USS Antaeus (AS-21/AG-67) was a commercial passenger liner that the United States Navy acquired in World War II. She was SS Saint John from 1932 until 1941 before the US Navy acquired her and commissioned her as Antaeus. From 1941 to 1943, she was a submarine tender; she was later redesignated AG-67 and used as a troop transport from 1943 to 1944. In 1945, she was converted to a hospital ship, renamed USS Rescue (AH-18), and served in the Pacific War. Decommissioned in 1946, she was sold for scrap in 1958.