Morgan City, city (1990 pop. 14,531), St. Mary parish, S La., a fishing port on the Atchafalaya River (connected to the Intracoastal Waterway); inc. 1860 as Brasher, renamed 1876. The city is headquarters for offshore petroleum drilling and has oil and gas wells. Also in Morgan City are shipyards, a large shrimp fleet, an oyster industry, and alligator farms. Barges, propeller shafts, crewboats, and yachts are manufactured. The Louisiana Shrimp and Petroleum Festival is held in the city.