<?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>0001590840</cik>
                    <ccc>XXXXXXXX</ccc>
                </filerCredentials>
            </filer>
            <liveTestFlag>LIVE</liveTestFlag>



        </filerInfo>
    </headerData>
    <formData>
        <issuerInfo>
            <issuerCik>0000807863</issuerCik>
            <issuerName>MITEK SYSTEMS INC</issuerName>
            <secFileNumber>001-35231</secFileNumber>
            <issuerAddress>
                <ns2:street1>770 First Avenue, Suite 425</ns2:street1>
                <ns2:city>San Diego</ns2:city>
                <ns2:stateOrCountry>CA</ns2:stateOrCountry>
                <ns2:zipCode>92101</ns2:zipCode>
            </issuerAddress>
            <issuerContactPhone>619-269-6800</issuerContactPhone>
            <nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>MICHAEL E DIAMOND</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>70352</noOfUnitsSold>
            <aggregateMarketValue>704223.52</aggregateMarketValue>
            <noOfUnitsOutstanding>45564205</noOfUnitsOutstanding>
            <approxSaleDate>06/13/2025</approxSaleDate>
            <securitiesExchangeName>NASDAQ</securitiesExchangeName>
        </securitiesInformation>
        <securitiesToBeSold>
            <securitiesClassTitle>Common</securitiesClassTitle>
            <acquiredDate>11/15/2020</acquiredDate>
            <natureOfAcquisitionTransaction>Restricted and Performance Stock Units</natureOfAcquisitionTransaction>
            <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
            <isGiftTransaction>N</isGiftTransaction>
            <amountOfSecuritiesAcquired>64528</amountOfSecuritiesAcquired>
            <paymentDate>11/15/2020</paymentDate>
            <natureOfPayment>N/A</natureOfPayment>
        </securitiesToBeSold>
        <securitiesToBeSold>
            <securitiesClassTitle>Common</securitiesClassTitle>
            <acquiredDate>02/14/2019</acquiredDate>
            <natureOfAcquisitionTransaction>Employee Stock Purchase Plan</natureOfAcquisitionTransaction>
            <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
            <isGiftTransaction>N</isGiftTransaction>
            <amountOfSecuritiesAcquired>5824</amountOfSecuritiesAcquired>
            <paymentDate>02/14/2019</paymentDate>
            <natureOfPayment>Cash</natureOfPayment>
        </securitiesToBeSold>
        <nothingToReportFlagOnSecuritiesSoldInPast3Months>Y</nothingToReportFlagOnSecuritiesSoldInPast3Months>
        <remarks>The 64,528 securities to be sold were acquired upon the vesting of restricted and performance stock units during the period of 11/15/2020 through 11/30/2023.
The 5,824 securities to be sold were acquired upon the vesting of employees stock purchase plan during the period of 02/14/2019 through 02/14/2022.
</remarks>
        <noticeSignature>
            <noticeDate>06/13/2025</noticeDate>
            <planAdoptionDates>
                <planAdoptionDate>03/14/2025</planAdoptionDate>
            </planAdoptionDates>
            <signature>/s/ Michael E Diamond</signature>
        </noticeSignature>
    </formData>
</edgarSubmission>
[{"type": "144", "sequence": "1", "filename": "primary_doc.xml", "secsgml_size_bytes": 4253}]
144
0001590840
XXXXXXXX
LIVE
0000807863
MITEK SYSTEMS INC
001-35231
770 First Avenue, Suite 425
San Diego
CA
92101
619-269-6800
MICHAEL E DIAMOND
Officer
Common
Morgan Stanley Smith Barney LLC Executive Financial Services
1 New York Plaza
8th Floor
New York
NY
10004
70352
704223.52
45564205
06/13/2025
NASDAQ
Common
11/15/2020
Restricted and Performance Stock Units
Issuer
N
64528
11/15/2020
N/A
Common
02/14/2019
Employee Stock Purchase Plan
Issuer
N
5824
02/14/2019
Cash
Y
The 64,528 securities to be sold were acquired upon the vesting of restricted and performance stock units during the period of 11/15/2020 through 11/30/2023.
The 5,824 securities to be sold were acquired upon the vesting of employees stock purchase plan during the period of 02/14/2019 through 02/14/2022.
06/13/2025
03/14/2025
/s/ Michael E Diamond