St. Charles County, Missouri
St. Charles County is a county in Missouri with an estimated population of 416,659 in 2023. 15 cities, towns and Census places in it are indexed here.
Largest places in St. Charles County
O'Fallon 94,074St. Charles 71,800St. Peters 59,413Wentzville 47,497Lake St. Louis 18,661Dardenne Prairie 13,803Cottleville 6,043Weldon Spring 5,263St. Paul 3,622Flint Hill 846Josephville 543New Melle 538West Alton 350Portage Des Sioux 325Augusta 264
About St. Charles County
St. Charles County is one of the counties of Missouri. County governments in Missouri handle local services such as courts, property records and elections; cities and towns inside the county run their own municipal services. Population figures come from the Census Bureau's Vintage 2023 estimates, which are updated annually.