USS Adair (APA-91) was a Windsor-class attack transport in service with the United States Navy from 1944 to 1946.

During 1944 and 1945 Adair carried troops and cargo between Pearl Harbor, Eniwetok, Saipan, Tinian, Ulithi, Hollandia, Manus, and Guam, with two diversions to amphibious duty.

She also served with the Operation Magic Carpet fleet, returning American servicemen to the United States from the Pacific.

Adair reported to Commander, 5th Naval District, 8 March 1946; was decommissioned 30 April 1946; and returned to the Maritime Commission 3 May 1946.

Adair was sold in 1947 to American Export Lines, Inc., New York, who renamed her SS Express.