O'Fallon is a populated place located in St. Clair County, Illinois. It appears on the O'Fallon USGS 7.5-minute topographic quadrangle. The elevation at this location is approximately 538.06 feet (164.00 m) above sea level.
St. Clair County · Illinois
O'Fallon is a populated place located in St. Clair County, Illinois. It appears on the O'Fallon USGS 7.5-minute topographic quadrangle. The elevation at this location is approximately 538.06 feet (164.00 m) above sea level.