Homes for Sale in O Fallon, IL
87 homes for sale ยท Updated November 9, 2026
Market snapshot for O Fallon, IL
- Median price
- $430,000
- Average price
- $441,105
- Highest price
- $1,750,000
- Avg price / sqft
- $168/sqft
- Avg home size
- 2,618 sqft
- Avg days on market
- 46
- Avg year built
- 1990
- Avg beds / baths
- 3.8 bd / 3.1 ba