-----BEGIN PRIVACY-ENHANCED MESSAGE-----
Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
Originator-Key-Asymmetric:
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 TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB
MIC-Info: RSA-MD5,RSA,
 Qh80/a4ypKjyk3O5Ok/v6bA+HiMDhyQX8dK065b9eGgtU+YcS86PM03zRRvR6yPx
 MjsqxFHtm8Oq3eJG5BWL5A==

<SEC-DOCUMENT>0001209191-03-022520.txt : 20030923
<SEC-HEADER>0001209191-03-022520.hdr.sgml : 20030923
<ACCEPTANCE-DATETIME>20030923113626
ACCESSION NUMBER:		0001209191-03-022520
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20030919
FILED AS OF DATE:		20030923

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			MERCANTILE BANK CORP
		CENTRAL INDEX KEY:			0001042729
		STANDARD INDUSTRIAL CLASSIFICATION:	STATE COMMERCIAL BANKS [6022]
		IRS NUMBER:				383360865
		STATE OF INCORPORATION:			MI
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		5650 BYRON CENTER AVENUE S. W.
		CITY:			WYOMING
		STATE:			MI
		ZIP:			49509
		BUSINESS PHONE:		616 406-3777

	MAIL ADDRESS:	
		STREET 1:		5650 BYRON CENTER AVENUE S. W.
		CITY:			WYOMING
		STATE:			MI
		ZIP:			49509

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			HECHT DAVID M
		CENTRAL INDEX KEY:			0001208516

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-26719
		FILM NUMBER:		03905374

	BUSINESS ADDRESS:	
		STREET 1:		DICKENSON WRIGHT PLLC
		STREET 2:		500 WOODWARD, #4000
		CITY:			DETROIT
		STATE:			MI
		ZIP:			48226
		BUSINESS PHONE:		616-975-7746

	MAIL ADDRESS:	
		STREET 1:		RDV CORP
		STREET 2:		126 OTTAWA AVENUE, SUITE 500
		CITY:			GRAND RAPIDS
		STATE:			MI
		ZIP:			49503
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>doc4.xml
<DESCRIPTION>FORM 4 SUBMISSION
<TEXT>
<XML>
<?xml version="1.0"?><ownershipDocument>
    <schemaVersion>X0201</schemaVersion>

    <documentType>4</documentType><periodOfReport>2003-09-19</periodOfReport><notSubjectToSection16>0</notSubjectToSection16>
    <issuer>
        <issuerCik>0001042729</issuerCik>
        <issuerName>MERCANTILE BANK CORP</issuerName>
        <issuerTradingSymbol>MBWM</issuerTradingSymbol></issuer><reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001208516</rptOwnerCik>
            <rptOwnerName>HECHT DAVID M</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>126 OTTAWA AVENUE, N.W.</rptOwnerStreet1>
            <rptOwnerStreet2>SUITE 500</rptOwnerStreet2>
            <rptOwnerCity>GRAND RAPIDS</rptOwnerCity>
            <rptOwnerState>MI</rptOwnerState>
            <rptOwnerZipCode>49503</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
            <reportingOwnerRelationship>
<isDirector>1</isDirector><isOfficer>0</isOfficer><isTenPercentOwner>0</isTenPercentOwner><isOther>0</isOther></reportingOwnerRelationship></reportingOwner><nonDerivativeTable><nonDerivativeTransaction><securityTitle><value>Common Stock</value></securityTitle><transactionDate><value>2003-09-19</value></transactionDate><deemedExecutionDate></deemedExecutionDate><transactionCoding><transactionFormType>4</transactionFormType><transactionCode>P</transactionCode><equitySwapInvolved>0</equitySwapInvolved></transactionCoding><transactionTimeliness><value></value></transactionTimeliness><transactionAmounts><transactionShares><value>30000</value></transactionShares><transactionPricePerShare><value>33.26</value></transactionPricePerShare><transactionAcquiredDisposedCode><value>A</value></transactionAcquiredDisposedCode></transactionAmounts><postTransactionAmounts><sharesOwnedFollowingTransaction><value>88018.301</value><footnoteId id="F1" /><footnoteId id="F2" /><footnoteId id="F3" /></sharesOwnedFollowingTransaction>
</postTransactionAmounts><ownershipNature><directOrIndirectOwnership><value>D</value></directOrIndirectOwnership></ownershipNature></nonDerivativeTransaction></nonDerivativeTable><footnotes><footnote id="F1">Includes shares issued pursuant to 5% stock dividends paid to all shareholders in February of 2001, 2002 and 2003. </footnote><footnote id="F2">Does not include 11,576 shares that Mr. Hecht has sole voting and investment power over as President of the Charles W. Loosemore Foundation, which is the record and beneficial owner of the shares.  Mr. Hecht disclaims beneficial ownership of these 11,576 shares.</footnote><footnote id="F3">Includes 137.301 shares acquired on 9/10/2003 by reinvesting dividends under the issuer's dividend reinvestment plan.</footnote></footnotes><remarks></remarks><ownerSignature><signatureName>Jerome M. Schwartz
Attorney-in-fact</signatureName><signatureDate>2003-09-23</signatureDate></ownerSignature></ownershipDocument>

</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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