USS Benton was an ironclad river gunboat in the United States Navy during the American Civil War. She was named for American senator Thomas Hart Benton. Benton was a former center-wheel catamaran snagboat and was converted by James B. Eads, St. Louis, Missouri, in 1861 and commissioned February 24, 1862 as part of the Army's Western Gunboat Flotilla.

The Mississippi River Squadron was the Union brown-water naval squadron that operated on the western rivers during the American Civil War. It was initially created as a part of the Union Army, although it was commanded by naval officers, and was then known as the Western Gunboat Flotilla and sometimes as the Mississippi Flotilla. It received its final designation when it was transferred to the Union Navy at the beginning of October 1862.