Duluth (listen) is a port city in the U.S. state of Minnesota and the county seat of Saint 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.
Situated on the north shore of Lake Superior at the westernmost point of the Great Lakes, Duluth is accessible to the Atlantic Ocean 2,300 miles (3,700 km) away via the Great Lakes Waterway and the Saint Lawrence Seaway. The Port of Duluth is the farthest inland port in the world accessible to oceangoing ships, and is 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.
Duluth forms a metropolitan area with neighboring Superior, Wisconsin; together they are called the Twin Ports.
A tourist destination for the Midwest, Duluth features the United States' only all-freshwater aquarium, the Great Lakes Aquarium, the Aerial Lift Bridge, which sits 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.
The city is named for Daniel Greysolon, Sieur du Lhut, the first known European explorer of the area.