Duluth ( (listen) də-LOOTH) is a port city in the U.S. state of Minnesota and the county seat of St. Louis County. Duluth has a population of 86,697, 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 (3,700 km) 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.
A tourist destination for the Midwest, Duluth features the United States' only all-freshwater aquarium, the Great Lakes Aquarium; the Aerial Lift Bridge, which is adjacent to Canal Park and spans the Duluth Ship Canal into the Duluth–Superior harbor; and Minnesota Point (known locally as Park Point), the world's longest freshwater baymouth bar, spanning 6 miles (10 km). The city is also the starting point for vehicle trips touring the North Shore of Lake Superior toward Ontario, Canada.