Checked
Frontenac, MO
City in St. Louis County, Missouri. ZIP codes: 63131.
Population
3,701
Land area
2.9sq mi
People per sq mi
1,284
ZIP codes
1
Frontenac and its ZIP codes
Frontenac at a glance
- Frontenac is about 14 times as dense as Missouri as a whole.
- It is the 182nd most populous of 1,062 cities and towns in Missouri.
- Households here earn a median of $233,425 a year, about 3.3 times the Missouri figure of $70,702.
- A typical owner-occupied home is valued at $979,800 (about 4.3 times the Missouri figure).
Local data for Frontenac, MO
Counts from official public data
Housing and community stats
Frontenac, MO, American Community Survey 2020-2024
Median household income
$233,425
Poverty rate
2.0%
Median home value
$979,800
Homeownership
97.4%
Bachelor's or higher
79.9%
Median age
46.3
Average commute
24.8 min
Largest reported origins and ancestries: German Americans (710), Irish Americans (650), Russian Americans (212).
Economy and federal money
Jobs, pay, income and spending are for St. Louis County. PPP loans are for Frontenac.
Unemployment rate
4.2%
Aug 2026, -0.3 pts in a year
Average annual pay
$78,741
589,803 jobs, 2025
Income per person
$104,775
BEA, 2024
Federal spending
$15.6B
FY 2026, $15,488 per person
How people get to work
Frontenac, MO, workers 16 and older. American Community Survey 5-year estimates
- Drove alone72.2%
- Carpooled2.7%
- Public transit0.0%
- Walked0.0%
- Bicycle0.0%
- Taxi, ride-hailing, motorcycle or other4.4%
- Worked from home20.7%
Average one-way commute: 24.8 minutes for people who do not work from home.
Environment and hazard risk
Frontenac, MO, from FEMA, NOAA and EPA
Natural hazard risk
Relatively High
Top: heat wave
Storm events since 1996
1,321
Countywide, mostly hail
Flood insurance policies
2,070
0.6% of homes, county
July high / Jan low
89° / 22°F
42.3 inches of rain a year
Hazards, floods and storm historyCheck a flood zone1 historic places
Health statistics
Share of adults in Frontenac, MO, CDC PLACES estimates
Obesity
25.6%
U.S. 33.3% -7.7 pts
Diabetes
9.9%
U.S. 12.1% -2.2 pts
Smoking
7.9%
U.S. 12.8% -4.9 pts
Uninsured (18-64)
3.5%
U.S. 11.1% -7.6 pts
ZIP codes in Frontenac
1 in or overlapping Frontenac. Population shown
Cities near Frontenac
| Name | Distance | Land area (sq mi) |
|---|---|---|
| Crystal Lake ParkCity | 0.9 mi | 0.1 |
| HuntleighCity | 1.2 mi | 1 |
| WestwoodVillage | 1.3 mi | 0.6 |
| LadueCity | 2 mi | 8.6 |
| Country Life AcresVillage | 2 mi | 0.1 |
| Warson WoodsCity | 2.2 mi | 0.6 |
| Creve CoeurCity | 2.6 mi | 10.3 |
| Rock HillCity | 3.1 mi | 1.1 |
| Des PeresCity | 3.1 mi | 4.3 |
| GlendaleCity | 3.1 mi | 1.3 |
| Town and CountryCity | 3.1 mi | 11.5 |
| KirkwoodCity | 3.6 mi | 9.2 |
| OlivetteCity | 3.8 mi | 2.8 |
| BrentwoodCity | 4.1 mi | 2 |
| OaklandCity | 4.2 mi | 0.6 |
| Webster GrovesCity | 4.5 mi | 5.9 |
Frequently asked questions
- What county is Frontenac, MO in?
- Frontenac is in St. Louis County, Missouri.
- What ZIP codes are in Frontenac, MO?
- ZIP codes in or overlapping Frontenac include 63131.
- What is the population of Frontenac, MO?
- About 3,701 people live in Frontenac, based on American Community Survey 5-year estimates.
- What cities are near Frontenac?
- Nearby places include Crystal Lake Park (0.9 mi), Huntleigh (1.2 mi), Westwood (1.3 mi), Ladue (2 mi), Country Life Acres (2 mi).
Source: U.S. Census Bureau (TIGER/Line boundaries, American Community Survey) · Data as of 12/31/2023