HEYSHAM, seaport, urban district, Lancaster parliamentary division, Lancashire, England, on the south shore of Morecambe bay, served by the L.M.S. railway. Pop. (1921) 5,027 ; area 1,974 acres. A harbour was opened in 1904 by the Midland (now L.M.S.) railway. The harbour is enclosed by breakwaters, and has a depth of 17 ft. at low tide. It has extensive accommodation for live stock and merchandise, and has regular services with Belfast and other Irish ports. Heysham is in some favour as a watering-place. The church of St. Peter is mainly Norman, and has fragments of even earlier date. Ruins of a very ancient oratory stand near it. This was dedicated to St. Patrick, and is traditionally said to have been erected as a place of prayer for those at sea.