The Treaty of Lake Poygan arranged for the sale of 4,500,000 acres (18,000 km2) of Menominee Native American lands in Wisconsin to the government of the United States for $350,000 plus 600,000 acres (2,400 km2) in Crow Wing County, Minnesota, west of the upper Mississippi River, to which the Menominee were asked to move. It was negotiated on October 18, 1848 at Lake Poygan, near Winneconne, Wisconsin.