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CITY

O'Fallon

Illinois · 32,656 residents (2025 est.) · 15.791 sq mi
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The short version

O'Fallon is wealthier than most US places, with a median household income of $105,982. Population has grown 47% since 2000. 52% of adults hold a bachelor's degree or higher, well above the national rate of 36%. Median home value has more than doubled since 2000, reaching $295,700. Poverty is rare here, at 6.2% of residents. It sits in the top 10% of US cities for household income.

At a glance
Wealthier
above the US median
US median: $82,259
Mid-age
median age 37.8
US median: 38.9
More educated
52% hold a bachelor's degree
US average: 36%
Less affordable
home values up 45%, inflation adjusted
US median home: $376,019
Section 01

Population & growth

Total population
32,262
+47%since 2000
from 21,910 in 2000
1990 – 2025
Population density
2,043 / sq mi
+47%since 2000
from 1,387 / sq mi in 2000
US average: 281
Median age
37.8
+7%since 2000
from 35.3 in 2000
US average: 38.9

PEP 2025 EST:32,656 residents (Census Bureau Vintage 2025, released March 2026)

Population, 1990 – 2024
14K19K24K29K34K1990201020202024O'Fallon
202432K
1990201020202024
Section 02

Income & economy

Median household income
$105,982
+4%inflation adjusted, since 2000
from $55,927 in 2000
US average: $82,259
1990 – 2024
Per capita income
$54,265
+119%since 2000
from $24,821 in 2000
US average: $44,673
Households earning $100K+
63.1%
+17.1 ptssince 2009
from 46.0% in 2009
US average: 53.3%
Poverty rate
6.2%
+1.3 ptssince 2000
from 5.0% in 2000
US average: 12.5%
Income inequality (Gini)
0.445
+13%since 2010
from 0.393 in 2010
US average: 0.476
Workforce by industry, 2024
Information8.3%
US avg: 10.8%
Other services7.7%
US avg: 6.7%
Finance & insurance6.4%
US avg: 5.9%
Retail trade5.9%
US avg: 9.9%
Professional, scientific, technical5.5%
US avg: 5.1%
Public administration5%
US avg: 4.8%
Wholesale trade2.8%
US avg: 6.9%
Arts, entertainment, food1.8%
US avg: 1.9%
Transportation & warehousing0.9%
US avg: 2.2%
Education & health services0.9%
US avg: 0.9%
Agriculture, forestry, fishing0.5%
US avg: 1.6%
Construction0.3%
US avg: 1.2%
Manufacturing0.1%
US avg: 0.4%
BARS: THIS PLACE · TICKS: US AVERAGE
Section 03

Housing

Median home value
$295,700
+45%inflation adjusted, since 2000
from $111,800 in 2000
US average: $376,019
1990 – 2024
Median gross rent
$1,332
+11%inflation adjusted, since 2000
from $660 in 2000
US average: $1,442
Owner-occupied
70.2%
+1.5 ptssince 2000
from 68.7% in 2000
29.8% rent
Vacancy rate
5.3%
Unchangedsince 2009
from 5.3% in 2009
US average: 10.0%
Owner cost-burdened
16.5%
−4.6 ptssince 2009
from 21.2% in 2009
US average: 22.9%
Renter cost-burdened
45.5%
+9.4 ptssince 2009
from 36.1% in 2009
US average: 47.4%
Afford Score
2.8
+40%since 2000
from 2.0 in 2000
1990 – 2024
Gentrification Score
50
RELATED:See current rent listings in O'Fallon on RentDataNow
Section 04

Race & ethnicity

2000
White, non-Hispanic81.4%(17,831)
Black11.9%(2,603)
Hispanic / Latino2.2%(488)
Asian2.4%(535)
Other0%
Diversity Score36.7%(8,040)
2024
White, non-Hispanic69.4%(22,382)
Black16.5%(5,335)
Hispanic / Latino5.1%(1,661)
Asian2.6%(833)
Other6.4%(2,051)
Diversity Score60.5%(19,518)
Diversity Score
60
+65%since 2000
from 37 in 2000
1990 – 2024
Section 05

Education

Bachelor's degree or higher
52.4%
+13.6 ptssince 2000
from 38.7% in 2000
US average: 35.6%
High school or higher
97.6%
+5.4 ptssince 2000
from 92.3% in 2000
US average: 89.6%
Graduate degree
23.4%
+6.4 ptssince 2000
from 17.0% in 2000
US average: 14.0%
Section 06

Commute & transportation

Average commute
25.3 min
+64%since 2000
from 15.4 min in 2000
US average: 26.5
Drive alone to work
70.5%
−16.5 ptssince 2009
from 87.1% in 2009
US average: 68.9%
Carpooled to work
6.1%
−0.8 ptssince 2009
from 6.9% in 2009
US average: 8.5%
Public transit
0.5%
−0.8 ptssince 2009
from 1.2% in 2009
US average: 3.2%
Worked from home
20.4%
+17.0 ptssince 2009
from 3.4% in 2009
US average: 15.0%
Walked to work
2.2%
+1.2 ptssince 2009
from 1.0% in 2009
US average: 2.4%
Biked to work
0.0%
−0.1 ptssince 2009
from 0.1% in 2009
US average: 0.4%
No vehicle available
5.9%
+1.2 ptssince 2009
from 4.7% in 2009
US average: 8.3%
Section 07

Work & employment

Unemployment rate
3.7%
−4.3 ptssince 2011
from 8.0% in 2011
US average: 5.2%
Labor force participation
65.8%
−5.7 ptssince 2011
from 71.5% in 2011
US average: 63.5%
Self-employed
12.9%
+2.3 ptssince 2009
from 10.5% in 2009
US average: 13.1%
Management & professional
54.4%
−17.3 ptssince 2009
from 71.7% in 2009
US average: 42.5%
Section 08

People & community

Male
49.5%
+0.1 ptssince 2009
from 49.4% in 2009
Female
50.5%
−0.1 ptssince 2009
from 50.6% in 2009
Foreign born
3.8%
−0.2 ptssince 2009
from 4.0% in 2009
US average: 14.1%
Veterans
20.2%
−25.8 ptssince 2009
from 46.1% in 2009
US average: 6.2%
With a disability
10.8%
+1.2 ptssince 2012
from 9.6% in 2012
US average: 13.3%
Uninsured
4.0%
−90.9 ptssince 2013
from 94.9% in 2013
US average: 8.4%
Broadband at home
94.5%
+8.9 ptssince 2017
from 85.6% in 2017
US average: 91.0%
English only at home
94.8%
+1.1 ptssince 2016
from 93.7% in 2016
US average: 77.7%
Spanish at home
2.1%
+0.3 ptssince 2016
from 1.8% in 2016
US average: 13.6%
Drill deeper

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Compare O'Fallon to nearby cities

O'FALLON VS
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Income$99,573−6%
Home value$274,000−7%
Population14,604−55%
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O'FALLON VS
Fairview Heights
Income$80,930−24%
Home value$177,700−40%
Population16,175−50%
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O'FALLON VS
Swansea
Income$91,587−14%
Home value$223,600−24%
Population14,356−56%
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O'FALLON VS
Belleville
Income$63,535−40%
Home value$141,300−52%
Population40,237+23%
SEE FULL COMPARISON →
Frequently asked

How many people live in O'Fallon, Illinois?

O'Fallon, Illinois has about 32,262 residents according to the 2024 American Community Survey.

What is the median household income in O'Fallon, Illinois?

The typical household in O'Fallon, Illinois earns about $105,982 a year. Half of households make more than that, and half make less.

Is O'Fallon, Illinois expensive?

In O'Fallon, Illinois, the median home is worth about $295,700, and the typical rent is about $1,332 a month.

How educated are people in O'Fallon, Illinois?

About 52.4% of adults age 25 and over in O'Fallon, Illinois hold a bachelor's degree or higher.

What is the poverty rate in O'Fallon, Illinois?

About 6.2% of people in O'Fallon, Illinois live below the federal poverty line.

Has O'Fallon, Illinois grown since 1990?

Yes, O'Fallon, Illinois has grown since 1990. The population has added about 16,189 residents, a change of about 101 percent over that period.

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DATA: US CENSUS BUREAU ACS 5-YEAR + DECENNIAL CENSUS · UPDATED 2024

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