USS Belle Isle (AG-73/AKS-21) was a Basilan-class miscellaneous auxiliary acquired by the U.S. Navy during World War II.

Belle Isle (AG 73) was laid down on 19 September 1944 at South Portland, Maine, by the New England Shipbuilding Corporation under a U.S. Maritime Commission contract (MCE hull 3070); launched on 3 November 1944; sponsored by Miss Sally Goding; transferred to the Navy on a loan basis on 15 November 1944; commissioned that same day for the voyage to the conversion yard; decommissioned on 18 November 1944 at Hoboken, New Jersey, for conversion to an electronics repair ship by the Bethlehem Steel Corporation; and recommissioned on 13 July 1945.

She was decommissioned on 30 August 1946 and berthed with the San Diego Group, Pacific Reserve Fleet.

On 18 August 1951, while still in reserve, Belle Isle was reclassified a stores issue ship and redesignated AKS-211.

In November 1960, the ships in Destroyer Squadron 13 sank the Belle Isle off the coast of San Diego.