Duluth, Minnesota, the seat of St. Louis County. It is in northeastern Minnesota on Lake Superior at the mouth of the St. Louis River. Across the river lies Superior, Wisconsin.

Duluth is one of the nation's leading inland ports and the western terminus of the Great Lakes-St. Lawrence Seaway system. Grain, iron ore, coal, and petroleum are among the products handled. Duluth is also a significant manufacturing center, producing processed foods, metalwares, machinery, and transportation equipment. Several railways, an Interstate highway, and an international airport serve the city.

Duluth has a marine museum, a transportation museum, a zoo, and several nearby ski areas. The city is home to the Great Lakes Aquarium, an all-freshwater aquarium. A branch of the University of Minnesota and the College of St. Scholastica are here.

Duluth was the site of fur trading posts for many years before a permanent settlement was made in 1856. The settlement was named for Sieur Duluth, a 17th-century French explorer. After the discovery of iron ore in the Mesabi and Vermilion ranges late in the 19th century, Duluth became one of the world's largest ore-shipping points.

Population: 86,918.