USS Proserpine (ARL-21) was one of 39 Achelous-class landing craft repair ships built for the United States Navy during World War II.

Named for Proserpine (a Latinized form of Persephone, from Greek mythology; the daughter of Zeus and Demeter, abducted by Hades (Pluto) and made his wife), she was the only U.S.

She then decommissioned 15 February at Gibbs Gas Engine Company of Jacksonville, Florida underwent conversion, and recommissioned as USS Proserpine (ARL–21), a landing craft repair ship, 31 May 1945.

From there she moved on to provide mobile repair services at Eniwetok through 16 September, at Guam through 6 October, and at Leyte in the Philippine Islands through 1 April 1946.

By the end of April, 1946 Proserpine stood out of Pearl Harbor and proceed via the Panama Canal, Houston, and New Orleans for Mayport, Florida, arriving there 1 May.