St. Clair Township, Illinois
Township in St. Clair County, Illinois · ZIP 62220, 62221, 62223
- St. Clair County
- Census data · ACS 2019-2023
- 5 public schools
- 35,560 (2024 estimate)Population
- 14,664Households
- $76,643Median household income
- $190,200Median home value
- 5Public schools
- 4ZIP codes
About St. Clair Township
This page shows only what has been published about St. Clair Township: 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
| Census | Population |
|---|---|
| 2000 | 31,798 |
| 2010 | 35,498 |
| 2020 | 35,758 |
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, county subdivision level, state 17, retrieved November 14, 2026; Census 2010 Summary File 1: total population, county subdivision level, state 17, retrieved November 14, 2026; Census 2020 Redistricting Data (P.L. 94-171): total population, county subdivision level, state 17, retrieved November 14, 2026.
Median household income $76,643 · 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, county subdivision level, state 17, retrieved November 14, 2026.
- Owner occupied
- 10,394 units
- Renter occupied
- 4,270 units
- Vacancy rate
- 5.3%
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, county subdivision level, state 17, retrieved November 14, 2026.
| Measure | St. Clair Township | St. Clair County | Illinois |
|---|---|---|---|
| Population | 35,602 | 254,777 | 12,692,653 |
| Median household income | $76,643 | $70,178 | $81,702 |
| Median age | 40.9 | 39.5 | 38.9 |
| Median home value | $190,200 | $168,800 | $250,500 |
| Bachelor’s degree or higher | 36.3% | 30.7% | 37.2% |
| Foreign-born residents | 4.2% | 3.2% | 14.4% |
| Owner-occupied homes | 70.9% | 67.8% | 66.8% |
| Mean commute to work | 24.6 minutes | 24.7 minutes | 28.1 minutes |
Source: American Community Survey 5-year data profile 2019–2023, county subdivision level, state 17, retrieved November 14, 2026.
CommunityRules and moderation
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Events in St. Clair TownshipAll events
No upcoming event is listed in St. Clair Township yet. Members and businesses add events from the Events page; each is screened before it shows.
Schools
| School | Type | Grades | District |
|---|---|---|---|
| High Mount Elem School | Public | Pre-K–8 | High Mount SD 116 |
| Whiteside Elem School | Public | Pre-K–4 | Whiteside SD 115 |
| Wolf Branch Elem School | Public | Pre-K–4 | Wolf Branch SD 113 |
| Whiteside Middle School | Public | 5–8 | Whiteside SD 115 |
| Wolf Branch Middle School | Public | 5–8 | Wolf Branch SD 113 |
Open public schools in the NCES directory for 2023–2024, placed by their listed location; private schools are not in the source. Enrollment and ratings are not shown.
Sources: NCES Common Core of Data, public school directory 2023–2024, retrieved November 14, 2026; NCES EDGE public school geocodes 2024–2025, retrieved November 14, 2026.
Legislative districts
| Chamber | District | Share of St. Clair Township |
|---|---|---|
| U.S. House of Representatives | Congressional District 13 (IL-13) | 99% |
| State legislature, lower chamber | State House District 112 | 4% |
| State legislature, lower chamber | State House District 113 | 96% |
| State legislature, upper chamber | State Senate District 56 | 4% |
| State legislature, upper chamber | State Senate District 57 | 96% |
Boundaries from the Census Bureau’s TIGER/Line district files, matched to St. Clair Township’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 17, retrieved November 14, 2026; Census cartographic boundaries 2025: state legislative districts, lower chamber, state 17, retrieved November 14, 2026.
Frequently asked about St. Clair TownshipPromoted from questions people asked
No question about St. Clair Township has been asked often enough to publish an answer yet. Ask St. Clair Township and the answer, once a person checks it, appears here.
Places in St. Clair Township
- SwanseaVillage
Nearby towns
- SwanseaVillage
- BellevilleCity
- ShilohVillage
- Fairview HeightsCity
- O'FallonCity
- Shiloh Valley TownshipTownship
- Caseyville TownshipTownship
- Stookey TownshipTownship
- RentchlerCensus designated place
- Smithton TownshipTownship
Other towns in St. Clair County
- BellevilleCity
- BrooklynVillage
- Cahokia HeightsCity
- Canteen TownshipTownship
- CaseyvilleVillage
- Caseyville TownshipTownship
- Centreville TownshipTownship
- DarmstadtCensus designated place
- DupoVillage
- East CarondeletVillage