Anna Maria Island, sometimes called Anna Maria Key, is a barrier island on the coast of Manatee County, Florida in the United States. It is bounded on the west by the Gulf of Mexico, on the south by Longboat Pass (which separates it from Longboat Key), on the east by Anna Maria Sound, and on the north by Tampa Bay. Anna Maria Island is approximately seven miles long north to south. Anna Maria Island is at latitude 27.513N, longitude -82.719W.