City in Franklin County, Missouri · 4.8 sq mi · 997 people per sq mi
4,791 people live in St. Clair. The typical household earns $41,820, and the median resident is 37.6 years old.
2026 projection
From 4,791 in 2020
Poverty rate 15.05%
Men 34.9 · Women 40
1880–2026
4,791
2026 projection
0% since 2020 (no change)
Source: U.S. Census Bureau decennial counts and annual estimates, including 2010–2020 intercensal estimates. 2026 is a projection. Values between recorded years are interpolated.
Use the left and right arrow keys to inspect population observations.
1880–2026
4,791
2026 projection
0% since 2020 (no change)
Source: U.S. Census Bureau decennial counts and annual estimates, including 2010–2020 intercensal estimates. 2026 is a projection. Values between recorded years are interpolated.
Use the left and right arrow keys to inspect population observations.
| 2026 | 4,791 | -22 | 0.46% |
|---|---|---|---|
| 2025 | 4,813 | +85 | 1.80% |
| 2024 | 4,728 | -3 | 0.06% |
| 2023 | 4,731 | -35 | 0.73% |
| 2022 | 4,766 | -26 | 0.54% |
| 2021 | 4,792 | +1 | 0.02% |
| 2020 | 4,791 | +3 | 0.06% |
| 2019 | 4,788 | -19 | 0.40% |
| 2018 | 4,807 | -1 | 0.02% |
| 2017 | 4,808 | +25 | 0.52% |
Showing 10 of 30 years.
The 2020 row compares the April 1 Census count with the July 1, 2019 estimate (about nine months). Its Growth and Annual change therefore do not represent a full year.
St. Clair has a population change lower than Franklin County, Missouri, and the U.S.
Change from July 1, 2020 to July 1, 2025 population estimates—not annualized growth or site projections.
Source: U.S. Census Bureau. U.S. totals are summed from the 50 states and D.C.; unavailable comparisons are omitted.
U.S. Census Bureau, 2024 ACS 5-year estimates · Table S0101
Each square is about 1% of residents (roughly 48 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
47% of residents age 15 and older are married.
| Status | Overall | Male | Female |
|---|---|---|---|
| Married | 47% | 43% | 50% |
| Never married | 34% | 44% | 25% |
| Divorced | 9% | 8% | 9% |
| Widowed | 9% | 3% | 15% |
| Separated | 2% | 2% | 1% |
U.S. Census Bureau, 2024 ACS 5-year estimates · Table S1201
14 sources