It was an unorganized part of the Northwest Territory until 1802 when all of the land from St. Louis north to the Canadian border was organized as St. Clair County.
这里曾是西北地区一个无人管理的地区，直到1802年，所有从圣路易斯北部到加拿大边境的土地被组建成为聖克萊爾縣。