Based on information submitted to the MLS GRID as of 2026-09-03 16:59:10 UTC. All data is obtained from various sources and may not have been verified by broker or MLS GRID. Supplied Open House Information is subject to change without notice. All information should be independently reviewed and verified for accuracy. Properties may or may not be listed by the office/agent presenting the information.
O'Fallon, IL community profile
Population
31,290
Median income
$101,491
Housing units
12,629
People per sq. mi.
1,967.9
Area
15.9 sq. mi.
Source: HJN community data
O'Fallon housing market
July 2026 · This period is still settling
Homes on the market · MLS, as of Jul 17, 2026–Jul 21, 2026
Median list price
$439,900
Homes for sale
81
Median days on market
28 days
Housing stock — every home in the area, not only the ones selling or listed · Assessor records, as of Jul 15, 2026
43
