formerly Marshfield Bay
Town (pop., 2000: 15,374), southwestern Oregon, U.S. Located on Coos Bay, an inlet of the Pacific, it was settled as Marshfield in 1854 and developed early shipbuilding industries.
In the early 1900s it became a major lumber-shipping port. A port of entry, it also processes seafood products and is the heart of a seaside resort area. Incorporated in 1874, it was renamed Coos Bay (after an Indian tribal name) in 1944.