O'Fallon, St. Clair County, Illinois
City in St. Clair County, Illinois · ZIP 62269
- St. Clair County
- Within O'Fallon Township
- Census data · ACS 2019-2023
- 10 public schools
- 32,169 (2024 estimate)Population
- 12,461Households
- $102,793Median household income
- $274,100Median home value
- 10Public schools
- 1ZIP codes
About O'Fallon
This page shows only what has been published about O'Fallon: 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 | 21,910 |
| 2010 | 28,281 |
| 2020 | 32,289 |
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 17, retrieved November 14, 2026; Census 2010 Summary File 1: total population, place level, state 17, retrieved November 14, 2026; Census 2020 Redistricting Data (P.L. 94-171): total population, place level, state 17, retrieved November 14, 2026.
Median household income $102,793 · 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 17, retrieved November 14, 2026.
- Owner occupied
- 8,833 units
- Renter occupied
- 3,628 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, place level, state 17, retrieved November 14, 2026.
| Measure | O'Fallon | St. Clair County | Illinois |
|---|---|---|---|
| Population | 32,139 | 254,777 | 12,692,653 |
| Median household income | $102,793 | $70,178 | $81,702 |
| Median age | 36.9 | 39.5 | 38.9 |
| Median home value | $274,100 | $168,800 | $250,500 |
| Bachelor’s degree or higher | 51.3% | 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 | 26.1 minutes | 24.7 minutes | 28.1 minutes |
Source: American Community Survey 5-year data profile 2019–2023, place level, state 17, retrieved November 14, 2026.
CommunityRules and moderation
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Events in O'FallonAll events
No upcoming event is listed in O'Fallon yet. Members and businesses add events from the Events page; each is screened before it shows.
Schools
| School | Type | Grades | District |
|---|---|---|---|
| Dawn Elser Elementary School | Public | Pre-K–4 | Central SD 104 |
| Delores Moye Elem School | Public | Pre-K–5 | O Fallon CCSD 90 |
| Estelle Kampmeyer Elem School | Public | Pre-K–5 | O Fallon CCSD 90 |
| J Emmett Hinchcliffe Sr Elem Sch | Public | Pre-K–5 | O Fallon CCSD 90 |
| Laverna Evans Elem School | Public | Pre-K–5 | O Fallon CCSD 90 |
| Marie Schaefer Elem School | Public | Pre-K–5 | O Fallon CCSD 90 |
| Amelia V Carriel Jr High | Public | 6–8 | O Fallon CCSD 90 |
| Fulton Jr High School | Public | 6–8 | O Fallon CCSD 90 |
| Joseph Arthur Middle School | Public | 5–8 | Central SD 104 |
| O Fallon High School | Public | 9–12 | O Fallon Twp HSD 203 |
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.
Frequently asked about O'FallonPromoted from questions people asked
No question about O'Fallon has been asked often enough to publish an answer yet. Ask O'Fallon and the answer, once a person checks it, appears here.
Nearby towns
- O'Fallon TownshipTownship
- ShilohVillage
- Caseyville TownshipTownship
- Fairview HeightsCity
- SwanseaVillage
- Scott AFBCensus designated place
- Shiloh Valley TownshipTownship
- St. Clair TownshipTownship
- LebanonCity
- CaseyvilleVillage
Other towns in St. Clair County
- BellevilleCity
- BrooklynVillage
- Cahokia HeightsCity
- Canteen TownshipTownship
- CaseyvilleVillage
- Caseyville TownshipTownship
- Centreville TownshipTownship
- DarmstadtCensus designated place
- DupoVillage
- East CarondeletVillage
Other places named O'Fallon in Illinois
- O'Fallon TownshipTownship