O'Fallon, Missouri

O'Fallon is a city in St. Charles County, Missouri, United States.

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v t e Municipalities and communities of St. Charles County, Missouri, United States
County seat: St. Charles
Cities	Augusta Cottleville Dardenne Prairie Flint Hill Foristell‡ Lake St. Louis New Melle O'Fallon Portage Des Sioux St. Charles St. Paul St. Peters Weldon Spring Wentzville West Alton	Map of Missouri highlighting St. Charles County
Villages	Josephville Weldon Spring Heights
Townships	Blanchette Boone Cottleville Dardenne Friedens Frontier Harvester Lindenwood O'Fallon Rivers St. Peters Spencer Creek Wentzville Zumbehl
CDP	Defiance
Other communities	Black Walnut Blase Boschertown Cappeln Elm Point Enon Femme Osage Gilmore Harvester Howell Kampville Klondike Marais Croche Matson Mechanicsville Nona Orchard Farm Pauldingville Peruque Schluersburg Toonerville Whitecorn
Ghost towns	Firma Hamburg Machens Wilkie
Footnotes	‡This populated place also has portions in an adjacent county or counties