O Fallon IL
188 active listings out of 9.8K total properties we track across 3 O Fallon ZIPs — listings, off-market homes, rentals, and full sales/tax history. Refreshed nightly.
While you're here, take in the bigger picture — maps below show Illinois (statewide), not just O Fallon. Same company, same dataset, different resolution.
Inventory breakdown
Distribution of the 188 currently-active listings in O Fallon, IL. Full dataset covers 9.8K properties — listings, off-market homes, rentals, and full history.
ZIP codes in O Fallon
Drill into any ZIP for hex-level breakdowns.
Nearby cities
Other Illinois cities within driving distance.
Get O Fallon, IL data in your app
GET https://api.straply.com/v1/markets/city/o-fallon-il
Authorization: Bearer $STRAPLY_KEY{
"city": "o-fallon-il",
"total_tracked": 9801,
"active": 188,
"median_list": 364000
}O Fallon, IL real estate: market summary
As of November 2026, Straply tracks 9,801 homes in O Fallon, IL, with 188 active for sale at a median list price of $364,000 (~$163/sq ft). Notably, most homes were built in the 2000s.
- Median list price
- $364,000
- Median $/sq ft
- $163
- Active listings
- 188
- Median sale price
- $385,000 (-7% YoY)
- Properties tracked
- 9,801
Frequently asked: O Fallon, IL real estate
What is the median home price in O Fallon?
The median list price in O Fallon, IL is $364,000 (about $163 per square foot), based on 188 active listings tracked by Straply as of November 2026.
What price range are homes in O Fallon?
Active listings in O Fallon, IL concentrate in: 40% under $300k and 40% $300k–$500k.
Are home prices in O Fallon going up or down?
The median sale price is $385,000, down 7% year over year. Straply tracked 198 sales here over the past 12 months.
How many homes are for sale in O Fallon?
Straply is tracking 188 active listings in O Fallon, IL out of 9,801 properties on record as of November 2026.
How old are the homes in O Fallon?
Most homes in O Fallon, IL were built in the 2000s. About 71% were built after 1980, while 5% predate 1940. The newest tracked home dates to 2026.
What types of homes are in O Fallon?
O Fallon, IL is mostly single-family homes (86% of listings).
How many bedrooms do homes in O Fallon typically have?
The most common size in O Fallon, IL is 4 bd.
What areas are near O Fallon?
Nearby markets Straply also tracks include Fairview Heights, Lebanon, Swansea, Caseyville.
Data as of November 2026. Source: Straply. For address-level history and programmatic access, use the Straply API.