 GRAND RAPIDS, Mich., Oct. 19, 2021 PRNewswire -- Mercantile Bank Corporation NASDAQ: MBWM Mercantile announced today that on October 14, 2021, its Board of Directors declared a regular quarterly cash dividend of 0.30 per common share, payable on December 15, 2021, to holders of record as of December 3, 2021. 