USS Winnebago was a double-turret Milwaukee-class river monitor, named for the Winnebago tribe of Siouan Indians, built for the Union Navy during the American Civil War. The ship participated in the Battle of Mobile Bay in 1864, during which she was lightly damaged, and the bombardments of Forts Gaines and Morgan as Union troops besieged the fortifications defending the bay. In early 1865, Winnebago again supported Union forces during the Mobile Campaign as they attacked Confederate fortifications defending the city of Mobile, Alabama. She was placed in reserve after the end of the war and sold in 1874.