<SEC-DOCUMENT>0001562180-18-002560.txt : 20180517
<SEC-HEADER>0001562180-18-002560.hdr.sgml : 20180517
<ACCEPTANCE-DATETIME>20180517204519
ACCESSION NUMBER:		0001562180-18-002560
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		2
CONFORMED PERIOD OF REPORT:	20180517
FILED AS OF DATE:		20180517
DATE AS OF CHANGE:		20180517

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			BROWN LESLIE L
		CENTRAL INDEX KEY:			0001674693

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-10235
		FILM NUMBER:		18844834

	MAIL ADDRESS:	
		STREET 1:		867 BARKENTINE DR.
		CITY:			HOLLAND
		STATE:			MI
		ZIP:			49424

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
</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>2018-05-17</periodOfReport>

    <notSubjectToSection16>false</notSubjectToSection16>

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

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001674693</rptOwnerCik>
            <rptOwnerName>BROWN LESLIE L</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>867 BARKENTINE DR.</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>HOLLAND</rptOwnerCity>
            <rptOwnerState>MI</rptOwnerState>
            <rptOwnerZipCode>49424</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>true</isDirector>
            <isOfficer>false</isOfficer>
            <isTenPercentOwner>false</isTenPercentOwner>
            <isOther>false</isOther>
            <officerTitle></officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable></nonDerivativeTable>

    <derivativeTable>
        <derivativeTransaction>
            <securityTitle>
                <value>Non-Employee Director Stock Option Grant</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>24.21</value>
            </conversionOrExercisePrice>
            <transactionDate>
                <value>2018-05-17</value>
            </transactionDate>
            <deemedExecutionDate>
                <value>2018-05-17</value>
            </deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>false</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness></transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>7000.00</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>24.21</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <exerciseDate>
                <value>2018-11-17</value>
            </exerciseDate>
            <expirationDate>
                <value>2028-05-17</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>7000.00</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>7000.00</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeTransaction>
    </derivativeTable>

    <footnotes></footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>/s/ Robert L. Hughes for Brown Leslie L. by Power of Attorney</signatureName>
        <signatureDate>2018-05-18</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>EX-24
<SEQUENCE>2
<FILENAME>brown_poa.txt
<DESCRIPTION>LESLIE BROWN - 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 19th day of May, 2016.



Signature:	/s/ Leslie L. Brown

Print Name:	Leslie L. Brown
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
