Mercantile Bank Corporation Announces Webcast of Third Quarter 2007 Conference Call

Mercantile Bank Corporation (Nasdaq: MBWM) will hold a conference call to discuss third quarter results on Wednesday, October 10, 2007 at 10:00 a.m. Eastern Time. This call can be accessed at Mercantile’s web site at www.mercbank.com for one month following the call. About Mercantile Bank Corporation Mercantile Bank Corporation is the bank holding company for Mercantile Bank of Michigan. Headquartered in Grand Rapids, the Bank provides a wide variety of commercial banking services through its five full-service banking offices in greater Grand Rapids, and its full-service banking offices in Holland, Lansing, and Ann Arbor, Michigan. The Company recently announced its expansion into the Oakland County market. Mercantile Bank Corporation’s common stock is listed on the Nasdaq Global Select Market under the symbol "MBWM.”