City in St. Louis County, Missouri · 3.2 sq mi · 3,974 people per sq mi
12,539 people live in St. Ann. The typical household earns $52,323, and the median resident is 34.8 years old.
2026 projection
From 13,019 in 2020
Poverty rate 13.02%
Men 32.6 · Women 36.8
1950–2026
12,539
2026 projection
3.7% since 2020 (decrease)
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.
1950–2026
12,539
2026 projection
3.7% since 2020 (decrease)
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 | 12,539 | -78 | 0.62% |
|---|---|---|---|
| 2025 | 12,617 | -45 | 0.36% |
| 2024 | 12,662 | -8 | 0.06% |
| 2023 | 12,670 | -77 | 0.60% |
| 2022 | 12,747 | -129 | 1.00% |
| 2021 | 12,876 | -143 | 1.10% |
| 2020 | 13,019 | -6 | 0.05% |
| 2019 | 13,025 | -4 | 0.03% |
| 2018 | 13,029 | -21 | 0.16% |
| 2017 | 13,050 | -26 | 0.20% |
Showing 10 of 23 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. Ann has a population change lower than St. Louis 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 128 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 8 residents
33% of residents age 15 and older are married.
| Status | Overall | Male | Female |
|---|---|---|---|
| Married | 33% | 35% | 32% |
| Never married | 42% | 47% | 37% |
| Divorced | 15% | 14% | 15% |
| Widowed | 8% | 3% | 12% |
| Separated | 3% | <1% | 4% |
U.S. Census Bureau, 2024 ACS 5-year estimates · Table S1201
14 sources