UNITED STATES
SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT
Pursuant to Section 13 or 15(d) of the
Securities Exchange Act of 1934

Date of Report (date of earliest event reported): May 7, 2010

Mercantile Bank Corporation

(Exact name of registrant as specified in its charter)

Michigan
(State or other jurisdiction
of incorporation) 000-26719
(Commission File Number) 38-3360865
(IRS Employer
Identification Number)

310 Leonard Street NW, Grand Rapids, Michigan	49504
(Address of principal executive offices)	(Zip Code)

Registrant’s telephone number, including area code 616-406-3000

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below):

o     Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

o     Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

o     Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

o     Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Item 5.02 Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers.

     Retirement of Director. On May 7, 2010, our director, Peter A. Cordes, advised us that he is retiring from our Board of Directors, and that of our subsidiary, Mercantile Bank of Michigan, effective that day. Mr. Cordes has served as a member of our Board of Directors since 1997. Mr. Cordes’ decision to retire is not a result of any disagreement with us relating to our operations, policies or practices.

Signatures

     Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

Mercantile Bank Corporation
By:	/s/ Charles E. Christmas
	Charles E. Christmas
	Senior Vice President, Chief Financial Officer and Treasurer

Date: May 10, 2010

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