World Population Review
O'Fallon, Illinois Population 2021
29,635
O'Fallon is a city located in Illinois. With a 2020 population of 29,635, it is the 65th largest city in Illinois and the 1305th largest city in the United States . O'Fallon is currently growing at a rate of 0.09% annually and its population has increased by 4.79% since the most recent census, which recorded a population of 28,281 in 2010. O'Fallon reached it's highest population of 29,635 in 2021. Spanning over 15 miles, O'Fallon has a population density of 1,929 people per square mile.
The average household income in O'Fallon is $105,152 with a poverty rate of 4.28%. The median rental costs in recent years comes to $1,066 per month, and the median house value is $207,900. The median age in O'Fallon is 36.7 years, 35.5 years for males, and 38 years for females.
O'Fallon Demographics
According to the most recent ACS, the racial composition of O'Fallon was:
- White: 79.48%
- Black or African American: 11.76%
- Two or more races: 4.12%
- Asian: 3.09%
- Other race: 1.44%
- Native American: 0.11%
- Native Hawaiian or Pacific Islander: 0.00%
The current population of O'Fallon, Illinois is 29,635 based on our projections of the latest US Census estimates. The US Census estimates the 2018 population at 29,557.The last official US Census in 2010 recorded the population at 28,281.
O'Fallon, Illinois Population 2021
| Race | Population | Percentage |
|---|---|---|
| White | 23,313 | 79.48% |
| Black or African American | 3,450 | 11.76% |
| Two or More Races | 1,209 | 4.12% |
| Asian | 907 | 3.09% |
| Some Other Race | 423 | 1.44% |
| American Indian and Alaska Native | 31 | 0.11% |
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O'Fallon Population by Race
O'Fallon Population Pyramid $2021
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O'Fallon Population by Age
O'Fallon Households and Families
| Type | Count | Average Size | Owned |
|---|---|---|---|
| All | 10,974 | 2.67 | 69.2 |
| Married | 6,437 | 3.23 | 83.6 |
| Non Family | 2,929 | 1.13 | 46.5 |
| Female | 1,148 | 3.27 | 46.3 |
| Male | 460 | 3.25 | 68.7 |
3.18
Average Family Size
2.67
Average Household Size
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O'Fallon Households by Type
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| Education Attained | Count | Percentage |
|---|---|---|
| Less Than 9th Grade | 213 | 1.11% |
| 9th to 12th Grade | 391 | 2.03% |
| High School Graduate | 2,991 | 15.52% |
| Some College | 4,208 | 21.84% |
| Associates Degree | 2,251 | 11.68% |
| Bachelors Degree | 4,875 | 25.30% |
| Graduate Degree | 4,339 | 22.52% |
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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 |
|---|---|---|---|
| White | 15,289 | 14,934 | 7,610 |
| Black | 2,164 | 2,068 | 814 |
| Hispanic | 852 | 812 | 337 |
| Asian | 597 | 484 | 300 |
| 2+ Races | 412 | 398 | 177 |
| Other Race | 275 | 275 | 96 |
| Native American | 18 | 18 |
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 50.25%.
O'Fallon Educational Attainment by Race
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$54,180
Average Earnings
$69,410
Average Male
$39,322
Average Female
O'Fallon Earnings by Educational Attainment
O'Fallon Language by Age
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O'Fallon Language
92.89% of O'Fallon residents speak only English, while 7.11% speak other languages. The non-English language spoken by the largest group is Spanish, which is spoken by 2.49% of the population.
O'Fallon Language
O'Fallon Poverty by Race
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| Name | Total | In Poverty | Poverty Rate |
|---|---|---|---|
| White | 22,309 | 847 | 3.80% |
| Black | 3,439 | 287 | 8.35% |
| Multiple | 1,166 | 99 | 8.49% |
| Hispanic | 1,436 | 26 | 1.81% |
| Asian | 907 | 17 | 1.87% |
4.28%
Overall Poverty Rate
4.09%
Male Poverty Rate
4.47%
Female Poverty Rate
Poverty in O'Fallon
The race most likely to be in poverty in O'Fallon is Multiple, with 8.49% below the poverty level.
The race least likely to be in poverty in O'Fallon is Hispanic, with 1.81% below the poverty level.
The poverty rate among those that worked full-time for the past 12 months was 0.95%. Among those working part-time, it was 9.99%, and for those that did not work, the poverty rate was 5.78%.
O'Fallon Poverty
O'Fallon Poverty Rate by Education
O'Fallon Marital Status
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Marriage Rates
58.8%
Overall Marriage Rate
60.3%
Male Marriage Rate
57.4%
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 55-64, while the female age group most likely to be married is 55-64.
O'Fallon Marital Status by Race
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O'Fallon Marital Status
O'Fallon Veterans by War
O'Fallon Veterans by Age
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| Name | Veterans | % of Total |
|---|---|---|
| White | 3,119 | 18.75% |
| Black | 356 | 14.25% |
| 2+ Races | 125 | 26.37% |
| Hispanic | 57 | 6.54% |
| Native American | 8 | 44.44% |
| Asian | 7 | 1.17% |
O'Fallon Veterans by Race
O'Fallon Veterans by Education
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1.44%
Veteran Poverty Rate
16.29%
Veteran Disability Rate
O'Fallon Veterans by Education
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69.2%
Labor Force Participation
62.3%
Employment Rate
4.5%
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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95.50%
Native Born
4.50%
Foreign Born
1.79%
Non Citizen
2.71%
Naturalized
Place of Birth
95.50% of O'Fallon residents were born in the United States, with 47.67% having been born in Illinois. 1.79% 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
| Year | Population | Growth | Annual Growth Rate |
|---|---|---|---|
| 2021 | 29,635 | 26 | 0.09% |
| 2020 | 29,609 | 26 | 0.09% |
| 2019 | 29,583 | 26 | 0.09% |
| 2018 | 29,557 | 237 | 0.81% |
| 2017 | 29,320 | 167 | 0.57% |
| 2016 | 29,153 | 55 | 0.19% |
| 2015 | 29,098 | -30 | -0.10% |
| 2014 | 29,128 | -71 | -0.24% |
| 2013 | 29,199 | -112 | -0.38% |
| 2012 | 29,311 | -96 | -0.33% |
| 2011 | 29,407 | 610 | 2.12% |
| 2010 | 28,797 | 6,887 | 2.77% |
| 2000 | 21,910 | 5,837 | 3.15% |
| 1990 | 16,073 | 3,900 | 2.82% |
| 1980 | 12,173 | 4,905 | 5.29% |
| 1970 | 7,268 | 3,250 | 6.11% |
| 1960 | 4,018 | 996 | 2.89% |
| 1950 | 3,022 | 0.00% |