City of O’Fallon
O'Fallon is a city in St. Clair County, Illinois, United States. The 2020 census listed the population at 32,289. The city is the second largest city in the Metro East region and Southern Illinois.Places in the Area
Nearby places include Shiloh and Fairview Heights.
Shiloh
Town
Shiloh is a village in St. Clair County, Illinois, United States. Shiloh is situated 2½ miles south of City of O’Fallon.
Fairview Heights
Town
City of O’Fallon
- Type: Locality with 28,300 residents
- Location: St. Clair, Illinois, Midwest, United States, North America
- View on OpenStreetMap
Latitude
38.597° or 38° 35′ 49″ north
Longitude
-89.9149° or 89° 54′ 54″ west
Population
28,300
Elevation
541 feet (165 metres)
Open location code
86CGH3WP+Q2
GeoNames ID
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Places with the Same Name
Discover other places named “City of O’Fallon”.
Localities in the Area
Places to explore: Petersburg and Carbon.
Notable Places Nearby
Highlights: O’Fallon Cemetery and Hesse Park.
Illinois: Must-Visit Destinations
Worth a closer look: Chicago and Springfield.
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