DALLAS, July 24, 2012 /PRNewswire/ -- The Board of Directors of Comerica Incorporated today declared a quarterly cash dividend for common stock of 15 cents ($0.15) per share. The dividend is payable October 1, 2012, to common stock shareholders of record September 15, 2012. As September 15, 2012 falls on a Saturday, the effective record date for the dividend will be the close of business on Friday, September 14, 2012.