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CITY · 2020 ACS

O'Fallon

Illinois · 32,289 residents · 15.791 sq mi
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The short version

O'Fallon is significantly wealthier than the US average, with a median household income of $90,432. Population has grown 47% since 2000. 50% of adults hold a bachelor's degree or higher, well above the national rate of 33%. Median home value has more than doubled since 2000, reaching $214,600. Poverty is rare here, at 4.0% of residents. Households here earn about 32% more than the Illinois median.

At a glance
Wealthier
above the US median
US median: $66,278
Mid-age
median age 38.0
US median: 38.8
More educated
50% hold a bachelor's degree
US average: 33%
Less affordable
home values up 28%, inflation adjusted
US median home: $265,253
Section 01

Population & growth

Total population
32,289
+47%since 2000
from 21,910 in 2000
1990 – 2025
Population density
2,045 / sq mi
+47%since 2000
from 1,387 / sq mi in 2000
US average: 280
Median age
38.0
+8%since 2000
from 35.3 in 2000
US average: 38.8
Population, 1990 – 2024
14K19K24K29K34K1990201020202024O'Fallon
202432K
1990201020202024
Section 02

Income & economy

Median household income
$90,432
+8%inflation adjusted, since 2000
from $55,927 in 2000
US average: $66,278
1990 – 2024
Per capita income
$43,316
+75%since 2000
from $24,821 in 2000
US average: $35,364
Households earning $100K+
56.6%
+10.6 ptssince 2009
from 46.0% in 2009
US average: 43.9%
Poverty rate
4.0%
−1.0 ptssince 2000
from 5.0% in 2000
US average: 12.8%
Workforce by industry, 2020
Information11.7%
US avg: 11.1%
Other services7.5%
US avg: 6.6%
Finance & insurance7.3%
US avg: 5.5%
Retail trade6.2%
US avg: 10%
Professional, scientific, technical5.9%
US avg: 4.7%
Public administration4.4%
US avg: 4.7%
Wholesale trade3%
US avg: 6.7%
Transportation & warehousing2%
US avg: 2.5%
Arts, entertainment, food2%
US avg: 2%
Education & health services1.4%
US avg: 0.8%
Agriculture, forestry, fishing0.7%
US avg: 1.7%
Manufacturing0.6%
US avg: 0.5%
Construction0.1%
US avg: 1.2%
BARS: THIS PLACE · TICKS: US AVERAGE
Section 03

Housing

Median home value
$214,600
+28%inflation adjusted, since 2000
from $111,800 in 2000
US average: $265,253
1990 – 2024
Median gross rent
$1,134
+14%inflation adjusted, since 2000
from $660 in 2000
US average: $1,124
Owner-occupied
68.0%
−0.7 ptssince 2000
from 68.7% in 2000
32.0% rent
Afford Score
2.4
+19%since 2000
from 2.0 in 2000
1990 – 2024
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)
2020
White, non-Hispanic69.2%(22,344)
Black16.1%(5,200)
Hispanic / Latino5%(1,629)
Asian2.7%(873)
Other5%(1,617)
Diversity Score58.6%(18,931)
Diversity Score
59
+60%since 2000
from 37 in 2000
1990 – 2024
Section 05

Education

Bachelor's degree or higher
49.7%
+10.9 ptssince 2000
from 38.7% in 2000
US average: 32.9%
High school or higher
97.1%
+4.8 ptssince 2000
from 92.3% in 2000
US average: 88.5%
Graduate degree
21.4%
+4.4 ptssince 2000
from 17.0% in 2000
US average: 12.7%
Section 06

Commute & transportation

Average commute
24.9 min
+61%since 2000
from 15.4 min in 2000
US average: 26.9
Drive alone to work
86.3%
−0.7 ptssince 2009
from 87.1% in 2009
US average: 75.1%
No vehicle available
4.6%
−0.1 ptssince 2009
from 4.7% in 2009
US average: 8.4%
Section 07

Work & employment

Unemployment rate
3.5%
−4.5 ptssince 2011
from 8.0% in 2011
US average: 5.4%
Labor force participation
68.5%
−3.0 ptssince 2011
from 71.5% in 2011
US average: 63.4%
Management & professional
50.5%
−21.2 ptssince 2009
from 71.7% in 2009
US average: 39.3%
Section 08

People & community

Male
47.8%
−1.6 ptssince 2009
from 49.4% in 2009
Female
52.2%
+1.6 ptssince 2009
from 50.6% in 2009
Foreign born
4.6%
+0.6 ptssince 2009
from 4.0% in 2009
US average: 13.5%
Uninsured
3.5%
−91.4 ptssince 2013
from 94.9% in 2013
US average: 8.8%
Drill deeper

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Head to head

Compare O'Fallon to nearby cities

O'FALLON VS
Shiloh
Income$99,573+10%
Home value$274,000+28%
Population14,604−55%
SEE FULL COMPARISON →
O'FALLON VS
Fairview Heights
Income$80,930−11%
Home value$177,700−17%
Population16,175−50%
SEE FULL COMPARISON →
O'FALLON VS
Swansea
Income$91,587+1%
Home value$223,600+4%
Population14,356−56%
SEE FULL COMPARISON →
O'FALLON VS
Belleville
Income$63,535−30%
Home value$141,300−34%
Population40,237+23%
SEE FULL COMPARISON →
Frequently asked

How many people live in O'Fallon, Illinois?

O'Fallon, Illinois has about 32,289 residents according to the 2020 American Community Survey.

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

The typical household in O'Fallon, Illinois earns about $90,432 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 $214,600, and the typical rent is about $1,134 a month.

How educated are people in O'Fallon, Illinois?

About 49.7% 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 4.0% 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 16,216 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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