Superior is a city in, and the county seat of, Douglas County in the U.S. state of Wisconsin. The population was 26,751 at the 2020 census. Located at the junction of U.S. Highway 2 and U.S. Highway 53, it is immediately north of, and adjacent to, both the Village of Superior and the Town of Superior. Its neighborhoods include Billings Park, North End, South Superior, Central Park, East End, Allouez, and Itasca. Billings Park, South Superior, East End, and North End each have small business districts.
Superior is at the western end of Lake Superior in northwestern Wisconsin. Bordered by Saint Louis, Superior, and Allouez bays, the city is framed by two rivers: the Nemadji and the Saint Louis. Superior and the neighboring city across the bay, Duluth, Minnesota, form a single metropolitan area called the Twin Ports. They share a harbor that is one of the most important ports on the Great Lakes. Both cities feature museum ships, devoted to the local maritime heritage. Superior was the final port of call for SS Edmund Fitzgerald before her sinking on November 10, 1975. It is an industrial city, with ship harbors along two sides, several large rail yards, an oil refinery, and shipyard.