State
County
Land Area (mi²)
15.4 sq mi
Density (mi²)
1,928.80/sq mi
2020 Growth Rate
0.09%
Growth Since 2010
4.79%
Rank in State
Rank in Country
According to the most recent ACS, the racial composition of O'Fallon was:
| 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% |
| 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 |
| Mujer | 1,148 | 3.27 | 46.3 |
| Masculino | 460 | 3.25 | 68.7 |
3.18
Average Family Size
2.67
Average Household Size
| 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% |
| 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%.
$54,180
Average Earnings
$69,410
Average Male
$39,322
Average Female
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.
| 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
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%.
58.8%
Overall Marriage Rate
60.3%
Male Marriage Rate
57.4%
Female Marriage Rate
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.
| 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% |
1.44%
Veteran Poverty Rate
16.29%
Veteran Disability Rate
69.2%
Labor Force Participation
62.3%
Employment Rate
4.5%
Unemployment Rate
Non citizens include legal permanent residents (green card holders), international students, temporary workers, humanitarian migrants, and illegal immigrants.
95.50%
Native Born
4.50%
Foreign Born
1.79%
Non Citizen
2.71%
Naturalized
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.
| 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% |