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): JANUARY 7, 2004

                              --------------------

                           MERCANTILE BANK CORPORATION
             (Exact name of registrant as specified in its charter)



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



 5650 BYRON CENTER AVENUE SW, WYOMING, MICHIGAN                49509
     (Address of principal executive offices)                (Zip Code)


Registrant's telephone number, including area code           616-406-3777












ITEM 12.  RESULTS OF OPERATIONS AND FINANCIAL CONDITION.

         Earnings Release. On January 7, 2004, Mercantile Bank Corporation
issued a press release reporting earnings and other financial results for the
quarter and year ended December 31, 2003. A copy of the press release is
attached as Exhibit 99.1 and incorporated here by reference.

         The information in this Current Report on Form 8-K, including Exhibit
99.1, shall not be deemed "filed" for purposes of Section 18 of the Securities
Exchange Act of 1934 or otherwise subject to the liability of that section, nor
shall it be deemed incorporated by reference in any filing under the Securities
Act of 1933.









                                   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:  January 7, 2004












                                  EXHIBIT INDEX


Exhibit Number                 Description

      99.1                     Press release of Mercantile Bank Corporation
                               reporting financial results and earnings for the
                               quarter and year ended December 31, 2003.