    <SEC-DOCUMENT>0000807863-23-000056-index.html : 20230810
    <SEC-HEADER>0000807863-23-000056.hdr.sgml : 20230810
    <ACCEPTANCE-DATETIME>20230810170948
    ACCESSION NUMBER:		0000807863-23-000056
    CONFORMED SUBMISSION TYPE:	PRE 14A
    PUBLIC DOCUMENT COUNT:		4
    CONFORMED PERIOD OF REPORT:	20220930
    FILED AS OF DATE:		20230810
    DATE AS OF CHANGE:		20230810

    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:		PRE 14A
    		SEC ACT:		1934 Act
    		SEC FILE NUMBER:	001-35231
    		FILM NUMBER:		231160585

    	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>PRE 14A
    <SEQUENCE>1
    <FILENAME>mitk-20230810xpre_14a.htm
    <DESCRIPTION>PRE 14A
    <TEXT>
    Document 1 - file: mitk-20230810xpre_14a.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>2
    <FILENAME>carnecchia_signature1.jpg
    <TEXT>
    Document 2 - file: carnecchia_signature1.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>3
    <FILENAME>mitk-pcxv2_pagex1.jpg
    <TEXT>
    Document 3 - file: mitk-pcxv2_pagex1.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>4
    <FILENAME>mitk-pcxv3_pagex2.jpg
    <TEXT>
    Document 4 - file: mitk-pcxv3_pagex2.jpg

    </DOCUMENT>
    </SEC-DOCUMENT>