O'Fallon
A city in St. Charles County, Missouri — population 89,769 as of 2020.
Today
74°F
Scattered Rain Showers65% precip
Tonight
66°F
Chance Rain Showers then Patchy Fog59% precip
Sunday
80°F
Partly Sunny10% precip
Sunday Night
64°F
Mostly Clear1% precip
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O'Fallon by the numbers
Population
89,769Population figure, 2020
Households & income
- Area
- 30.5 sq mi (79 km²), 0 sq mi water
- Median age
- 38.4
- Households
- 35,471
- Persons per household
- 2.6
- Median household income
- $110,443
- Median house value
- $326,200
Municipal office
- Office
- COMMUNICATIONS DIRECTOR
- Address
- 100 N MAIN ST, O FALLON, MO 63366