USS PGM-1 was a PGM-1 class motor gunboat that served in the United States Navy during World War II. She was originally laid down as an SC-497 class submarine chaser on 29 November 1941 by the Peterson Boat Works in Sturgeon Bay, Wisconsin and launched on 27 June 1942. She was commissioned as USS SC-644 on 16 October 1942. She was later converted to a PGM-1 class motor gunboat and renamed PGM-1 on 10 December 1943. The PGM-1 received one battle star for action in the Northern Solomon Islands on 15 June 1944.