O'Fallon, Missouri Population 2021

89,291
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O'Fallon is a city located in Missouri. With a 2020 population of 89,291, it is the 7th largest city in Missouri and the 382nd largest city in the United States . O'Fallon is currently growing at a rate of 0.35% annually and its population has increased by 12.56% since the most recent census, which recorded a population of 79,329 in 2010. O'Fallon reached it's highest population of in . Spanning over 30 miles, O'Fallon has a population density of 2,998 people per square mile.

The average household income in O'Fallon is $108,521 with a poverty rate of 4.45%. The median rental costs in recent years comes to $1,103 per month, and the median house value is $226,300. The median age in O'Fallon is 37 years, 35 years for males, and 38.7 years for females.

O'Fallon Demographics

According to the most recent ACS, the racial composition of O'Fallonwas:

  • White: 88.86%
  • Black or African American: 4.61%
  • Asian: 3.41%
  • Two or more races: 2.56%
  • Other race: 0.41%
  • Native American: 0.12%
  • Native Hawaiian or Pacific Islander: 0.03%
The current population of O'Fallon, Missouri is 89,291 based on our projections of the latest US Census estimates. The US Census estimates the 2018 population at 88,673.The last official US Census in 2010 recorded the population at 79,329.

O'Fallon, Missouri Population 2021

Population by Race

Race Population Percentage
White77,52388.86%
Black or African American4,0254.61%
Asian2,9753.41%
Two or More Races2,2372.56%
Some Other Race3570.41%
American Indian and Alaska Native1010.12%
Native Hawaiian and Other Pacific Islander240.03%
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O'Fallon Population by Race

O'Fallon Population Pyramid $2021

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O'Fallon Median Age

37


Total

35


Male

38.7


Female

O'Fallon Adults

There are 63,601 adults, (10,475 of whom are seniors) in O'Fallon.

O'Fallon Age Dependency

64.2

Age Dependency Ratio

19.7

Old Age Dependency Ratio

44.5

Child Dependency Ratio

O'Fallon Sex Ratio

Female

43,818

50.23%

Male

43,424

49.77%

O'Fallon Population by Age

O'Fallon Renter vs Owner Occupied by Household Type

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O'Fallon Household Types

Type Owner Renter
Non Family63.7%36.3%
Female66.2%33.8%
Male80.1%19.9%
All82.2%17.8%
Married92.6%7.4%

82.2%

Rate of Home Ownership

O'Fallon Households and Families

Type Count Average Size Owned
All30,9782.882.2
Married18,7763.3592.6
Non Family7,5241.2363.7
Female3,3813.1766.2
Male1,2973.0580.1

3.24

Average Family Size

2.8

Average Household Size

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O'Fallon Households by Type

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Education Attained Count Percentage
Less Than 9th Grade4660.82%
9th to 12th Grade1,8683.27%
High School Graduate13,54823.70%
Some College12,71522.24%
Associates Degree4,8118.42%
Bachelors Degree14,98926.22%
Graduate Degree8,76415.33%
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O'Fallon Educational Attainment by Sex (over 25)

O'Fallon Educational Attainment by Race

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Race Total High School Bachelors
White50,40248,35920,251
Black2,6612,5511,348
Asian2,0361,9451,461
Hispanic1,4201,330509
2+ Races685685246
Other Race21316441
Native American10110133
Islander2424

The highest rate of high school graduation is among native american people with a rate of 100.00%.

The highest rate of bachelors degrees is among asian people with a rate of 71.76%.

O'Fallon Educational Attainment by Race

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Name Average Male Female
Overall$51,774$64,107$40,771
Less Than 9th Grade$27,325$40,625$21,262
High School Graduate$36,567$45,325$29,045
Some College$43,898$54,146$34,081
Bachelors Degree$63,161$86,409$47,500
Graduate Degree$72,809$98,064$60,724

$51,774

Average Earnings

$64,107

Average Male

$40,771

Average Female

O'Fallon Earnings by Educational Attainment

O'Fallon Language by Age

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O'Fallon Language

94.05% of O'Fallon residents speak only English, while 5.95% speak other languages. The non-English language spoken by the largest group is Spanish, which is spoken by 2.18% of the population.

O'Fallon Language

O'Fallon Poverty by Race

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Name Total In Poverty Poverty Rate
White74,8252,4673.30%
Black3,99254613.68%
Multiple2,23753423.87%
Hispanic2,7072007.39%
Asian2,9751003.36%
Other3577420.73%
Native10165.94%

4.45%

Overall Poverty Rate

3.64%

Male Poverty Rate

5.24%

Female Poverty Rate

Poverty in O'Fallon

The race most likely to be in poverty in O'Fallon is Multiple, with 23.87% below the poverty level.

The race least likely to be in poverty in O'Fallon is White, with 3.30% below the poverty level.

The poverty rate among those that worked full-time for the past 12 months was 0.91%. Among those working part-time, it was 7.92%, and for those that did not work, the poverty rate was 7.62%.

O'Fallon Poverty

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Name Poverty
Less Than 9th Grade12.44%
High School5.27%
Some College3.83%
Bachelors or Greater1.03%

O'Fallon Poverty Rate by Education

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Rate Poverty
Female Unemployed18.98%
Male Unemployed11.64%
Female Employed3.36%
Male Employed1.50%

O'Fallon Poverty Rate by Employment Status and Sex

O'Fallon Income by Household Type

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Name Median Mean
Households$90,025$108,521
Families$105,231$121,478
Married Families$116,741$133,907
Non Families$48,744$62,521
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Income by Household Type

O'Fallon Marital Status

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Marriage Rates

57.2%

Overall Marriage Rate

58.9%

Male Marriage Rate

55.7%

Female Marriage Rate

O'Fallon Married by Age and Sex

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O'Fallon Marriage

The age group where males are most likely to be married is 45-54, while the female age group most likely to be married is 45-54.

O'Fallon Marital Status by Race

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O'Fallon Marital Status

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4,725

Number of Veterans

4,471

Male Veterans

254

Female Veterans

War Veterans
Vietnam1,575
Second Gulf War920
First Gulf War910
Korea374
World War II195

O'Fallon Veterans by War

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Age Group Veterans
35 to 541,195
75+1,153
65 to 741,075
55 to 64854
18 to 34448

O'Fallon Veterans by Age

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Name Veterans % of Total
White4,3667.64%
Black2879.74%
Hispanic745.12%
2+ Races444.66%
Other Race187.73%
Asian100.49%

O'Fallon Veterans by Race

O'Fallon Veterans by Education

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1.07%

Veteran Poverty Rate

25.75%

Veteran Disability Rate

O'Fallon Veterans by Education

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72.8%

Labor Force Participation

70.6%

Employment Rate

2.8%

Unemployment Rate

O'Fallon Employment by Age

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O'Fallon Employment by Race

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O'Fallon Employment by Education

Origin of Non-Citizens

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Non citizens include legal permanent residents (green card holders), international students, temporary workers, humanitarian migrants, and illegal immigrants.

Origin of Naturalized Citizens

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69.73%

Born in O'Fallon

95.86%

Native Born

4.14%

Foreign Born

2.08%

Non Citizen

2.06%

Naturalized

Place of Birth

95.86% of O'Fallon residents were born in the United States, with 69.73% having been born in Missouri. 2.08% of residents are not US citizens. Of those not born in the United States, the largest percentage are from Asia.

O'Fallon Place of Birth

Note: 2020 and 2021 data is projected
Year Population Growth Annual Growth Rate
202189,2913090.35%
202088,9823090.35%
201988,6733090.35%
201888,3648410.96%
201787,5231,0741.24%
201686,4491,3881.63%
201585,0618401.00%
201484,2211,0851.31%
201383,1361,0001.22%
201282,1369521.17%
201181,1841,2201.53%
201079,96433,7955.65%
200046,16927,4719.46%
199018,69810,0217.98%
19808,6771,6592.14%
19707,0183,2486.41%
19603,7703,1709.62%
19406000.00%

O'Fallon Population by Year