Mille Lacs County, Minnesota: History
The US legislature established the Wisconsin Territory effective July 3, 1836. It existed until its eastern portion was granted statehood (as Wisconsin) in 1848. The federal government set up the Minnesota Territory from the remaining territory effective March 3, 1849. The newly organized territorial legislature created nine counties across the territory in October of that year. On May 23, 1857, one of those original counties, Benton, had its eastern portion partitioned off to create Mille Lacs County. The original county consisted of the portion of the contemporary Mille Lacs County east of the west branch of the Rum River and two townships now part of Isanti County, adjacent to Mille Lacs County. In 1858 the 12 townships forming the contemporary southern 10 townships of Mille Lacs County and the two northwestern townships in Isanti County were organized apart from Benton and Mille Lacs Counties to form Monroe County, leaving the northern "Square Top-knot" as Mille Lacs County. In 1860, Monroe and Mille Lacs Counties merged. Shortly thereafter, the two southeastern townships were transferred to Isanti County, forming the county's present boundaries.