    <SEC-DOCUMENT>0000807863-21-000008-index.html : 20210122
    <SEC-HEADER>0000807863-21-000008.hdr.sgml : 20210122
    <ACCEPTANCE-DATETIME>20210122172932
    ACCESSION NUMBER:		0000807863-21-000008
    CONFORMED SUBMISSION TYPE:	DEF 14A
    PUBLIC DOCUMENT COUNT:		5
    CONFORMED PERIOD OF REPORT:	20210122
    FILED AS OF DATE:		20210122
    DATE AS OF CHANGE:		20210122

    FILER:

    	COMPANY DATA:
    		COMPANY CONFORMED NAME:			MITEK SYSTEMS INC
    		CENTRAL INDEX KEY:			0000807863
    		STANDARD INDUSTRIAL CLASSIFICATION:	COMPUTER PERIPHERAL EQUIPMENT, NEC [3577]
    		IRS NUMBER:				870418827
    		STATE OF INCORPORATION:			DE
    		FISCAL YEAR END:			0930

    	FILING VALUES:
    		FORM TYPE:		DEF 14A
    		SEC ACT:		1934 Act
    		SEC FILE NUMBER:	001-35231
    		FILM NUMBER:		21547209

    	BUSINESS ADDRESS:
    		STREET 1:		600 B STREET
    		STREET 2:		SUITE 100
    		CITY:			SAN DIEGO
    		STATE:			CA
    		ZIP:			92101
    		BUSINESS PHONE:		619-269-6800

    	MAIL ADDRESS:
    		STREET 1:		600 B STREET
    		STREET 2:		SUITE 100
    		CITY:			SAN DIEGO
    		STATE:			CA
    		ZIP:			92101
    </SEC-HEADER>
    <DOCUMENT>
    <TYPE>DEF 14A
    <SEQUENCE>1
    <FILENAME>mitk-20210122xdef_14a.htm
    <DESCRIPTION>DEF 14A
    <TEXT>
    Document 1 - file: mitk-20210122xdef_14a.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>2
    <FILENAME>carnecchia_signature11.jpg
    <TEXT>
    Document 2 - file: carnecchia_signature11.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>3
    <FILENAME>screenshot2021-01x15at6580.jpg
    <TEXT>
    Document 3 - file: screenshot2021-01x15at6580.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>4
    <FILENAME>screenshot2021-01x15at7071.jpg
    <TEXT>
    Document 4 - file: screenshot2021-01x15at7071.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>5
    <FILENAME>screenshot2021-01x15at7090.jpg
    <TEXT>
    Document 5 - file: screenshot2021-01x15at7090.jpg

    </DOCUMENT>
    </SEC-DOCUMENT>