<SEC-DOCUMENT>0001562180-17-001539.txt : 20170425
<SEC-HEADER>0001562180-17-001539.hdr.sgml : 20170425
<ACCEPTANCE-DATETIME>20170425083501
ACCESSION NUMBER:		0001562180-17-001539
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		2
CONFORMED PERIOD OF REPORT:	20170424
FILED AS OF DATE:		20170425
DATE AS OF CHANGE:		20170425

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			GENTEX CORP
		CENTRAL INDEX KEY:			0000355811
		STANDARD INDUSTRIAL CLASSIFICATION:	MOTOR VEHICLE PARTS & ACCESSORIES [3714]
		IRS NUMBER:				382030505
		STATE OF INCORPORATION:			MI
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		600 N CENTENNIAL ST
		CITY:			ZEELAND
		STATE:			MI
		ZIP:			49464
		BUSINESS PHONE:		6167721800

	MAIL ADDRESS:	
		STREET 1:		600 N CENTENNIAL STREET
		CITY:			ZEELAND
		STATE:			MI
		ZIP:			49464

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Ryan Scott P
		CENTRAL INDEX KEY:			0001651517

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-10235
		FILM NUMBER:		17779804

	MAIL ADDRESS:	
		STREET 1:		7592 KIRKWOOD TRAIL SE
		CITY:			ALTO
		STATE:			MI
		ZIP:			49302
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>primarydocument.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0306</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2017-04-24</periodOfReport>

    <notSubjectToSection16>false</notSubjectToSection16>

    <issuer>
        <issuerCik>0000355811</issuerCik>
        <issuerName>GENTEX CORP</issuerName>
        <issuerTradingSymbol>GNTX</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001651517</rptOwnerCik>
            <rptOwnerName>Ryan Scott P</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>7592 KIRKWOOD TRAIL SE</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>ALTO</rptOwnerCity>
            <rptOwnerState>MI</rptOwnerState>
            <rptOwnerZipCode>49302</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>false</isDirector>
            <isOfficer>true</isOfficer>
            <isTenPercentOwner>false</isTenPercentOwner>
            <isOther>false</isOther>
            <officerTitle>General Counsel</officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2017-04-24</value>
            </transactionDate>
            <deemedExecutionDate>
                <value>2017-04-24</value>
            </deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>M</transactionCode>
                <equitySwapInvolved>false</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness></transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>4920.00</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>9.375</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>18585.00</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2017-04-24</value>
            </transactionDate>
            <deemedExecutionDate>
                <value>2017-04-24</value>
            </deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>S</transactionCode>
                <equitySwapInvolved>false</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness></transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>4920.00</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>20.3779</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>13665.00</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <derivativeTable>
        <derivativeTransaction>
            <securityTitle>
                <value>Employee Stock Option (Right to buy)</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>9.375</value>
            </conversionOrExercisePrice>
            <transactionDate>
                <value>2017-04-24</value>
            </transactionDate>
            <deemedExecutionDate>
                <value>2017-04-24</value>
            </deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>M</transactionCode>
                <equitySwapInvolved>false</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness></transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>4920.00</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>9.375</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <exerciseDate>
                <value>2016-12-27</value>
            </exerciseDate>
            <expirationDate>
                <value>2017-12-27</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>4920.00</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>0.00</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeTransaction>
    </derivativeTable>

    <footnotes></footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>/s/ Robert L. Hughes for Ryan Scott P by Power of Attorney</signatureName>
        <signatureDate>2017-04-26</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>EX-24
<SEQUENCE>2
<FILENAME>ryan_poa.txt
<DESCRIPTION>SCOTT RYAN - POA
<TEXT>
LIMITED POWER OF ATTORNEY FOR SECTION 16 REPORTING OBLIGATIONS


Know all by these presents, that the undersigned hereby constitutes and
appoints each of Kevin Nash, any successor Chief Accounting Officer of
Gentex Corporation (the "Corporation"), and Robert Hughes, any successor
Director of Finance & Tax of the Corporation, and any of their respective
designees, signing singly, the undersigned's true and lawful
attorney-in-fact to:

(1)	execute for and on behalf of the undersigned, in the undersigned's
 capacity as an officer and/or director of the Corporation, Forms 3, 4,
 and 5 in accordance with Section 16(a) of the Securities Exchange Act
 of 1934 and the rules thereunder;

(2)	do and perform any and all acts for and on behalf of the undersigned
 that may be necessary or desirable to complete and execute any such Form
 3, 4, or 5, complete and execute any amendment or amendments thereto,
 and timely file such form with the United States Securities and Exchange
 Commission and any stock exchange or similar authority; and

(3)	take any other action of any type whatsoever in connection with the
 foregoing that, in the opinion of such attorney-in-fact, may be of
 benefit to, in the best interest of, or legally required by, the
 undersigned, it being understood that the documents executed by such
 attorney-in-fact on behalf of the undersigned pursuant to this Power
 of Attorney shall be in such form and shall contain such terms and
 conditions as such attorney-in-fact may approve in such
 attorney-in-fact's discretion.

The undersigned hereby grants to each such attorney-in-fact full power
and authority to do and perform any and every act and thing whatsoever
requisite, necessary, or proper to be done in the exercise of any of the
rights and powers herein granted, as fully to all intents and purposes as
the undersigned might or could do if personally present, with full power
of substitution or revocation, hereby ratifying and confirming all that
such attorney-in-fact, or such attorney-in-fact's substitute or
substitutes, shall lawfully do or cause to be done by virtue of this Power
of Attorney and the rights and powers herein granted.

The undersigned acknowledges that the foregoing attorneys-in-fact, in
serving in such capacity at the request of the undersigned, are not
assuming, nor is the Corporation assuming, any of the undersigned's
responsibilities to comply with Section 16 or any other provision of
the Securities Exchange Act of 1934.

This Power of Attorney shall remain in full force and effect until the
undersigned is no longer required to file Forms 3, 4, and 5 with respect
to the undersigned's holdings of and transactions in securities issued by
the Corporation, unless earlier revoked by the undersigned in a signed
writing delivered to the foregoing attorneys-in-fact.

IN WITNESS WHEREOF, the undersigned has caused this Power of Attorney to be
executed as of this 20th day of August, 2015.



Signature:	    /s/ Scott P. Ryan

Print Name:	    Scott P. Ryan
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
