Duluth is a
seaport city in the
U.S. state of
Minnesota and the
county seat of
Saint Louis County. Duluth has a population of 86,238 and is the second-largest city on
Lake Superior's shores, after
Thunder Bay,
Ontario, on the lake's
Canadian border; it does, however, have the largest metropolitan area on the lake. The Duluth
MSA had a population of 279,771 in 2010, the second-largest in Minnesota. The combined urban population of Duluth and its adjacent communitiesincluding Proctor, Hermantown, and
Superior, Wisconsintotals over 131,000, based on 2010 census figures.