USS Klamath (1865)
 USS Klamath — a single-turreted twin-screw monitor of the United States Navy — was launched 20 April 1865 by S. T. Hambleton & Co. Cincinnati OH under subcontract with Alexander Swift & Co. also of Cincinnati OH. She was delivered to the Navy on 6 May 1866 but was never commissioned and saw no service. Klamath was a Casco-class light-draft monitor intended for service in the shallow bays rivers and inlets of the Confederacy.