Population by Age in St. Clair County
*Base on 2010 Data
| Total population | 270,056 | 100.00% |
| Under 5 years | 18,398 | 6.81% |
| 5 to 9 years | 18,671 | 6.91% |
| 10 to 14 years | 19,182 | 7.10% |
| 15 to 19 years | 19,754 | 7.31% |
| 20 to 24 years | 17,426 | 6.45% |
| 25 to 29 years | 18,105 | 6.70% |
| 30 to 34 years | 17,073 | 6.32% |
| 35 to 39 years | 17,358 | 6.43% |
| 40 to 44 years | 17,859 | 6.61% |
| 45 to 49 years | 20,764 | 7.69% |
| 50 to 54 years | 20,542 | 7.61% |
| 55 to 59 years | 17,521 | 6.49% |
| 60 to 64 years | 13,593 | 5.03% |
| 65 to 69 years | 9,779 | 3.62% |
| 70 to 74 years | 7,473 | 2.77% |
| 75 to 79 years | 6,486 | 2.40% |
| 80 to 84 years | 5,366 | 1.99% |
| 85 years and over | 4,706 | 1.74% |
Male Population in St. Clair County
*Base on 2010 Data
| Male population | 129,976 | 48.13% |
| Under 5 years | 9,432 | 3.49% |
| 5 to 9 years | 9,577 | 3.55% |
| 10 to 14 years | 9,636 | 3.57% |
| 15 to 19 years | 10,111 | 3.74% |
| 20 to 24 years | 8,601 | 3.18% |
| 25 to 29 years | 8,871 | 3.28% |
| 30 to 34 years | 8,126 | 3.01% |
| 35 to 39 years | 8,299 | 3.07% |
| 40 to 44 years | 8,552 | 3.17% |
| 45 to 49 years | 10,144 | 3.76% |
| 50 to 54 years | 9,883 | 3.66% |
| 55 to 59 years | 8,369 | 3.10% |
| 60 to 64 years | 6,508 | 2.41% |
| 65 to 69 years | 4,537 | 1.68% |
| 70 to 74 years | 3,214 | 1.19% |
| 75 to 79 years | 2,683 | 0.99% |
| 80 to 84 years | 2,061 | 0.76% |
| 85 years and over | 1,372 | 0.51% |
Female Population in St. Clair County
*Base on 2010 Data
| Female population | 140,080 | 51.87% |
| Under 5 years | 8,966 | 3.32% |
| 5 to 9 years | 9,094 | 3.37% |
| 10 to 14 years | 9,546 | 3.53% |
| 15 to 19 years | 9,643 | 3.57% |
| 20 to 24 years | 8,825 | 3.27% |
| 25 to 29 years | 9,234 | 3.42% |
| 30 to 34 years | 8,947 | 3.31% |
| 35 to 39 years | 9,059 | 3.35% |
| 40 to 44 years | 9,307 | 3.45% |
| 45 to 49 years | 10,620 | 3.93% |
| 50 to 54 years | 10,659 | 3.95% |
| 55 to 59 years | 9,152 | 3.39% |
| 60 to 64 years | 7,085 | 2.62% |
| 65 to 69 years | 5,242 | 1.94% |
| 70 to 74 years | 4,259 | 1.58% |
| 75 to 79 years | 3,803 | 1.41% |
| 80 to 84 years | 3,305 | 1.22% |
| 85 years and over | 3,334 | 1.23% |
Median Age in St. Clair County
*Base on 2010 Data
| Both | 36.90% | |
| Male | 35.40% | |
| Female | 38.30% |
Race in St. Clair County
*Base on 2010 Data
| Total | 270,056 | 100.00% |
| Population of one race | 264,048 | 97.78% |
| White | 174,458 | 64.60% |
| Black or African American | 82,302 | 30.48% |
| American Indian and Alaska Native | 652 | 0.24% |
| Asian | 3,276 | 1.21% |
| Asian Indian | 527 | 0.20% |
| Chinese | 424 | 0.16% |
| Filipino | 854 | 0.32% |
| Japanese | 198 | 0.07% |
| Korean | 546 | 0.20% |
| Vietnamese | 220 | 0.08% |
| Other Asian | 507 | 0.19% |
| Native Hawaiian and Other Pacific Islander | 227 | 0.08% |
| Native Hawaiian | 60 | 0.02% |
| Guamanian or Chamorro | 87 | 0.03% |
| Samoan | 31 | 0.01% |
| Other Pacific Islander | 49 | 0.02% |
| Some Other Race | 3,133 | 1.16% |
| Population of Two or More Races | 6,008 | 2.22% |
| White; American Indian and Alaska Native | 794 | 0.29% |
| White; Asian | 1,185 | 0.44% |
| White; Black or African American | 2,242 | 0.83% |
| White; Some Other Race | 375 | 0.14% |
The Population 16 Years in St. Clair County
*Base on 2010 Data
| Total | 209,781 | 100.00% |
| Male | 99,274 | 47.32% |
| Female | 110,507 | 52.68% |
The Population 18 Years in St. Clair County
*Base on 2010 Data
| Total | 201,468 | 100.00% |
| Male | 95,045 | 47.18% |
| Female | 106,423 | 52.82% |
The Population 21 Years in St. Clair County
*Base on 2010 Data
| Total | 190,548 | 100.00% |
| Male | 89,404 | 46.92% |
| Female | 101,144 | 53.08% |
The Population 62 Years in St. Clair County
*Base on 2010 Data
| Total | 41,603 | 100.00% |
| Male | 17,617 | 42.35% |
| Female | 23,986 | 57.65% |
The Population 65 Years in St. Clair County
*Base on 2010 Data
| Total | 33,810 | 100.00% |
| Male | 13,867 | 41.01% |
| Female | 19,943 | 58.99% |
Race (total races tallied) in St. Clair County
*Base on 2010 Data
| White alone or in combination with one or more other races | 179,605 | 64.93% |
| Black or African American alone or in combination with one or more other races | 85,623 | 30.96% |
| American Indian and Alaska Native alone or in combination with one or more other races | 2,037 | 0.74% |
| Asian alone or in combination with one or more other races | 5,005 | 1.81% |
| Native Hawaiian and Other Pacific Islander alone or in combination with one or more other races | 517 | 0.19% |
| Some Other Race alone or in combination with one or more other races | 3,814 | 1.38% |
Hispanic or Latino by Specific Origin in St. Clair County
*Base on 2010 Data
| Total | 270,056 | 100.00% |
| Hispanic or Latino (of any race) | 8,785 | 3.25% |
| Mexican | 6,048 | 2.24% |
| Puerto Rican | 896 | 0.33% |
| Cuban | 156 | 0.06% |
| Other Hispanic or Latino | 1,685 | 0.62% |
| Not Hispanic or Latino | 261,271 | 96.75% |
Hispanic or Latino and Race in St. Clair County
*Base on 2010 Data
| Total | 270,056 | 100.00% |
| Hispanic or Latino | 8,785 | 3.25% |
| White alone | 4,600 | 1.70% |
| Black or African American alone | 442 | 0.16% |
| American Indian and Alaska Native alone | 113 | 0.04% |
| Asian alone | 63 | 0.02% |
| Native Hawaiian and Other Pacific Islander alone | 14 | 0.01% |
| Some Other Race alone | 2,772 | 1.03% |
| Two or More Races | 781 | 0.29% |
| Not Hispanic or Latino | 261,271 | 96.75% |
| White alone | 169,858 | 62.90% |
| Black or African American alone | 81,860 | 30.31% |
| American Indian and Alaska Native alone | 539 | 0.20% |
| Asian alone | 3,213 | 1.19% |
| Native Hawaiian and Other Pacific Islander alone | 213 | 0.08% |
| Some Other Race alone | 361 | 0.13% |
| Two or More Races | 5,227 | 1.94% |
Relationship in St. Clair County
*Base on 2010 Data
| Total | 270,056 | 100.00% |
| In households | 265,605 | 98.35% |
| Householder | 105,045 | 38.90% |
| Spouse | 46,846 | 17.35% |
| Child | 83,983 | 31.10% |
| Own child under 18 years | 59,863 | 22.17% |
| Other relatives | 16,771 | 6.21% |
| Under 18 years | 7,455 | 2.76% |
| 65 years and over | 1,782 | 0.66% |
| Nonrelatives | 12,960 | 4.80% |
| Under 18 years | 1,085 | 0.40% |
| 65 years and over | 488 | 0.18% |
| Unmarried partner | 6,934 | 2.57% |
| In group quarters | 4,451 | 1.65% |
| Institutionalized population | 3,172 | 1.17% |
| Male | 1,818 | 0.67% |
| Female | 1,354 | 0.50% |
| Noninstitutionalized population | 1,279 | 0.47% |
| Male | 747 | 0.28% |
| Female | 532 | 0.20% |
Households by Type in St. Clair County
*Base on 2010 Data
| Subject | Number | Percent |
|---|---|---|
| Total | 105,045 | 100.00% |
| Family households (families) | 70,689 | 67.29% |
| With own children under 18 years | 32,169 | 30.62% |
| Husband-wife family | 46,846 | 44.60% |
| With own children under 18 years | 19,113 | 18.20% |
| Male householder, no wife present | 5,254 | 5.00% |
| With own children under 18 years | 2,516 | 2.40% |
| Female householder, no husband present | 18,589 | 17.70% |
| With own children under 18 years | 10,540 | 10.03% |
| Nonfamily households | 34,356 | 32.71% |
| Householder living alone | 28,916 | 27.53% |
| Male | 12,938 | 12.32% |
| 65 years and over | 2,899 | 2.76% |
| Female | 15,978 | 15.21% |
| 65 years and over | 7,317 | 6.97% |
Households with individuals under 18 years in St. Clair County
*Base on 2010 Data
| Total | 36,427 | 34.68% |
Households with individuals under 65 years in St. Clair County
*Base on 2010 Data
| Total | 24,711 | 23.52% |
Average Household Size in St. Clair County
*Base on 2010 Data
| Average household size | 3 | % |
Average Family Size in St. Clair County
*Base on 2010 Data
| Average family size | 3 | % |
Housing Occupancy(Total housing units) in St. Clair County
*Base on 2010 Data
| Total | 116,249 | 100.00% |
| Occupied housing units | 105,045 | 90.36% |
| Vacant housing units | 11,204 | 9.64% |
| For rent | 3,750 | 3.23% |
| Rented, not occupied | 177 | 0.15% |
| For sale only | 1,938 | 1.67% |
| Sold, not occupied | 543 | 0.47% |
| For seasonal, recreational, or occasional use | 301 | 0.26% |
| All other vacants | 4,495 | 3.87% |
Homeowner Vacancy Rate in St. Clair County
*Base on 2010 Data
| Homeowner vacancy rate (percent) | 2.70% |
Rental Vacancy Rate in St. Clair County
*Base on 2010 Data
| Rental vacancy rate (percent) | 9.50% |
Housing Tenure(Occupied housing units) in St. Clair County
*Base on 2010 Data
| Total | 105,045 | 100.00% |
| Owner-occupied housing units | 69,646 | 66.30% |
| Renter-occupied housing units | 35,399 | 33.70% |
Population in Occupied Housing Units by Tenure(Population in occupied housing units) in St. Clair County
*Base on 2010 Data
| Owner-occupied housing units | 180,025 | 67.78% |
| Renter-occupied housing units | 85,580 | 32.22% |
Average Household Size of Occupied Housing Units by Tenure in St. Clair County
*Base on 2010 Data
| Owner occupied | 3 | % |
| Renter occupied | 2 | % |