USS Douglas County (LST-731) was an LST-542-class tank landing ship built for the United States Navy during World War II.

LST-731 was laid down on 27 December 1943 at Pittsburgh, Pennsylvania, by the Dravo Corporation of Neville Island; launched on 12 February 1944; sponsored by Mrs. A. J. Ackerman; and commissioned on 30 March 1944.

During World War II, LST-731 was assigned to the Asiatic-Pacific theater and participated in the following operations: capture and occupation of Guam (July and August, 1944), and assault and occupation of Iwo Jima (February and March, 1945).

Following the war, LST-731 was redesignated hospital ship LSTH-731 on 15 September 1945 and performed occupation duty in the Far East until mid-February, 1946.

The ship received the name USS Douglas County (LST-731) on 1 July 1955 and was struck from the Naval Vessel Register on 1 November 1958.