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CITY · 1990 CENSUS

O'Fallon

Missouri · 18,698 residents · 30.525 sq mi
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The short version

O'Fallon is wealthier than most US places, with a median household income of $36,547. Population has fallen 60% since 2000, a loss of 27,471 residents. 12% of adults hold a bachelor's degree or higher, below the national rate of 20%. Median home value is $70,300. At a median age of 28.8, residents skew younger than the country as a whole. Households here earn about 39% more than the Missouri median.

At a glance
Wealthier
above the US median
US median: $30,130
Younger
median age 28.8
US median: 33.0
Less educated
12% hold a bachelor's degree
US average: 20%
More affordable
home values down 30%, inflation adjusted
US median home: $93,722
Section 01

Population & growth

18,698
−60%vs 2000
vs 46,169 in 2000
1990 – 2025
613 / sq mi
−60%vs 2000
vs 1,512 / sq mi in 2000
US average: 221
28.8
−7%vs 2000
vs 31.1 in 2000
US average: 33.0
Population, 19902024
11K34K56K79K101K1990201020202024O'Fallon
202494K
1990201020202024
Section 02

Income & economy

$36,547
−20%inflation adjusted, since 2000
vs $60,179 in 2000
US average: $30,130
1990 – 2024
$13,336
−39%vs 2000
vs $21,774 in 2000
US average: $14,340
5.1%
+1.7 ptsvs 2000
vs 3.3% in 2000
US average: 13.2%
Section 03

Housing

$70,300
−30%inflation adjusted, since 2000
vs $132,800 in 2000
US average: $93,722
1990 – 2024
$475
+2%inflation adjusted, since 2000
vs $615 in 2000
US average: $450
76.2%
−13.4 ptsvs 2000
vs 89.5% in 2000
23.8% rent
1.9
−13%vs 2000
vs 2.2 in 2000
1990 – 2024
RELATED:See current rent listings in O'Fallon on RentDataNow
Section 04

Race & ethnicity

2000
White, non-Hispanic94.4%(43,576)
Black2.2%(1,029)
Hispanic / Latino1.5%(671)
Asian0.7%(340)
Other0%
Diversity Score10.8%(5,001)
1990
White, non-Hispanic97.6%(18,240)
Black1.1%(206)
Hispanic / Latino1.4%(270)
Asian0.5%(90)
Other0.9%(162)
Diversity Score9.4%(1,750)
9
−14%vs 2000
vs 11 in 2000
1990 – 2024
Section 05

Education

12.4%
−14.8 ptsvs 2000
vs 27.2% in 2000
US average: 20.3%
High school or higher
79.7%
−10.8 ptsvs 2000
vs 90.4% in 2000
US average: 75.2%
3.5%
−3.5 ptsvs 2000
vs 7.0% in 2000
US average: 7.1%
Section 06

Commute & transportation

23.4 min
+19%vs 2000
vs 19.6 min in 2000
US average: 21.9
Section 07

Work & employment

No data for the years selected.

Section 08

People & community

No data for the years selected.

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Frequently asked

How many people live in O'Fallon, Missouri?

O'Fallon, Missouri has about 18,698 residents according to the 1990 Census.

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

The typical household in O'Fallon, Missouri earns about $36,547 a year. Half of households make more than that, and half make less.

Is O'Fallon, Missouri expensive?

In O'Fallon, Missouri, the median home is worth about $70,300, and the typical rent is about $475 a month.

How educated are people in O'Fallon, Missouri?

About 12.4% of adults age 25 and over in O'Fallon, Missouri hold a bachelor's degree or higher.

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

About 5.1% of people in O'Fallon, Missouri live below the federal poverty line.

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

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