Population by Age in O'fallon City
*Base on 2010 Data
| Total population | 28,281 | 100.00% |
| Under 5 years | 1,789 | 6.33% |
| 5 to 9 years | 2,205 | 7.80% |
| 10 to 14 years | 2,310 | 8.17% |
| 15 to 19 years | 2,159 | 7.63% |
| 20 to 24 years | 1,593 | 5.63% |
| 25 to 29 years | 1,678 | 5.93% |
| 30 to 34 years | 1,845 | 6.52% |
| 35 to 39 years | 2,027 | 7.17% |
| 40 to 44 years | 2,337 | 8.26% |
| 45 to 49 years | 2,538 | 8.97% |
| 50 to 54 years | 2,134 | 7.55% |
| 55 to 59 years | 1,750 | 6.19% |
| 60 to 64 years | 1,362 | 4.82% |
| 65 to 69 years | 864 | 3.06% |
| 70 to 74 years | 627 | 2.22% |
| 75 to 79 years | 477 | 1.69% |
| 80 to 84 years | 335 | 1.18% |
| 85 years and over | 251 | 0.89% |
Male Population in O'fallon City
*Base on 2010 Data
| Male population | 13,725 | 48.53% |
| Under 5 years | 904 | 3.20% |
| 5 to 9 years | 1,196 | 4.23% |
| 10 to 14 years | 1,196 | 4.23% |
| 15 to 19 years | 1,117 | 3.95% |
| 20 to 24 years | 792 | 2.80% |
| 25 to 29 years | 805 | 2.85% |
| 30 to 34 years | 858 | 3.03% |
| 35 to 39 years | 923 | 3.26% |
| 40 to 44 years | 1,119 | 3.96% |
| 45 to 49 years | 1,232 | 4.36% |
| 50 to 54 years | 1,026 | 3.63% |
| 55 to 59 years | 810 | 2.86% |
| 60 to 64 years | 662 | 2.34% |
| 65 to 69 years | 409 | 1.45% |
| 70 to 74 years | 276 | 0.98% |
| 75 to 79 years | 208 | 0.74% |
| 80 to 84 years | 123 | 0.43% |
| 85 years and over | 69 | 0.24% |
Female Population in O'fallon City
*Base on 2010 Data
| Female population | 14,556 | 51.47% |
| Under 5 years | 885 | 3.13% |
| 5 to 9 years | 1,009 | 3.57% |
| 10 to 14 years | 1,114 | 3.94% |
| 15 to 19 years | 1,042 | 3.68% |
| 20 to 24 years | 801 | 2.83% |
| 25 to 29 years | 873 | 3.09% |
| 30 to 34 years | 987 | 3.49% |
| 35 to 39 years | 1,104 | 3.90% |
| 40 to 44 years | 1,218 | 4.31% |
| 45 to 49 years | 1,306 | 4.62% |
| 50 to 54 years | 1,108 | 3.92% |
| 55 to 59 years | 940 | 3.32% |
| 60 to 64 years | 700 | 2.48% |
| 65 to 69 years | 455 | 1.61% |
| 70 to 74 years | 351 | 1.24% |
| 75 to 79 years | 269 | 0.95% |
| 80 to 84 years | 212 | 0.75% |
| 85 years and over | 182 | 0.64% |
Median Age in O'fallon City
*Base on 2010 Data
| Both | 36.40% | |
| Male | 35.00% | |
| Female | 37.70% |
Race in O'fallon City
*Base on 2010 Data
| Total | 28,281 | 100.00% |
| Population of one race | 27,423 | 96.97% |
| White | 21,872 | 77.34% |
| Black or African American | 4,404 | 15.57% |
| American Indian and Alaska Native | 69 | 0.24% |
| Asian | 785 | 2.78% |
| Asian Indian | 128 | 0.45% |
| Chinese | 83 | 0.29% |
| Filipino | 224 | 0.79% |
| Japanese | 55 | 0.19% |
| Korean | 162 | 0.57% |
| Vietnamese | 33 | 0.12% |
| Other Asian | 100 | 0.35% |
| Native Hawaiian and Other Pacific Islander | 28 | 0.10% |
| Native Hawaiian | 4 | 0.01% |
| Guamanian or Chamorro | 14 | 0.05% |
| Samoan | 8 | 0.03% |
| Other Pacific Islander | 2 | 0.01% |
| Some Other Race | 265 | 0.94% |
| Population of Two or More Races | 858 | 3.03% |
| White; American Indian and Alaska Native | 97 | 0.34% |
| White; Asian | 255 | 0.90% |
| White; Black or African American | 282 | 1.00% |
| White; Some Other Race | 28 | 0.10% |
The Population 16 Years in O'fallon City
*Base on 2010 Data
| Total | 21,501 | 100.00% |
| Male | 10,196 | 47.42% |
| Female | 11,305 | 52.58% |
The Population 18 Years in O'fallon City
*Base on 2010 Data
| Total | 20,512 | 100.00% |
| Male | 9,676 | 47.17% |
| Female | 10,836 | 52.83% |
The Population 21 Years in O'fallon City
*Base on 2010 Data
| Total | 19,528 | 100.00% |
| Male | 9,161 | 46.91% |
| Female | 10,367 | 53.09% |
The Population 62 Years in O'fallon City
*Base on 2010 Data
| Total | 3,350 | 100.00% |
| Male | 1,497 | 44.69% |
| Female | 1,853 | 55.31% |
The Population 65 Years in O'fallon City
*Base on 2010 Data
| Total | 2,554 | 100.00% |
| Male | 1,085 | 42.48% |
| Female | 1,469 | 57.52% |
Race (total races tallied) in O'fallon City
*Base on 2010 Data
| White alone or in combination with one or more other races | 22,615 | 77.41% |
| Black or African American alone or in combination with one or more other races | 4,829 | 16.53% |
| American Indian and Alaska Native alone or in combination with one or more other races | 246 | 0.84% |
| Asian alone or in combination with one or more other races | 1,127 | 3.86% |
| Native Hawaiian and Other Pacific Islander alone or in combination with one or more other races | 64 | 0.22% |
| Some Other Race alone or in combination with one or more other races | 333 | 1.14% |
Hispanic or Latino by Specific Origin in O'fallon City
*Base on 2010 Data
| Total | 28,281 | 100.00% |
| Hispanic or Latino (of any race) | 982 | 3.47% |
| Mexican | 546 | 1.93% |
| Puerto Rican | 144 | 0.51% |
| Cuban | 31 | 0.11% |
| Other Hispanic or Latino | 261 | 0.92% |
| Not Hispanic or Latino | 27,299 | 96.53% |
Hispanic or Latino and Race in O'fallon City
*Base on 2010 Data
| Total | 28,281 | 100.00% |
| Hispanic or Latino | 982 | 3.47% |
| White alone | 593 | 2.10% |
| Black or African American alone | 32 | 0.11% |
| American Indian and Alaska Native alone | 9 | 0.03% |
| Asian alone | 13 | 0.05% |
| Native Hawaiian and Other Pacific Islander alone | 2 | 0.01% |
| Some Other Race alone | 238 | 0.84% |
| Two or More Races | 95 | 0.34% |
| Not Hispanic or Latino | 27,299 | 96.53% |
| White alone | 21,279 | 75.24% |
| Black or African American alone | 4,372 | 15.46% |
| American Indian and Alaska Native alone | 60 | 0.21% |
| Asian alone | 772 | 2.73% |
| Native Hawaiian and Other Pacific Islander alone | 26 | 0.09% |
| Some Other Race alone | 27 | 0.10% |
| Two or More Races | 763 | 2.70% |
Relationship in O'fallon City
*Base on 2010 Data
| Total | 28,281 | 100.00% |
| In households | 28,281 | 100.00% |
| Householder | 10,747 | 38.00% |
| Spouse | 6,035 | 21.34% |
| Child | 9,337 | 33.02% |
| Own child under 18 years | 7,212 | 25.50% |
| Other relatives | 1,129 | 3.99% |
| Under 18 years | 478 | 1.69% |
| 65 years and over | 147 | 0.52% |
| Nonrelatives | 1,033 | 3.65% |
| Under 18 years | 76 | 0.27% |
| 65 years and over | 23 | 0.08% |
| Unmarried partner | 561 | 1.98% |
| In group quarters | 0 | 0.00% |
| Institutionalized population | 0 | 0.00% |
| Male | 0 | 0.00% |
| Female | 0 | 0.00% |
| Noninstitutionalized population | 0 | 0.00% |
| Male | 0 | 0.00% |
| Female | 0 | 0.00% |
Households by Type in O'fallon City
*Base on 2010 Data
| Subject | Number | Percent |
|---|---|---|
| Total | 10,747 | 100.00% |
| Family households (families) | 7,804 | 72.62% |
| With own children under 18 years | 3,955 | 36.80% |
| Husband-wife family | 6,035 | 56.16% |
| With own children under 18 years | 2,912 | 27.10% |
| Male householder, no wife present | 430 | 4.00% |
| With own children under 18 years | 231 | 2.15% |
| Female householder, no husband present | 1,339 | 12.46% |
| With own children under 18 years | 812 | 7.56% |
| Nonfamily households | 2,943 | 27.38% |
| Householder living alone | 2,461 | 22.90% |
| Male | 1,024 | 9.53% |
| 65 years and over | 171 | 1.59% |
| Female | 1,437 | 13.37% |
| 65 years and over | 559 | 5.20% |
Households with individuals under 18 years in O'fallon City
*Base on 2010 Data
| Total | 4,260 | 39.64% |
Households with individuals under 65 years in O'fallon City
*Base on 2010 Data
| Total | 1,907 | 17.74% |
Average Household Size in O'fallon City
*Base on 2010 Data
| Average household size | 3 | % |
Average Family Size in O'fallon City
*Base on 2010 Data
| Average family size | 3 | % |
Housing Occupancy(Total housing units) in O'fallon City
*Base on 2010 Data
| Total | 11,414 | 100.00% |
| Occupied housing units | 10,747 | 94.16% |
| Vacant housing units | 667 | 5.84% |
| For rent | 277 | 2.43% |
| Rented, not occupied | 14 | 0.12% |
| For sale only | 187 | 1.64% |
| Sold, not occupied | 30 | 0.26% |
| For seasonal, recreational, or occasional use | 27 | 0.24% |
| All other vacants | 132 | 1.16% |
Homeowner Vacancy Rate in O'fallon City
*Base on 2010 Data
| Homeowner vacancy rate (percent) | 2.40% |
Rental Vacancy Rate in O'fallon City
*Base on 2010 Data
| Rental vacancy rate (percent) | 7.90% |
Housing Tenure(Occupied housing units) in O'fallon City
*Base on 2010 Data
| Total | 10,747 | 100.00% |
| Owner-occupied housing units | 7,519 | 69.96% |
| Renter-occupied housing units | 3,228 | 30.04% |
Population in Occupied Housing Units by Tenure(Population in occupied housing units) in O'fallon City
*Base on 2010 Data
| Owner-occupied housing units | 20,924 | 73.99% |
| Renter-occupied housing units | 7,357 | 26.01% |
Average Household Size of Occupied Housing Units by Tenure in O'fallon City
*Base on 2010 Data
| Owner occupied | 3 | % |
| Renter occupied | 2 | % |