Duluth is a port city in the U.S. state of Minnesota and the county seat of St. Louis County. Duluth has a population of 85,618, making it Minnesota's fourth-largest city and the center of Minnesota's second-largest metropolitan area, with a population of 278,799. Duluth forms a metropolitan area with neighboring Superior, Wisconsin; together, they are called the Twin Ports. The city is named for Daniel Greysolon, Sieur du Lhut, the area's first known European explorer.
Situated on the north shore of Lake Superior at the westernmost point of the Great Lakes, Duluth is the largest metropolitan area (and second-largest city) on the lake and is accessible to the Atlantic Ocean 2,300 miles away via the Great Lakes Waterway and St. Lawrence Seaway. The Port of Duluth is the world's farthest inland port accessible to oceangoing ships and by far the largest and busiest port on the Great Lakes. The port is ranked among the top 20 ports in the United States by tonnage. Commodities shipped from the Port of Duluth include coal, iron ore, grain, limestone, cement, salt, wood pulp, steel coil, and wind turbine components.