USS Confederacy was a 36-gun sailing frigate of the Continental Navy in the American Revolutionary War.
She was launched 8 November 1778 at Chatham (Norwich?), Connecticut, and towed to New London to be prepared for sea. From 1 May to 24 August 1779 she cruised on the Atlantic coast under the command of Captain Seth Harding. While convoying a fleet of merchantmen, on 6 June, she and Deane captured three prizes, drove off two British frigates and brought the convoy safely into Philadelphia, Pennsylvania.