St. Louis County, Minnesota: 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.