St. Louis County's 2026 population is estimated at 997,037, reflecting a 0.21% growth rate over the past year (World Population Review estimate based on U.S. Census Bureau data). St. Louis County is the largest county in Missouri. The 2010 population was 998,846 and has grown -0.18% since 2010.
Data after 2023 is projected based on recent change
Overall: 40.3 years
Female: 41.9 years
Male: 38.6 years
There are 776,665 adults, (190,319 of whom are seniors) in St. Louis County.
Female: 519,306 (52.2%)
Male: 476,263 (47.8%)
The racial composition of St. Louis County includes 62.11% White, 24.11% Black or African American, 4.9% Asian, and smaller percentages for other race, Native American, Native Hawaiian or Pacific Islander and multiracial populations.
| Race | Population ↓ | Percentage (of total) |
|---|---|---|
| White | 618,307 | 62.11% |
| Black or African American | 240,070 | 24.11% |
| Two or more races | 69,258 | 6.96% |
| Asian | 48,760 | 4.9% |
| Other race | 17,813 | 1.79% |
| Native American | 1,148 | 0.12% |
| Native Hawaiian or Pacific Islander | 213 | 0.02% |
St. Louis County 's average per capita income is $56,448. Household income levels show a median of $82,936. The poverty rate stands at 9.79%.
| Name | Median ↓ | Mean |
|---|---|---|
| Married Families | $137,551 | $185,714 |
| Families | $110,950 | $154,483 |
| Households | $82,936 | $123,036 |
| Non Families | $49,697 | $68,934 |
Average Income
Median Household Income
Poverty Rate
