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O'Fallon
Sign in to saveAlso known as O'Fallon, Illinois, O'Fallon, IL
city in St. Clair County, Illinois, United States
Key facts
- Country
- United States
- State
- Illinois
- County
- St. Clair
- Township
- O'Fallon
- Type
- Home rule
- Total
- 15.70 sq mi (40.67 km )
- Land
- 15.59 sq mi (40.39 km )
- Water
- 0.11 sq mi (0.29 km )
- Elevation
- 538 ft (164 m)
- Density
- 2,070.6/sq mi (799.48/km )
- Time zone
- UTC−6 ( CST )
- Summer dst
- UTC−5 ( CDT )
- Fips code
- 17-55249
- Website
- ofallon .org
via Wikipedia infobox
Wikidata facts
- Official name
- O'Fallon
- Population
- 32289
- Area
- 37.491847
- Elevation
- 164
- Official website
- www.ofallon.org
- Image
- Caboose.JPG
- Households
- 11493
- Dialing code
- 618
Show 7 more facts
- Commons category
- O'Fallon, Illinois
- Commons gallery
- O'Fallon, Illinois
- postal code
- 62269
- inception
- 1854-01-01
- P8168
- Ermont
- water as percent of area
- 0.8397
- per capita income
- 43316
Sources (9)
via Wikidata · CC0
~6 min read
Article
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. It sits 5 miles (8.0 km) from Scott Air Force Base and 18 miles (29 km) from Downtown St. Louis.
Like its namesake in St. Charles County, Missouri, O'Fallon is part of the St. Louis metro area. This makes O'Fallon (along with the two Troys in Illinois and Missouri) one of the few pairs of like-named municipalities to be part of the same metro region.
Gallery (12)
On the map
2 mapped locations