USS Circassian was a large steamer captured by the Union Navy during the American Civil War.

Circassian, an iron screw steamer, was captured 4 May 1862 by USS Somerset; purchased from the prize court at Key West, Florida, 8 November 1862; outfitted at New York Navy Yard; and commissioned 12 December 1862, Acting Volunteer Lieutenant W. B. Eaton in command.

Between 17 December 1862 and 11 April 1865 she completed nine cruises from New York City or Boston, Massachusetts, delivering supplies to ships and stations along the Atlantic coast and in the Gulf of Mexico as far west as Galveston, Texas, and up the Mississippi River to New Orleans, Louisiana.

On return trips she carried men due to be discharged, invalids, prisoners of war, cotton and provisions.

This article incorporates text from the public domain Dictionary of American Naval Fighting Ships.