Duluth is a port city in the U.S. state of Minnesota and the county seat of St. Louis County. Located on Lake Superior in Minnesota's Arrowhead Region, the city is a hub for cargo shipping. The population was 86,697 at the 2020 census, making it Minnesota's fifth-largest city. Duluth forms a metropolitan area with neighboring Superior, Wisconsin, called the Twin Ports. Duluth is south of the Iron Range and the Boundary Waters Canoe Area Wilderness. It is named after Daniel Greysolon, Sieur du Lhut, the area's first known European explorer.