    <SEC-DOCUMENT>0001437749-21-008527-index.html : 20210408
    <SEC-HEADER>0001437749-21-008527.hdr.sgml : 20210408
    <ACCEPTANCE-DATETIME>20210408103055
    ACCESSION NUMBER:		0001437749-21-008527
    CONFORMED SUBMISSION TYPE:	DEF 14A
    PUBLIC DOCUMENT COUNT:		17
    CONFORMED PERIOD OF REPORT:	20210527
    FILED AS OF DATE:		20210408
    DATE AS OF CHANGE:		20210408

    FILER:

    	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

    	FILING VALUES:
    		FORM TYPE:		DEF 14A
    		SEC ACT:		1934 Act
    		SEC FILE NUMBER:	000-26719
    		FILM NUMBER:		21814070

    	BUSINESS ADDRESS:
    		STREET 1:		310 LEONARD STREET NW
    		CITY:			GRAND RAPIDS
    		STATE:			MI
    		ZIP:			49504
    		BUSINESS PHONE:		616 406-3000

    	MAIL ADDRESS:
    		STREET 1:		310 LEONARD STREET NW
    		CITY:			GRAND RAPIDS
    		STATE:			MI
    		ZIP:			49504
    </SEC-HEADER>
    <DOCUMENT>
    <TYPE>DEF 14A
    <SEQUENCE>1
    <FILENAME>mbwm20210325_def14a.htm
    <DESCRIPTION>FORM DEF 14A
    <TEXT>
    Document 1 - file: mbwm20210325_def14a.htm

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    <SEQUENCE>2
    <FILENAME>bluecgray.jpg
    <TEXT>
    Document 2 - file: bluecgray.jpg

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    <SEQUENCE>3
    <FILENAME>computer.jpg
    <TEXT>
    Document 3 - file: computer.jpg

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    <TYPE>GRAPHIC
    <SEQUENCE>4
    <FILENAME>cwhite.jpg
    <TEXT>
    Document 4 - file: cwhite.jpg

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    <TYPE>GRAPHIC
    <SEQUENCE>5
    <FILENAME>mail.jpg
    <TEXT>
    Document 5 - file: mail.jpg

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    <TYPE>GRAPHIC
    <SEQUENCE>6
    <FILENAME>mbwm20210325_def14aimg002.jpg
    <TEXT>
    Document 6 - file: mbwm20210325_def14aimg002.jpg

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    <TYPE>GRAPHIC
    <SEQUENCE>7
    <FILENAME>merclogo.jpg
    <TEXT>
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    <SEQUENCE>8
    <FILENAME>merclogosml.jpg
    <TEXT>
    Document 8 - file: merclogosml.jpg

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    <TYPE>GRAPHIC
    <SEQUENCE>9
    <FILENAME>mgray.jpg
    <TEXT>
    Document 9 - file: mgray.jpg

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    <TYPE>GRAPHIC
    <SEQUENCE>10
    <FILENAME>mwhite.jpg
    <TEXT>
    Document 10 - file: mwhite.jpg

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    <TYPE>GRAPHIC
    <SEQUENCE>11
    <FILENAME>notice01.jpg
    <TEXT>
    Document 11 - file: notice01.jpg

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    <SEQUENCE>12
    <FILENAME>notice02.jpg
    <TEXT>
    Document 12 - file: notice02.jpg

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    <TYPE>GRAPHIC
    <SEQUENCE>13
    <FILENAME>phone.jpg
    <TEXT>
    Document 13 - file: phone.jpg

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    <SEQUENCE>14
    <FILENAME>proxy01.jpg
    <TEXT>
    Document 14 - file: proxy01.jpg

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    <SEQUENCE>15
    <FILENAME>proxy02.jpg
    <TEXT>
    Document 15 - file: proxy02.jpg

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    <TYPE>GRAPHIC
    <SEQUENCE>16
    <FILENAME>smallcwhite.jpg
    <TEXT>
    Document 16 - file: smallcwhite.jpg

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    <TYPE>GRAPHIC
    <SEQUENCE>17
    <FILENAME>smallmwhite.jpg
    <TEXT>
    Document 17 - file: smallmwhite.jpg

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