USS Lyon (AP-71) was a type C3 ship of the United States Navy which played an extensive role in naval transportation during World War II. The Lyon was built as Mormactide under a Maritime Commission (MC) contract by the Ingalls Shipbuilding Company of Pascagoula, Mississippi. She was laid down 21 August 1939, and was launched on 12 October 1940; sponsored by Gloria McGehee.