<?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>0001674282</cik>
                    <ccc>XXXXXXXX</ccc>
                </filerCredentials>
            </filer>
            <liveTestFlag>LIVE</liveTestFlag>



        </filerInfo>
    </headerData>
    <formData>
        <issuerInfo>
            <issuerCik>0000899460</issuerCik>
            <issuerName>MANNKIND CORP.</issuerName>
            <secFileNumber>000-50865</secFileNumber>
            <issuerAddress>
                <ns2:street1>1 Casper Street</ns2:street1>
                <ns2:city>Danbury</ns2:city>
                <ns2:stateOrCountry>CT</ns2:stateOrCountry>
                <ns2:zipCode>06810</ns2:zipCode>
            </issuerAddress>
            <issuerContactPhone>(818) 661-5000</issuerContactPhone>
            <nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>MICHAEL CASTAGNA</nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>
            <relationshipsToIssuer>
                <relationshipToIssuer>Officer</relationshipToIssuer>
                <relationshipToIssuer>Director</relationshipToIssuer>
            </relationshipsToIssuer>
        </issuerInfo>
        <securitiesInformation>
            <securitiesClassTitle>Common</securitiesClassTitle>
            <brokerOrMarketmakerDetails>
                <name>E*TRADE FINANCIAL CORPORATION</name>
                <address>
                    <ns2:street1>3 EDISON DRIVE</ns2:street1>
                    <ns2:city>ALPHARETTA</ns2:city>
                    <ns2:stateOrCountry>GA</ns2:stateOrCountry>
                    <ns2:zipCode>30005</ns2:zipCode>
                </address>
            </brokerOrMarketmakerDetails>
            <noOfUnitsSold>150000</noOfUnitsSold>
            <aggregateMarketValue>702780.00</aggregateMarketValue>
            <noOfUnitsOutstanding>264305532</noOfUnitsOutstanding>
            <approxSaleDate>05/24/2023</approxSaleDate>
            <securitiesExchangeName>NASD</securitiesExchangeName>
        </securitiesInformation>
        <securitiesToBeSold>
            <securitiesClassTitle>COMMON</securitiesClassTitle>
            <acquiredDate>05/22/2023</acquiredDate>
            <natureOfAcquisitionTransaction>Performance Shares</natureOfAcquisitionTransaction>
            <nameOfPersonfromWhomAcquired>ISSUER</nameOfPersonfromWhomAcquired>
            <isGiftTransaction>N</isGiftTransaction>
            <amountOfSecuritiesAcquired>150000</amountOfSecuritiesAcquired>
            <paymentDate>05/22/2023</paymentDate>
            <natureOfPayment>Not Applicable</natureOfPayment>
        </securitiesToBeSold>
        <nothingToReportFlagOnSecuritiesSoldInPast3Months>N</nothingToReportFlagOnSecuritiesSoldInPast3Months>
        <securitiesSoldInPast3Months>
            <sellerDetails>
                <name>MICHAEL CASTAGNA</name>
                <address>
                    <ns2:street1>1 Casper Street</ns2:street1>
                    <ns2:city>Danbury</ns2:city>
                    <ns2:stateOrCountry>CT</ns2:stateOrCountry>
                    <ns2:zipCode>06810</ns2:zipCode>
                </address>
            </sellerDetails>
            <securitiesClassTitle>Common</securitiesClassTitle>
            <saleDate>05/05/2023</saleDate>
            <amountOfSecuritiesSold>10000</amountOfSecuritiesSold>
            <grossProceeds>39600.00</grossProceeds>
        </securitiesSoldInPast3Months>
        <securitiesSoldInPast3Months>
            <sellerDetails>
                <name>MICHAEL CASTAGNA</name>
                <address>
                    <ns2:street1>1 Casper Street</ns2:street1>
                    <ns2:city>Danbury</ns2:city>
                    <ns2:stateOrCountry>CT</ns2:stateOrCountry>
                    <ns2:zipCode>06810</ns2:zipCode>
                </address>
            </sellerDetails>
            <securitiesClassTitle>Common</securitiesClassTitle>
            <saleDate>04/03/2023</saleDate>
            <amountOfSecuritiesSold>10000</amountOfSecuritiesSold>
            <grossProceeds>41286.00</grossProceeds>
        </securitiesSoldInPast3Months>
        <securitiesSoldInPast3Months>
            <sellerDetails>
                <name>MICHAEL CASTAGNA</name>
                <address>
                    <ns2:street1>1 Casper Street</ns2:street1>
                    <ns2:city>Danbury</ns2:city>
                    <ns2:stateOrCountry>CT</ns2:stateOrCountry>
                    <ns2:zipCode>06810</ns2:zipCode>
                </address>
            </sellerDetails>
            <securitiesClassTitle>Common</securitiesClassTitle>
            <saleDate>03/01/2023</saleDate>
            <amountOfSecuritiesSold>10000</amountOfSecuritiesSold>
            <grossProceeds>52748.00</grossProceeds>
        </securitiesSoldInPast3Months>
        <noticeSignature>
            <noticeDate>05/24/2023</noticeDate>
            <planAdoptionDates>
                <planAdoptionDate>12/05/2022</planAdoptionDate>
            </planAdoptionDates>
            <signature>/s/ Michael Edward Castagna</signature>
        </noticeSignature>
    </formData>
</edgarSubmission>
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144
0001674282
XXXXXXXX
LIVE
0000899460
MANNKIND CORP.
000-50865
1 Casper Street
Danbury
CT
06810
(818) 661-5000
MICHAEL CASTAGNA
Officer
Director
Common
E*TRADE FINANCIAL CORPORATION
3 EDISON DRIVE
ALPHARETTA
GA
30005
150000
702780.00
264305532
05/24/2023
NASD
COMMON
05/22/2023
Performance Shares
ISSUER
N
150000
05/22/2023
Not Applicable
N
MICHAEL CASTAGNA
1 Casper Street
Danbury
CT
06810
Common
05/05/2023
10000
39600.00
MICHAEL CASTAGNA
1 Casper Street
Danbury
CT
06810
Common
04/03/2023
10000
41286.00
MICHAEL CASTAGNA
1 Casper Street
Danbury
CT
06810
Common
03/01/2023
10000
52748.00
05/24/2023
12/05/2022
/s/ Michael Edward Castagna