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O'Fallon, IL

City in St. Clair County, Illinois. ZIP codes: 62269.

Population

32,262

Land area

15.8sq mi

People per sq mi

2,041

ZIP codes

1

O'Fallon and its ZIP codes

Full map

O'Fallon at a glance

  • O'Fallon is about 8.9 times as dense as Illinois as a whole.
  • It is the 58th most populous of 1,445 cities and towns in Illinois.
  • Households here earn a median of $105,982 a year, 27% more than the Illinois figure of $83,390.
  • A typical owner-occupied home is valued at $295,700 (12% above Illinois) and median rent is $1,332 a month.

Local data for O'Fallon, IL

Counts from official public data

Housing and community stats

O'Fallon, IL, American Community Survey 2020-2024

Full profile

Median household income

$105,982

Poverty rate

6.2%

Median home value

$295,700

Median rent

$1,332/mo

Homeownership

70.2%

Bachelor's or higher

52.4%

Median age

37.8

Average commute

25.3 min

Largest reported origins and ancestries: German Americans (7,577), Irish Americans (3,419), Polish Americans (1,371).

Home values and rentsIncome, education and commute

Economy and federal money

Jobs, pay, income and spending are for St. Clair County. PPP loans are for O'Fallon.

Details

Unemployment rate

3.8%

Sep 2026, -0.8 pts in a year

Average annual pay

$59,034

89,192 jobs, 2025

Income per person

$61,712

BEA, 2024

Federal spending

$2.6B

FY 2026, $10,147 per person

PPP loans

$69.6M

1,078 loans, 7,963 jobs reported

St. Clair County economyFederal spendingPPP loans

How people get to work

O'Fallon, IL, workers 16 and older. American Community Survey 5-year estimates

  • Drove alone70.5%
  • Carpooled6.1%
  • Public transit0.5%
  • Walked2.2%
  • Bicycle0.0%
  • Taxi, ride-hailing, motorcycle or other0.3%
  • Worked from home20.4%

Average one-way commute: 25.3 minutes for people who do not work from home.

Environment and hazard risk

O'Fallon, IL, from FEMA, NOAA and EPA

Full report

Natural hazard risk

Relatively High

Top: heat wave

Storm events since 1996

829

Countywide, mostly thunderstorm wind

Flood insurance policies

1,007

1.0% of homes, county

July high / Jan low

90° / 24°F

43.4 inches of rain a year

Hazards, floods and storm historyCheck a flood zone

Health statistics

Share of adults in O'Fallon, IL, CDC PLACES estimates

All 40 measures

Obesity

34.1%

U.S. 33.3% +0.8 pts

Diabetes

9.7%

U.S. 12.1% -2.4 pts

Smoking

10.4%

U.S. 12.8% -2.4 pts

Uninsured (18-64)

5.4%

U.S. 11.1% -5.7 pts

ZIP codes in O'Fallon

1 in or overlapping O'Fallon. Population shown

·

Cities near O'Fallon

NameDistanceLand area (sq mi)
ShilohVillage4.2 mi12.5
Scott AFBCensus-designated place5.1 mi4.3
SwanseaVillage5.1 mi6.5
Fairview HeightsCity5.2 mi11.5
LebanonCity6 mi2.7
CaseyvilleVillage7.1 mi7.3
BellevilleCity7.2 mi23.2
CollinsvilleCity7.3 mi15.4
RentchlerCensus-designated place7.6 mi0.3
MascoutahCity7.9 mi9.6
TroyCity8.6 mi6.2
SummerfieldVillage8.9 mi0.5
MaryvilleVillage9.6 mi5.8
Washington ParkVillage9.9 mi2.6
FreeburgVillage11 mi6.8
Fairmont CityVillage11 mi6.2

Frequently asked questions

What county is O'Fallon, IL in?
O'Fallon is in St. Clair County, Illinois.
What ZIP codes are in O'Fallon, IL?
ZIP codes in or overlapping O'Fallon include 62269.
What is the population of O'Fallon, IL?
About 32,262 people live in O'Fallon, based on American Community Survey 5-year estimates.
What cities are near O'Fallon?
Nearby places include Shiloh (4.2 mi), Scott AFB (5.1 mi), Swansea (5.1 mi), Fairview Heights (5.2 mi), Lebanon (6 mi).

Source: U.S. Census Bureau (TIGER/Line boundaries, American Community Survey) · Data as of 12/31/2023

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