City in St. Louis County, Missouri · 2.9 sq mi · 1,329 people per sq mi
About 3,800 people live in Frontenac. The typical household earns $233,425, and the median resident is 46.3 years old.
2026 projection
From 3,624 in 2020
Poverty rate 1.99%
Men 45.2 · Women 48.2
1950–2026
3,828
2026 projection
5.6% 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.
1950–2026
3,828
2026 projection
5.6% 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 | 3,828 | +38 | 1.00% |
|---|---|---|---|
| 2025 | 3,790 | +13 | 0.34% |
| 2024 | 3,777 | +43 | 1.15% |
| 2023 | 3,734 | +27 | 0.73% |
| 2022 | 3,707 | +16 | 0.43% |
| 2021 | 3,691 | +67 | 1.85% |
| 2020 | 3,624 | +79 | 2.23% |
| 2019 | 3,545 | +11 | 0.31% |
| 2018 | 3,534 | +15 | 0.43% |
| 2017 | 3,519 | +11 | 0.31% |
Showing 10 of 23 years.
U.S. Census Bureau, 2024 ACS 5-year estimates · Table S0101
Each square is about 1% of residents (roughly 37 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 50 residents
62% of residents age 15 and older are married.
| Status | Overall | Male | Female |
|---|---|---|---|
| Married | 62% | 60% | 64% |
| Never married | 31% | 38% | 24% |
| Divorced | 4% | 2% | 6% |
| Widowed | 3% | <1% | 6% |
| Separated | 0% | 0% | 0% |
U.S. Census Bureau, 2024 ACS 5-year estimates · Table S1201
10 sources, all from the U.S. Census Bureau