USS LST-504 was an LST-491-class tank landing ship built for the United States Navy during World War II. Renamed USS Buchanan County (LST-504) for counties in Iowa, Missouri, and Virginia on 1 July 1955, she was the only U.S. Naval vessel to bear the name. LST-504 was laid down on 21 July 1943 at Jeffersonville, Indiana by the Jeffersonville Boat & Machine Company; launched on 19 October 1943; sponsored by Mrs. W. J. Griffin; and commissioned on 18 December 1943. During World War II, LST-504 was assigned to the European Theater and participated in the Invasion of Normandy.