Oswego Harbor West Pierhead Light stands at the mouth of the Oswego River on a long breakwater extending into Lake Ontario and continues to serve as an active aid to navigation for vessels entering the harbor. Built in 1934 and expanded with keeper’s quarters in 1936, it remained staffed until automation in 1968. The lighthouse is notable for its concrete caisson base, combined living quarters and tower, and its role in a 1942 tragedy when six Coast Guardsmen died during a keeper transfer. Its original Fresnel lens was moved to a local maritime museum in 1995, and the structure remains Oswego’s only surviving lighthouse.