County in Missouri · 675 sq mi · 15 people per sq mi
10,109 people live in St. Clair County. The typical household earns $53,043, and the median resident is 46.1 years old.
2026 projection
From 9,350 in 2020
Poverty rate 14.68%
Men 46.3 · Women 46
1850–2026
10,109
2026 projection
8.1% since 2020 (increase)
Source: U.S. Census Bureau decennial counts and annual estimates. 2026 is a projection. Values between recorded years are interpolated.
Use the left and right arrow keys to inspect population observations.
1850–2026
10,109
2026 projection
8.1% since 2020 (increase)
Source: U.S. Census Bureau decennial counts and annual estimates. 2026 is a projection. Values between recorded years are interpolated.
Use the left and right arrow keys to inspect population observations.
| 2026 | 10,109 | +133 | 1.33% |
|---|---|---|---|
| 2025 | 9,976 | +133 | 1.35% |
| 2024 | 9,843 | +93 | 0.95% |
| 2023 | 9,750 | +166 | 1.73% |
| 2022 | 9,584 | +167 | 1.77% |
| 2021 | 9,417 | +67 | 0.72% |
| 2020 | 9,350 | -100 | 1.06% |
| 2019 | 9,450 | +19 | 0.20% |
| 2018 | 9,431 | +36 | 0.38% |
| 2017 | 9,395 | +85 | 0.91% |
Showing 10 of 32 years.
U.S. Census Bureau, 2024 ACS 5-year estimates · Table S0101
Each square is about 1% of residents (roughly 96 people).
Hispanic or Latino residents can be of any race. All other groups exclude Hispanic residents.
U.S. Census Bureau, 2024 ACS 5-year estimates · Table B03002
Half of households earn more, half earn less
Typical yearly pay for a worker 25 or older.
About 1 in 7 residents
53% of residents age 15 and older are married.
| Status | Overall | Male | Female |
|---|---|---|---|
| Married | 53% | 54% | 52% |
| Never married | 20% | 21% | 19% |
| Divorced | 17% | 18% | 16% |
| Widowed | 9% | 6% | 12% |
| Separated | 1% | 2% | 1% |
U.S. Census Bureau, 2024 ACS 5-year estimates · Table S1201
8 sources, all from the U.S. Census Bureau