Frontenac, Missouri.
Typical home $1,292,168 (+7.0% in a year). St. Louis, MO-IL metro.
to buy the typical home at today's mortgage rate — +$3,813 (+128%) since Jan 2020.
- 1 year
- Up $84,644 +7%
- $1,207,524$1,292,168 since Sep 2025
- 5 years
- Up $343,520 +36%
- $948,648$1,292,168 since Sep 2021
Monthly payment to buy the typical home
Home value × that month's 30-year mortgage rate, 20% down, principal and interest. This is the line households feel: prices and rates compound each other.
- Frontenac$6,782
- Missouri$1,393
- United States$1,922
At the last five years' pace, a typical home here doubles in price every 11 years.
Typical home values in Frontenac, MO rose 7.0% over the past year — faster than the nation's +1.2%.
Living in Frontenac, St. Louis County, Missouri
Frontenac is a city of 3,612 people in St. Louis County. Half its households earn more than $233,425 a year and half less, against $82,936 across St. Louis County; 2% of its people live below the poverty line. 97% of its homes are lived in by their owners and 3% are rented. Unemployment in St. Louis County was 4.2% in August 2026, and the county had 1.2% fewer jobs in 2025 than the year before. The most residents work in schools and health care, then professional services.
Written by AI Claude Sonnet 5.5 wrote this on 23 October 2026 from the figures here, a list of nearby places and what it knows. It can be wrong or out of date.
What it’s like
The place. Frontenac is a small city in St. Louis County, home to a settled, older community where nearly everyone owns the home they live in. Household incomes run far above the county's, very few residents live below the poverty line, and most adults hold a four-year degree. Winters are cold, with highs near freezing in January and a little snow, while summers turn properly warm.
Work. Residents work mostly in schools, hospitals and social care, in professional and business services, and in banks, insurance and property. Across St. Louis County, some of the largest workplaces are Washington University in St Louis, The Boeing Company and Mercy Hospital - St. Louis. A good number of people work from home, and the typical commute is a moderate one.
Things to do. A short drive away are the Missouri Botanical Garden, the Saint Louis Zoo and the Saint Louis Art Museum, all close enough for an easy afternoon. Forest Park, also a short drive off, is a large public garden and park. Farther afield, a longer drive reaches Gateway Arch National Park downtown.
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- 1,197households
- 80%of adults have a degree
- 2%below the poverty line
- 25 mintypical commute
- 21%work from home
What residents work in
Employed residents by industry, from the Census survey. St. Louis County had 589,803 jobs in 2025, 1.2% fewer than the year before (Bureau of Labor Statistics).
Weather through the year
Coldest in January, with highs near 40° and lows near 22°; warmest in July, with highs near 89° and lows near 69°. About 8 inches of snow and 42 inches of rain and melted snow a year.
Average daily high and low, 1991–2020, at the St. Charles Ssw weather station, 7 miles away (NOAA).
Largest workplaces in St. Louis County
- Washington University in St LouisUniversity or college20,568
- The Boeing CompanyAircraft manufacturing13,947
- Graybar Electric CompanyDistribution equipment, electrical, merchant wholesalers7,787
- Specl. Sch. Dst. St. Louis CO SchoolsSchool district5,153FTE
- Mercy Hospital - St. LouisGeneral hospital5,074FTE
- Brinkmann ConstructorsCommercial building construction general contractors4,695
- Rockwood R-VI SchoolsSchool district3,388FTE
- SSM Health St. Marys Hospital - STLGeneral hospital3,059FTE
Staff on average in 2025, as each workplace reported it to OSHA with its injury records: 995 workplaces with 20 or more staff, 186,284 people in all across the county; Frontenac has none of its own. Colleges come from IPEDS (NCES, 2023–24), school districts from the Common Core of Data (NCES, 2023–24) and hospitals from their Medicare cost reports (CMS, 2023); FTE marks full-time equivalent staff. Not listed: many offices and banks, which need not report to OSHA; military bases, whose staff OPM withholds; and, in about half the states, city and county governments.
Natural hazards
- Heat wavesVery high
- HailRelatively high
- EarthquakesRelatively high
- Inland floodingRelatively high
- Ice stormsRelatively moderate
- Winter weatherrelatively high in parts of FrontenacRelatively moderate
FEMA’s National Risk Index (December 2025) rates the risk each natural hazard poses to the people, buildings and farms in Frontenac’s census tracts, against the rest of the country; all of them together, relatively high. It is meant for planning, not a substitute for a local risk assessment or a flood map: FEMA’s index.
From the U.S. Census Bureau’s 2020 census and its American Community Survey (2020–2024 five-year estimates), and the Bureau of Labor Statistics. A survey, so each figure has a margin of error, and figures it is not sure of are left out. More on St. Louis County and the St. Louis, MO-IL metro.
Frontenac home values
Zillow measures a city over its municipal boundary. Against the state and national figures, mid-tier homes, smoothed and seasonally adjusted.
- Frontenac$1,292,168
- Missouri$265,387
- United States$366,157
When this market ran hot
Each cell is that month's year-on-year home-value growth. Read left to right, top row is the latest year — the 2021–22 band is the boom.
Market heat, inside the city limits
Homes for sale
Active for-sale inventory. More supply hands power to buyers.
- Frontenac5
New listings per month
Sellers arriving at the market.
Not enough data to draw this yet.
Zip codes with a Frontenac address
A different geography, not a breakdown. The figure above covers the municipality; these zips cover everywhere the Post Office calls Frontenac — often including townships beyond the city limits. Both come straight from Zillow, and they are not expected to average out.
Zillow publishes no zip-level series with this city on the address.