South Portland

City in southwestern Maine, on Casco Bay at the mouth of the Fore River, opposite Portland, of which it is a residential and commercial suburb; population (1990) 23,200. A shipbuilding centre since the 17th century, South Portland now has an oil terminal, copperworks, rolling mills, timberyards, and factories producing nylon, wire, and pipes.

Fort Preble (1808–11), Southern Maine Vocational and Technical Institute, the Portland International Jetport, and much of the Maine Mall, the state's largest shopping complex, are in the city.