O'Fallon
City in St. Charles County, Missouri
O'Fallon is a city in St. Charles County, Missouri, with 91,316 residents (2020 Census). It sits at 541 ft (165 m) above sea level. The nearest town is Dardenne Prairie, 2.6 miles S.
- 91,316residents (2020 Census)
- 541 ftelevation · 165 m
- 31.0 sq miland area · 80.3 km²
- 2,947 / sq mipopulation density
- 63368main ZIP code (2 in total)
About O'Fallon
O'Fallon ( oh-FAL-ən) is a city in St. Charles County, Missouri, United States. It is part of the St. Louis metropolitan statistical area, along Interstates 64 and 70 between Lake St. Louis and St. Peters. As of the 2020 census, O'Fallon had a population of 91,316, making it St. Louis's most populous suburb as well as the most populous municipality in St. Charles County and the 7th-most populous in Missouri. O'Fallon's namesake in St. Clair County, Illinois, is also part of the St. Louis region. The two cities are one of the few pairs of same-named municipalities to be part of the same metro area.
Text: Wikipedia · CC BY-SA 4.0
O'Fallon weather: 7-day forecast
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Living in O'Fallon
- Median household income
- $110,443
- Median home value
- $326,200
- Median rent
- $1,443/mo
- Median age
- 38.4
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Map of O'Fallon
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Open in Google Maps ›O'Fallon, MO population
O'Fallon had 91,316 residents in the 2020 Census.
| 2020 Census | 91,316 |
|---|---|
| Density | 2,947 per sq mi (1,138 per km²) |
Source: U.S. Census Bureau, Decennial Census.
O'Fallon at a glance
| State | Missouri (MO) |
|---|---|
| County | St. Charles County |
| Type | City |
| Population | 91,316 (2020) |
| Land area | 30.99 sq mi (80.3 km²) |
| Water area | 0.00 sq mi (0.01 km²) |
| Elevation | 541 ft (165 m) |
| Coordinates | 38.7788° N, 90.7218° W |
| ZIP codes | 63368, 63367 |
| Official website | ofallon.mo.us |
| Census code (GEOID) | 2954074 |
Sources: U.S. Census Bureau (Gazetteer, ZCTA), USGS GNIS, Wikidata.
Towns near O'Fallon
- Dardenne Prairie2.6 mi S
- Lake St. Louis3.4 mi W
- Cottleville3.9 mi SE
- St. Paul4.9 mi N
- Josephville5.1 mi NW
- Weldon Spring Heights5.5 mi S
- Weldon Spring6.1 mi SE
- St. Peters6.3 mi E
- Wentzville8.2 mi W
- Flint Hill9.9 mi NW
- New Melle10.0 mi SW
- Chain of Rocks10.4 mi NW
Straight-line distance between town centers.
Frequently asked questions about O'Fallon
What county is O'Fallon in?
O'Fallon is in St. Charles County, Missouri.
What is the population of O'Fallon, MO?
91,316 people lived in O'Fallon at the 2020 Census.
What is the ZIP code of O'Fallon, MO?
The main ZIP code is 63368. Other ZIP codes: 63367.
What is the elevation of O'Fallon?
541 feet (165 m) above sea level.
What towns are near O'Fallon?
Dardenne Prairie (2.6 mi), Lake St. Louis (3.4 mi), Cottleville (3.9 mi), St. Paul (4.9 mi), Josephville (5.1 mi).
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