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Frontenac, Missouri

City in St. Louis County, Missouri · ZIP 63131

  • St. Louis County
  • Census data · ACS 2019-2023
Join FrontenacAsk FrontenacBusinessesPeople
  • 3,777 (2024 estimate)Population
  • 1,153Households
  • $225,813Median household income
  • $1,004,500Median home value
  • 1ZIP codes

About Frontenac

This page shows only what has been published about Frontenac: Census facts with their sources first, then its businesses, jobs, events, people in public roles, housing and questions as they are added. Nothing here is written by the town government.

Town intelligenceOfficial sources, refreshed yearly

Population, 2000 to 2020+3.7%
3.5k3.5k3.6k3.6k3.7k2000: 3,48320002010: 3,48220102020: 3,61220203,4833,612
Population of Frontenac at each census
CensusPopulation
20003,483
20103,482
20203,612

As counted at each census, within the boundaries the area had then; the current estimate is in the glance card.

Sources: Census 2000 Summary File 1: total population, place level, state 29, retrieved November 14, 2026; Census 2010 Summary File 1: total population, place level, state 29, retrieved November 14, 2026; Census 2020 Redistricting Data (P.L. 94-171): total population, place level, state 29, retrieved November 14, 2026.

Household income in Frontenac
Under $50k13.7%
$50k to $100k10.3%
$100k to $150k12.1%
$150k to $200k9.5%
$200k and over54.6%

Median household income $225,813 · Share of households by income, American Community Survey 5-year 2019-2023, table S1901.

Source: American Community Survey 5-year subject table S1901 (household income) 2019–2023, place level, state 29, retrieved November 14, 2026.

Housing tenure in Frontenac
Owner occupied
1,127 units
Renter occupied
26 units
Vacancy rate
0%

Occupied housing units by tenure and the share of all units vacant, American Community Survey 5-year 2019-2023, table DP04.

Source: American Community Survey 5-year data profile 2019–2023, place level, state 29, retrieved November 14, 2026.

Frontenac compared with its county and state
Frontenac compared with its county and state, American Community Survey 2019-2023
MeasureFrontenacSt. Louis CountyMissouri
Population3,669996,6186,168,181
Median household income$225,813$81,340$68,920
Median age45.840.238.9
Median home value$1,004,500$260,700$215,600
Bachelor’s degree or higher86.9%46.9%31.9%
Foreign-born residents11.0%8.1%4.4%
Owner-occupied homes97.7%69.0%67.9%
Mean commute to work25.8 minutes23.3 minutes23.7 minutes

Source: American Community Survey 5-year data profile 2019–2023, place level, state 29, retrieved November 14, 2026.

CommunityRules and moderation

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Events in FrontenacAll events

Coming up in FrontenacAll events

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Schools

No public school is listed for Frontenac: either the NCES directory for Missouri is not loaded yet, or no school's address falls inside Frontenac’s boundary. Schools in neighbouring towns are on their pages.

Legislative districts

Legislative districts for Frontenac4
Congressional and state legislative districts for Frontenac
ChamberDistrictShare of Frontenac
U.S. House of RepresentativesCongressional District 1 (MO-1)16%
U.S. House of RepresentativesCongressional District 2 (MO-2)84%
State legislature, lower chamberState House District 89All
State legislature, upper chamberState Senate District 24100%

Boundaries from the Census Bureau’s TIGER/Line district files, matched to Frontenac’s own boundary; a town split between districts lists each with the share of its land inside it. Who holds each seat appears on the People page once the official records are approved.

Sources: Census cartographic boundaries 2025: congressional districts, 119th Congress, retrieved November 14, 2026; Census cartographic boundaries 2025: state legislative districts, upper chamber, state 29, retrieved November 14, 2026; Census cartographic boundaries 2025: state legislative districts, lower chamber, state 29, retrieved November 14, 2026.

Frequently asked about FrontenacPromoted from questions people asked

No question about Frontenac has been asked often enough to publish an answer yet. Ask Frontenac and the answer, once a person checks it, appears here.

Nearby towns

Other towns in St. Louis County

All towns in St. Louis County