gimmedastats
Wednesday, September 2, 2026
Population
96,101
US Census estimate, July 2025
Median home value
$326,200
Owner-occupied units

O'Fallon, MO

Missouri · 38.779° N, 90.722° W · 31 sq mi

O'Fallon is a city in Missouri, with a population of 96,101 and about 3,101 residents per square mile. The median household earns $110,443 a year, and the median home is worth $326,200.

Conditions

Humidity & wind
—
UV index
—
Sunrise & sunset
—
Local time
—
Forgotten Flicks movie T-shirts on TeePublic

Size & density

Land area
31 sq mi
Water excluded
Population density
3,101
People per square mile
Rank by population
#379
Of cities on this site
Rank by area
#447
Of cities on this site

Money & housing

Median household income
$110,443
US median ≈ $78,538
Median gross rent
$1,443
Per month
Homeownership
81%
US ≈ 65%
Average commute
25.5 min
One way

People

Median age
38.4
US median 39.1
Bachelor's degree +
43.3%
Age 25 and over
Foreign born
6.3%
Households
35,471
2.63 people each

Climate · 2021–2025 average

Clear days 35/yr Mostly or fully clear sky
Days with rain 148/yr 0.01 in or more
Days with snow 21/yr
Days above 90° 33/yr
Below freezing 75/yr
Annual rainfall 46.3in Inches per year, scaled to 70 in — the rows above count days
Warmest month
July
Average high 88°F
Coldest month
January
Average low 24°F

What people here do for work

Education & health care 22.1%
Manufacturing 11.8%
Professional & business services 11.5%
Finance, insurance & real estate 11.4%

Top four industries · share of all workers · ACS 2024

Wealthiest person in Missouri

Name
David Steward
Forbes, Apr 2025
Net worth
$11.4B
As of 25 Apr 2025 — not live
Lives in
St. Louis
Source of wealth
IT services

Compiled from public reporting, not from an official dataset, and not independently verified.

Largest employer in Missouri · private sector

Employer
BJC HealthCare
Sector
Healthcare

Compiled from public reporting, not from an official dataset, and not independently verified. Government employers are excluded.

Largest public company in Missouri

Company
Centene
Revenue
$163.1B
Fiscal year 2024
Headquarters
St. Louis
Ticker
CNC

Compiled from public reporting, not from an official dataset, and not independently verified.

State of Missouri

State bird
Eastern Bluebird
State flower
White Hawthorn Blossom
State capital
Jefferson City
Nickname
The Show-Me State

Compare O'Fallon with

Cities near O'Fallon

Cities about the same size

More in Missouri

All Missouri cities →