O'Fallon is a city in St. Clair County, Illinois, home to about 32,262 people across 16 square miles. Its ZIP code is 62269, and parts of 62208, 62225 and 62254 are in O'Fallon too.
Homes sold for a median of $148 per square foot in the three months ending August 2026, a seller’s market.
Mostly O'Fallon; also Shiloh
Mostly Fairview Heights; part is in O'Fallon
Mostly Scott AFB; part is in O'Fallon
Mostly Lebanon; part is in O'Fallon
Each card is that ZIP code’s whole market, including any part outside O'Fallon. Seller’s market: under 4 months of supply; buyer’s market: over 6. Methodology
We’re writing up O'Fallon’s story and what everyday life there is like, for people thinking about moving in.
Are you a local agent who knows O'Fallon well? Agents who advertise here will be able to write the guide. Advertise on OfferBacked
| Nearest major airport | St. Louis Lambert International Airport (STL)28 miles away |
|---|---|
| Closer regional airport | Scott AFB/Midamerica Airport (BLV)4 miles away |
| Nearest city of 250,000+ | St. Louis, MO19 miles away |
| Nearest city of 1 million+ | Chicago, IL254 miles away |
Straight-line distances from the center of O'Fallon; 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.
O'Fallon had 32,289 residents in the 2020 census, up 47% since 2000.
It’s the 58th largest of 1,450 towns in Illinois by population.
St. Clair County grew from 86,685 residents in 1900 to 257,400 in 2020.
St. Clair County, 1900–2020
Source: U.S. Census Bureau decennial censuses (counties 1900–1990 from the Bureau’s historical county file).
Average highs peak around 90°F in summer, and winter lows average 24°F. About 43.4 inches of rain and melted snow fall in a typical year, with about 11 inches of snow.
Source: NOAA 1991–2020 climate normals, Belleville Siu Rsch, IL weather station (4 miles away).
72,871 jobs at 4,973 businesses in St. Clair County. The biggest industries by employees:
Source: U.S. Census Bureau County Business Patterns 2022 (private employers; jobs counted where people work).
620 doctors and other health care providers list an office in O'Fallon.
Nearest hospitals
Providers with an office here
| Primary care doctors | 73 |
|---|---|
| Specialist doctors | 132 |
| Dentists | 40 |
| Nurse practitioners and physician assistants | 134 |
| Mental health providers | 113 |
| Physical and occupational therapists | 68 |
| Optometrists | 11 |
| Chiropractors | 49 |
| Pharmacies | 15 |
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 (12 nearby)
Grocery stores (3 nearby)
Pharmacies (2 nearby)
Libraries (1 nearby)
Museums (1 nearby)
Theaters and performance venues
Counts are within about 2.5 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.
Established in 1854.
Notable people born here
Source: Wikidata (wikidata.org), the free knowledge base; people are listed by place of birth.
Public schools here are run by Central SD 104, O Fallon CCSD 90, Shiloh Village SD 85 and others. Check each district’s attendance zones for a specific address.
| School | Grades | Students | Type | Distance |
|---|---|---|---|---|
| Dawn Elser Elementary SchoolO Fallon | Pre-K–3 | 330 | Public | 3.2 mi |
| Delores Moye Elem SchoolO Fallon | Pre-K–5 | 595 | Public | 3.5 mi |
| Estelle Kampmeyer Elem SchoolO Fallon | Pre-K–5 | 465 | Public | 1.8 mi |
| J Emmett Hinchcliffe Sr Elem SchO Fallon | Pre-K–5 | 452 | Public | 2.4 mi |
| Laverna Evans Elem SchoolO Fallon | Pre-K–5 | 421 | Public | 0.6 mi |
| Marie Schaefer Elem SchoolO Fallon | Pre-K–5 | 598 | Public | 1.5 mi |
| Shiloh Elementary SchoolShiloh | Pre-K–3 | 245 | Public | 1.2 mi |
| Innovative Pathways ProgramO Fallon | 4–12 | — | Alternative Education | 3.2 mi |
| Joseph Arthur Middle SchoolO Fallon | 4–8 | 299 | Public | 3.4 mi |
| Shiloh Middle SchoolShiloh | 4–8 | 331 | Public | 1.0 mi |
| Amelia V Carriel Jr HighO Fallon | 6–8 | 664 | Public | 2.2 mi |
| Fulton Jr High SchoolO Fallon | 6–8 | 667 | Public | 3.4 mi |
| O Fallon High SchoolO Fallon | 9–12 | 2,540 | Public | 1.0 mi |
| School | Grades | Students | Affiliation | Distance |
|---|---|---|---|---|
| First Baptist AcademyO Fallon | K–12 | 310 | Baptist | 0.5 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.
Buying or selling around O'Fallon? Tell us what you need and when. No agents advertise here yet, so we’ll keep your request for up to 30 days and send it to local agents who join. No obligation, and you choose who to work with.
Loading map…
Shares ZIP codes with Fairview Heights, Shiloh, Lebanon and Scott AFB.
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.