St Francois County, Missouri

Settlement in the region greatly increased with the Louisiana Purchase, and by 1821, the population had grown enough to warrant the creation of St. Francois County. St. Francois County, which was named after the St. Francois River, was organized from Jefferson, Ste. Genevieve, and Washington Counties. Farmington became the seat of the new county very soon after. [1]

1. Debbie Sheals, Private Contractor, Courthouse Square Historic District, St. Francois County, Missouri, nomination document, 2003, National Park Service, National Register of Historic Places, Washington, D.C.