St. Louis County is a county in the Arrowhead Region of Minnesota. As of the 2020 census, the population was 200,231. Its county seat is Duluth. It is the largest county in Minnesota by land area, and the largest in the United States by total area east of the Mississippi River.
St. Louis County is included in the Duluth, MN–Superior, WI Metropolitan Statistical Area.
Major industries include pulpwood production and tourism. Open pit mining of taconite and processing it into high grade iron ore remains an important part of the economy of the Iron Range and is directly tied to shipping in the twin ports of Duluth and Superior. Parts of the federally recognized Bois Forte and Fond du Lac Indian reservations are in the county.
History
This area was long inhabited by Algonquian-speaking tribes: the Ojibwe (Chippewa), Ottawa and Potawatomi peoples were loosely affiliated in the Council of Three Fires. As American settlers entered the territory, the Native Americans were pushed to outer areas.
The Minnesota Legislature established St. Louis County on February 20, 1855, as Doty County, and changed its name to Newton County on March 3, 1855. It originally consisted of the area east and south of the St. Louis River, while the area east of the Vermilion River and north of the St. Louis River was part of Superior County. Superior County was renamed St. Louis County.
On March 1, 1856, that St. Louis County was renamed as Lake County. Newton County was renamed as St. Louis County and had that eastern area added to it; it was also expanded westward by incorporating parts of Itasca County, which then also included most of Carlton County. On May 23, 1857, St. Louis County took its current shape when Carlton County was formed from parts of St. Louis and Pine counties.
Geography
According to the United States Census Bureau, the county has a total area of , of which is land and (8.9%) is water. It is the largest county in Minnesota and the largest (by total area) in the United States east of the Mississippi River. St. Louis County is the only county in the United States which has a coastline and borders both another country and another state.
Voyageurs National Park, established in 1975, is located in its northwestern corner, on the south shore of Rainy Lake on the Canada–US border; it is popular with water enthusiasts and fishers. The county includes parts of Superior National Forest, established in 1909, and the Boundary Waters Canoe Area Wilderness on the border, established in 1978. The BWCAW is a wilderness area designated for fishing, camping, hiking, and canoeing, and is one of the most visited wilderness areas in the United States. St. Louis County has more than 500 lakes. The largest lakes are Pelican and Vermilion.
The "Hill of Three Waters" on the Laurentian Divide lies northeast of Hibbing. Rainfall on this hill runs to three watersheds: Hudson Bay to the north, the Gulf of Saint Lawrence to the east (via Lake Superior), or the Gulf of Mexico to the south and west (via the Mississippi River). The county is drained by the St. Louis, Vermilion, and other rivers. Public schools and other government offices shut down on January 29–30, 2019 because of wind chills of . This apparent anomaly was attributed to changes in the global jet stream due to the climate change.