USS Thurston (AP-77) was a troop transport that served with the United States Navy during World War II. She was named after counties in Nebraska and Washington. Thurston was laid down under Maritime Commission contract (MC hull 134) as SS Delsantos (sometimes styled as Del Santos) on 9 December 1941 at Kearney, New Jersey, by the Federal Shipbuilding & Drydock Company, for the Mississippi Shipping Company; launched on 4 April 1942; and delivered on 11 July 1942. The ship was acquired by the Navy from the War Shipping Administration under a bare boat charter on 13 September 1942 and was renamed Dauphin and designated AP-77 on 16 September. However, to avoid confusion with a Canadian ship named Dauphin, the ship was again renamed on 18 September, this time as Thurston.