Frontenac is a city in St. Louis County, Missouri, home to about 3,701 people across 2.9 square miles. It has no ZIP code of its own: it’s part of 63131.
Homes sold for a median of $283 per square foot in the three months ending August 2026, a seller’s market.
Mostly Des Peres; part is in Frontenac
Each card is that ZIP code’s whole market, including any part outside Frontenac. Seller’s market: under 4 months of supply; buyer’s market: over 6. Methodology
We’re writing up Frontenac’s story and what everyday life there is like, for people thinking about moving in.
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| Nearest major airport | St. Louis Lambert International Airport (STL)10 miles away |
|---|---|
| Nearest city of 250,000+ | St. Louis, MO11 miles away |
| Nearest city of 1 million+ | Chicago, IL266 miles away |
Straight-line distances from the center of Frontenac; driving is longer.
Source: Airports from OurAirports (scheduled passenger service); city centers and populations from the U.S. Census Bureau.
Source: Members of Congress from the congress-legislators project; districts from the Census Bureau’s relationship files; governor and mayor from Wikidata.
Frontenac had 3,612 residents in the 2020 census, up 4% since 2000.
It’s the 182nd largest of 1,060 towns in Missouri by population.
St. Louis County grew from 50,040 residents in 1900 to 1,004,125 in 2020.
St. Louis County, 1900–2020
Source: U.S. Census Bureau decennial censuses (counties 1900–1990 from the Bureau’s historical county file).
Average highs peak around 89°F in summer, and winter lows average 22°F. About 42.4 inches of rain and melted snow fall in a typical year, with about 8 inches of snow.
Source: NOAA 1991–2020 climate normals, St Charles 7 Ssw, MO weather station (6 miles away).
629,036 jobs at 29,717 businesses in St. Louis County. The biggest industries by employees:
Source: U.S. Census Bureau County Business Patterns 2023 (private employers; jobs counted where people work).
1,213 doctors and other health care providers list an office in Frontenac.
Nearest hospitals
Providers with an office here
| Primary care doctors | 86 |
|---|---|
| Specialist doctors | 362 |
| Dentists | 42 |
| Nurse practitioners and physician assistants | 232 |
| Mental health providers | 207 |
| Physical and occupational therapists | 229 |
| Optometrists | 19 |
| Chiropractors | 36 |
| Pharmacies | 10 |
Source: Hospitals from CMS Hospital General Information (ratings are CMS overall star ratings); straight-line distances; providers from the CMS National Plan and Provider Enumeration System (NPPES), by practice address and primary specialty.
Parks (3 nearby)
Grocery stores (2 nearby)
Pharmacies
Libraries
Museums
Theaters and performance venues
Counts are within about 1.5 miles of the center of town.
Source: Map data © OpenStreetMap contributors (openstreetmap.org/copyright), as mapped by volunteers; it can miss places or include closed ones.
Public schools here are run by Specl. Sch. Dst. St. Louis Co.. Check each district’s attendance zones for a specific address.
| School | Grades | Students | Type | Distance |
|---|---|---|---|---|
| External SitesTown and Country | Pre-K–12 | 1,223 | Public | 1.1 mi |
| Hiram NeuwoehnerTown and Country | 9–12 | 101 | Public | 1.1 mi |
| School | Grades | Students | Affiliation | Distance |
|---|---|---|---|---|
| Covenant Christian SchoolTown and Country | Pre-K–6 | 140 | Presbyterian | 0.4 mi |
| Our Lady of the Pillar SchoolSaint Louis | Pre-K–8 | 113 | Roman Catholic | 3.3 mi |
| Principia SchoolSaint Louis | Pre-K–12 | 423 | Other religious | 1.6 mi |
| Raintree SchoolSaint Louis | Pre-K–2 | 10 | Nonsectarian | 1.9 mi |
| St Clement Grade SchoolDes Peres | Pre-K–8 | 275 | Roman Catholic | 1.1 mi |
| Villa Duchesne SchoolSaint Louis | Pre-K–12 | 459 | Roman Catholic | 2.6 mi |
| Villa Duchesne Upper and Lower SchoolSaint Louis | Pre-K–12 | 465 | Roman Catholic | 2.6 mi |
| Visitation AcademySaint Louis | Pre-K–12 | 555 | Roman Catholic | 1.5 mi |
| St Paul's Lutheran SchoolDes Peres | K–8 | 212 | Lutheran Church–Missouri Synod | 0.9 mi |
| Chaminade College Preparatory SchoolSaint Louis | 6–12 | 872 | Roman Catholic | 3.3 mi |
| St Joseph's AcademySaint Louis | 9–12 | 587 | Roman Catholic | 2.3 mi |
Source: U.S. Department of Education, NCES: Common Core of Data (2024-2025) for public schools; Private School Universe Survey (2023-2024) for private schools. Listed by address; we don’t rate schools.
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Shares ZIP codes with Des Peres, Town and Country, Crystal Lake Park, Huntleigh, Westwood and Country Life Acres.
Town boundaries don’t always match ZIP codes: a ZIP code can cross into neighboring towns, and a town can share a ZIP code with its neighbors. Facts describe the town itself; market figures describe whole ZIP codes.