USS Deimos (AK-78) was a Crater-class cargo ship in the service of US Navy in World War II.

Deimos was laid down 27 November 1942, as liberty ship SS Hugh McCulloch, renamed SS Chief Ouray, MCE hull 513, by Permanente Metals Corporation, Richmond, California, under a Maritime Commission (MARCOM) contract.

[4] Deimos sailed from San Francisco 27 January 1943, with cargo for Espiritu Santo, New Hebrides, and Townsville, Australia.

Returning to her base, she was torpedoed by the Imperial Japanese Navy submarine Ro-103[5] on 23 June, on the port side, aft.

[4] Deimos received one battle star for World War II service.