USS Sigourney (DD-643) was a Fletcher-class destroyer, the second ship of the United States Navy to be named for James Sigourney, an officer during the War of 1812. Sigourney was laid down on 7 December 1942 by Bath Iron Works Corp., Bath, Maine, launched on 24 April 1943, sponsored by Miss Amy C. Olney; and commissioned on 29 June 1943.