    <SEC-DOCUMENT>0001437749-24-001324-index.html : 20240116
    <SEC-HEADER>0001437749-24-001324.hdr.sgml : 20240116
    <ACCEPTANCE-DATETIME>20240116085912
    ACCESSION NUMBER:		0001437749-24-001324
    CONFORMED SUBMISSION TYPE:	8-K
    PUBLIC DOCUMENT COUNT:		53
    CONFORMED PERIOD OF REPORT:	20240116
    ITEM INFORMATION:		Results of Operations and Financial Condition
    ITEM INFORMATION:		Regulation FD Disclosure
    ITEM INFORMATION:		Financial Statements and Exhibits
    FILED AS OF DATE:		20240116
    DATE AS OF CHANGE:		20240116

    FILER:

    	COMPANY DATA:
    		COMPANY CONFORMED NAME:			MERCANTILE BANK CORP
    		CENTRAL INDEX KEY:			0001042729
    		STANDARD INDUSTRIAL CLASSIFICATION:	STATE COMMERCIAL BANKS [6022]
    		ORGANIZATION NAME:           	02 Finance
    		IRS NUMBER:				383360865
    		STATE OF INCORPORATION:			MI
    		FISCAL YEAR END:			1231

    	FILING VALUES:
    		FORM TYPE:		8-K
    		SEC ACT:		1934 Act
    		SEC FILE NUMBER:	000-26719
    		FILM NUMBER:		24533821

    	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>8-K
    <SEQUENCE>1
    <FILENAME>mbwm20240111_8k.htm
    <DESCRIPTION>FORM 8-K
    <TEXT>
    Document 1 - file: mbwm20240111_8k.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-99.1
    <SEQUENCE>2
    <FILENAME>ex_614710.htm
    <DESCRIPTION>EXHIBIT 99.1
    <TEXT>
    Document 2 - file: ex_614710.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-99.2
    <SEQUENCE>3
    <FILENAME>ex_614711.htm
    <DESCRIPTION>EXHIBIT 99.2
    <TEXT>
    Document 3 - file: ex_614711.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-101.SCH
    <SEQUENCE>4
    <FILENAME>mbwm-20240116.xsd
    <DESCRIPTION>XBRL TAXONOMY EXTENSION SCHEMA
    <TEXT>
    Document 4 - file: mbwm-20240116.xsd

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-101.DEF
    <SEQUENCE>5
    <FILENAME>mbwm-20240116_def.xml
    <DESCRIPTION>XBRL TAXONOMY EXTENSION DEFINITION LINKBASE
    <TEXT>
    Document 5 - file: mbwm-20240116_def.xml

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-101.LAB
    <SEQUENCE>6
    <FILENAME>mbwm-20240116_lab.xml
    <DESCRIPTION>XBRL TAXONOMY EXTENSION LABEL LINKBASE
    <TEXT>
    Document 6 - file: mbwm-20240116_lab.xml

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-101.PRE
    <SEQUENCE>7
    <FILENAME>mbwm-20240116_pre.xml
    <DESCRIPTION>XBRL TAXONOMY EXTENSION PRESENTATION LINKBASE
    <TEXT>
    Document 7 - file: mbwm-20240116_pre.xml

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>8
    <FILENAME>mbc01.jpg
    <TEXT>
    Document 8 - file: mbc01.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>9
    <FILENAME>mbc_page21.jpg
    <TEXT>
    Document 9 - file: mbc_page21.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>10
    <FILENAME>mip01.jpg
    <TEXT>
    Document 10 - file: mip01.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>11
    <FILENAME>mip02.jpg
    <TEXT>
    Document 11 - file: mip02.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>12
    <FILENAME>mip03.jpg
    <TEXT>
    Document 12 - file: mip03.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>13
    <FILENAME>mip04.jpg
    <TEXT>
    Document 13 - file: mip04.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>14
    <FILENAME>mip05.jpg
    <TEXT>
    Document 14 - file: mip05.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>15
    <FILENAME>mip06.jpg
    <TEXT>
    Document 15 - file: mip06.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>16
    <FILENAME>mip07.jpg
    <TEXT>
    Document 16 - file: mip07.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>17
    <FILENAME>mip08.jpg
    <TEXT>
    Document 17 - file: mip08.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>18
    <FILENAME>mip09.jpg
    <TEXT>
    Document 18 - file: mip09.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>19
    <FILENAME>mip10.jpg
    <TEXT>
    Document 19 - file: mip10.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>20
    <FILENAME>mip11.jpg
    <TEXT>
    Document 20 - file: mip11.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>21
    <FILENAME>mip12.jpg
    <TEXT>
    Document 21 - file: mip12.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>22
    <FILENAME>mip13.jpg
    <TEXT>
    Document 22 - file: mip13.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>23
    <FILENAME>mip14.jpg
    <TEXT>
    Document 23 - file: mip14.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>24
    <FILENAME>mip15.jpg
    <TEXT>
    Document 24 - file: mip15.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>25
    <FILENAME>mip16.jpg
    <TEXT>
    Document 25 - file: mip16.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>26
    <FILENAME>mip17.jpg
    <TEXT>
    Document 26 - file: mip17.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>27
    <FILENAME>mip18.jpg
    <TEXT>
    Document 27 - file: mip18.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>28
    <FILENAME>mip19.jpg
    <TEXT>
    Document 28 - file: mip19.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>29
    <FILENAME>mip20.jpg
    <TEXT>
    Document 29 - file: mip20.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>30
    <FILENAME>mip22.jpg
    <TEXT>
    Document 30 - file: mip22.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>31
    <FILENAME>mip23.jpg
    <TEXT>
    Document 31 - file: mip23.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>32
    <FILENAME>mip24.jpg
    <TEXT>
    Document 32 - file: mip24.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>33
    <FILENAME>mip25.jpg
    <TEXT>
    Document 33 - file: mip25.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>34
    <FILENAME>mip26.jpg
    <TEXT>
    Document 34 - file: mip26.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>35
    <FILENAME>mip27.jpg
    <TEXT>
    Document 35 - file: mip27.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>36
    <FILENAME>mip28.jpg
    <TEXT>
    Document 36 - file: mip28.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>37
    <FILENAME>mip29.jpg
    <TEXT>
    Document 37 - file: mip29.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>38
    <FILENAME>mip30.jpg
    <TEXT>
    Document 38 - file: mip30.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>39
    <FILENAME>mip31.jpg
    <TEXT>
    Document 39 - file: mip31.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>40
    <FILENAME>mip32.jpg
    <TEXT>
    Document 40 - file: mip32.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>41
    <FILENAME>mip33.jpg
    <TEXT>
    Document 41 - file: mip33.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>42
    <FILENAME>mip34.jpg
    <TEXT>
    Document 42 - file: mip34.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>43
    <FILENAME>mip35.jpg
    <TEXT>
    Document 43 - file: mip35.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>44
    <FILENAME>mip36.jpg
    <TEXT>
    Document 44 - file: mip36.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>45
    <FILENAME>mip37.jpg
    <TEXT>
    Document 45 - file: mip37.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>46
    <FILENAME>R1.htm
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 46 - file: R1.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>47
    <FILENAME>mbwm20240111_8k_htm.xml
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 47 - file: mbwm20240111_8k_htm.html

    Document 47 - RAW XML: mbwm20240111_8k_htm.xml

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EXCEL
    <SEQUENCE>48
    <FILENAME>Financial_Report.xlsx
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 48 - file: Financial_Report.xlsx

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>49
    <FILENAME>Show.js
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 49 - file: Show.js

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>50
    <FILENAME>report.css
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 50 - file: report.css

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>51
    <FILENAME>FilingSummary.xml
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 51 - file: FilingSummary.html

    Document 51 - RAW XML: FilingSummary.xml

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>JSON
    <SEQUENCE>53
    <FILENAME>MetaLinks.json
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 53 - file: MetaLinks.json

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>ZIP
    <SEQUENCE>54
    <FILENAME>0001437749-24-001324-xbrl.zip
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 54 - file: 0001437749-24-001324-xbrl.zip

    </DOCUMENT>
    </SEC-DOCUMENT>