O'Fallon
City in St. Clair County, Illinois
O'Fallon is a city in St. Clair County, Illinois, with 32,289 residents (2020 Census). It sits at 538 ft (164 m) above sea level. The nearest town is Shiloh, 3.8 miles S.
- 32,289residents (2020 Census)
- 538 ftelevation · 164 m
- 16.0 sq miland area · 41.5 km²
- 2,013 / sq mipopulation density
- 62269ZIP code
About 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. 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.
Text: Wikipedia · CC BY-SA 4.0
O'Fallon weather: 7-day forecast
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Source: National Weather Service (NOAA).
Live webcams in O'Fallon
Webcams: Windy.com
Living in O'Fallon
- Median household income
- $105,982
- Median home value
- $295,700
- Median rent
- $1,332/mo
- Median age
- 37.8
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Map of O'Fallon
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Open in Google Maps ›O'Fallon, IL population
O'Fallon had 32,289 residents in the 2020 Census.
| 2020 Census | 32,289 |
|---|---|
| Density | 2,013 per sq mi (777 per km²) |
Source: U.S. Census Bureau, Decennial Census.
O'Fallon at a glance
| State | Illinois (IL) |
|---|---|
| County | St. Clair County |
| Type | City |
| Population | 32,289 (2020) |
| Land area | 16.04 sq mi (41.5 km²) |
| Water area | 0.11 sq mi (0.30 km²) |
| Elevation | 538 ft (164 m) |
| Coordinates | 38.6000° N, 89.9154° W |
| ZIP code | 62269 |
| Official website | ofallon.org |
| Census code (GEOID) | 1755249 |
Sources: U.S. Census Bureau (Gazetteer, ZCTA), USGS GNIS, Wikidata.
Towns near O'Fallon
- Shiloh3.8 mi S
- Fairview Heights4.9 mi W
- Swansea5.1 mi SW
- Scott AFB5.3 mi SE
- Lebanon5.7 mi E
- Caseyville6.7 mi W
- Belleville7.1 mi SW
- Collinsville7.3 mi NW
- Rentchler7.8 mi S
- Mascoutah8.4 mi SE
- Troy8.8 mi N
- Summerfield8.9 mi E
Straight-line distance between town centers.
Frequently asked questions about O'Fallon
What county is O'Fallon in?
O'Fallon is in St. Clair County, Illinois.
What is the population of O'Fallon, IL?
32,289 people lived in O'Fallon at the 2020 Census.
What is the ZIP code of O'Fallon, IL?
The ZIP code of O'Fallon is 62269.
What is the elevation of O'Fallon?
538 feet (164 m) above sea level.
What towns are near O'Fallon?
Shiloh (3.8 mi), Fairview Heights (4.9 mi), Swansea (5.1 mi), Scott AFB (5.3 mi), Lebanon (5.7 mi).
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