2:street1>1150 Veterans Boulevard</ns2:street1>
                <ns2:city>South San Francisco</ns2:city>
                <ns2:stateOrCountry>CA</ns2:stateOrCountry>
                <ns2:zipCode>94080</ns2:zipCode>
            </issuerAddress>
            <issuerContactPhone>4155824923</issuerContactPhone>
            <nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>PAUL J HASTINGS</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>60000</noOfUnitsSold>
            <aggregateMarketValue>770400.00</aggregateMarketValue>
            <noOfUnitsOutstanding>49072342</noOfUnitsOutstanding>
            <approxSaleDate>03/04/2024</approxSaleDate>
            <securitiesExchangeName>NASDAQ</securitiesExchangeName>
        </securitiesInformation>
        <securitiesToBeSold>
            <securitiesClassTitle>Common</securitiesClassTitle>
            <acquiredDate>12/24/2018</acquiredDate>
            <natureOfAcquisitionTransaction>Previously Exercised Options</natureOfAcquisitionTransaction>
            <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
            <isGiftTransaction>N</isGiftTransaction>
            <amountOfSecuritiesAcquired>60000</amountOfSecuritiesAcquired>
            <paymentDate>12/24/2018</paymentDate>
            <natureOfPayment>Cash</natureOfPayment>
        </securitiesToBeSold>
        <nothingToReportFlagOnSecuritiesSoldInPast3Months>N</nothingToReportFlagOnSecuritiesSoldInPast3Months>
        <securitiesSoldInPast3Months>
            <sellerDetails>
                <name>10b5-1 Sales Plan for PAUL J HASTINGS</name>
                <address>
                    <ns2:street1>1150 Veterans Boulevard</ns2:street1>
                    <ns2:city>South San Francisco</ns2:city>
                    <ns2:stateOrCountry>CA</ns2:stateOrCountry>
                    <ns2:zipCode>94080</ns2:zipCode>
                </address>
            </sellerDetails>
            <securitiesClassTitle>COMMON</securitiesClassTitle>
            <saleDate>03/01/2024</saleDate>
            <amountOfSecuritiesSold>12358</amountOfSecuritiesSold>
            <grossProceeds>160671.12</grossProceeds>
        </securitiesSoldInPast3Months>
        <noticeSignature>
            <noticeDate>03/04/2024</noticeDate>
            <planAdoptionDates>
                <planAdoptionDate>06/27/2022</planAdoptionDate>
            </planAdoptionDates>
            <signature>/s/ Paul J Hastings</signature>
        </noticeSignature>
    </formData>
</edgarSubmission>
[{"type": "144", "sequence": "1", "filename": "primary_doc.xml", "secsgml_size_bytes": 4044}]
144
0001309702
XXXXXXXX
LIVE
0001787400
NKARTA INC
001-39370
1150 Veterans Boulevard
South San Francisco
CA
94080
4155824923
PAUL J HASTINGS
Officer
COMMON
Morgan Stanley Smith Barney LLC Executive Financial Services
1 New York Plaza
8th Floor
New York
NY
10004
60000
770400.00
49072342
03/04/2024
NASDAQ
Common
12/24/2018
Previously Exercised Options
Issuer
N
60000
12/24/2018
Cash
N
10b5-1 Sales Plan for PAUL J HASTINGS
1150 Veterans Boulevard
South San Francisco
CA
94080
COMMON
03/01/2024
12358
160671.12
03/04/2024
06/27/2022
/s/ Paul J Hastings