USS Jennings County (LST-846) was an LST-542-class tank landing ship built for the United States Navy during World War II.

Originally laid down as LST-846 by the American Bridge Company of Ambridge, Pennsylvania on 27 October 1944; the ship was launched on 12 December, sponsored by Mrs. L. P. Quill; and commissioned on 9 January 1945.

After the Chinese Communist Revolution, the veteran landing ship returned to the United States, arriving San Diego on 17 June 1949.

Arriving Yokosuka early June, the landing ship operated out of Japan performing cargo runs and amphibious training until 6 September when she sailed for the east coast of Korea.

She also performed station ship duties during "Operation Passage to Freedom" as naval units transported thousands of Vietnamese from North to South Vietnam after the partition of the country.

After ten years with the Pacific Reserve Fleet, Jennings County recommissioned on 11 June 1966 to support U.S. forces in South Vietnam.

Jennings County reported on-station to CTF 116 on 7 November 1966 and operated as a Patrol Craft Tender (AGP) for the next 40 months on the rivers of the Mekong Delta.

In 1970, while off the coast of Son On Doc at the southern tip of South Vietnam the ship suffered a serious fire in its auxiliary engine room that rendered it unable to continue operations.