O'Fallon, IL housing market
Homes typically sell in 37 days, close to asking.
Home values, sales, trends and how O'Fallon compares with the towns next door — updated as new data is published.
O'Fallon at a glance
A strong seller's market
Homes are selling faster than new ones are listed: less than two months of supply. Well-priced homes can draw several offers.
O'Fallon and its neighbors
| Town | Typical value | 1-yr change | Days on market | Median income |
|---|---|---|---|---|
| O'Fallon | — | — | 37 | $105,982 |
| Shiloh | $319K | +2% | 38 | $99,573 |
| O'Fallon | $316K | +2.5% | — | $100,136 |
| Fairview Heights | $199K | +1.5% | 30 | $80,930 |
| Caseyville | $114K | −3.1% | — | $87,204 |
| Swansea | $269K | +1.5% | 40 | $91,587 |
2.8 years of income
The typical O'Fallon home costs about 2.8 years of the town's median household income, less than across Illinois (3.6 years).
How O'Fallon ranks on affordability →
Home value ÷ ACS median household income.
Owners, rent & taxes
U.S. Census Bureau, ACS 2020-2024.
Home values: Zillow Home Value Index (ZHVI), Zillow Research. Sales, days on market and supply: Redfin Data Center, May 2026. Income, ownership, taxes and rent: U.S. Census Bureau, American Community Survey. Listings link to their publishers.