USS Agenor (ARL-3) was one of 39 Achelous-class landing craft repair ships built for the United States Navy during World War II. Named for Agenor (in history and Greek mythology, a king of Tyre), she was the only U.S. Naval vessel to bear the name. Originally projected as LST-490 but redesignated ARL-3 and named Agenor on 13 January 1943; laid down on 24 January 1943 by Kaiser Company, Inc. of Vancouver, Washington; launched on 3 April 1943; and commissioned at San Francisco on 20 August 1943, Lieutenant Argyle W. Markley in command.