St. Clair County's 2026 population is estimated at 99,807, reflecting a 1.46% growth rate over the past year (World Population Review estimate based on U.S. Census Bureau data). St. Clair County is the 15th largest county in Alabama. The 2010 population was 83,587 and has grown 19.4% since 2010.
Data after 2023 is projected based on recent change
Overall: 41.2 years
Female: 42.5 years
Male: 38.9 years
There are 73,226 adults, (16,832 of whom are seniors) in St. Clair County.
Female: 47,563 (50.5%)
Male: 46,603 (49.5%)
The racial composition of St. Clair County includes 83.66% White, 10.17% Black or African American, and smaller percentages for other race, Asian, Native American, Native Hawaiian or Pacific Islander and multiracial populations.
| Race | Population ↓ | Percentage (of total) |
|---|---|---|
| White | 78,776 | 83.66% |
| Black or African American | 9,575 | 10.17% |
| Two or more races | 3,390 | 3.6% |
| Other race | 1,466 | 1.56% |
| Asian | 537 | 0.57% |
| Native American | 337 | 0.36% |
| Native Hawaiian or Pacific Islander | 85 | 0.09% |
St. Clair County 's average per capita income is $50,509. Household income levels show a median of $77,463. The poverty rate stands at 11.35%.
| Name | Median ↓ | Mean |
|---|---|---|
| Married Families | $102,648 | - |
| Families | $90,154 | $102,083 |
| Households | $77,463 | $91,073 |
| Non Families | $41,664 | $57,056 |
Average Income
Median Household Income
Poverty Rate
