USS Errol (AG-133/AKL-4) was a Camano-class cargo ship constructed for the U.S. Army as USA FS-274 shortly before the end of World War II and later acquired by the U.S. Navy in 1947.

She was configured as a transport and cargo ship and was assigned to serve the World War II Trust Territories in the Pacific Ocean.

Errol (AG-133) was built in 1944 by Wheeler Shipbuilding Corp., Whitestone, Long Island, New York, for the U.S. Army as USAT FS-274; acquired by the Navy 3 April 1947; and commissioned 9 July 1947.

From September to December 1949 she was overhauled at Pearl Harbor, the only interruption to her constant operations in the Pacific.

She was decommissioned 31 July 1951, and lent to the U.S. Department of the Interior for similar duty the same day.