USS Shawnee was a single-turreted, twin-screw monitor built by Curtis & Tilden, Boston, Massachusetts, United States. It was delivered 22 July 1865, and commissioned 18 August 1865. Shawnee was a Casco-class, light-draft monitor intended for service in the shallow bays, rivers, and inlets of the Confederacy. These warships sacrificed armor plate for a shallow draft and were fitted with a ballast compartment designed to lower them in the water during battle.