Unshakable ZIP Data 63366 | O Fallon, MO Housing Market
O Fallon · Saint Charles County · St. Louis, MO-IL metro · Missouri · Data updated June 19, 2026
The median sale price in ZIP 63366, O Fallon, Missouri is $374,889 at $168 per square foot. 149 single-family homes sold in the latest period, down 11.1 percent from a year earlier. Homes sit a median of 6 days on market with 1.0 months of supply. Sellers are getting 100.8 percent of list price and 46.9 percent of homes sold above asking.
Seller's market. No room for sloppy offers.
Value anchors
| Metric | Value | Year over year |
|---|---|---|
| Average single-family value | $378,453 | |
| Average price per sq ft | $169 | |
| Median sale price | $374,889 | |
| Median sale price per sq ft | $168 | |
| Median home size | 2,237 sq ft | |
| Median new listing price | $376,779 | +7.7% |
| National size rank | 1,032 |
Sales activity
| Metric | Value | Year over year |
|---|---|---|
| Homes sold | 149 | -11.1% |
| Median days on market | 6 days | |
| Months of supply | 1.0 months | |
| New listings | 183 | +1.5% |
| Active listings | 222 | -9.8% |
| Pending sales | 181 | +7.4% |
Pricing power
| Metric | Value | Year over year |
|---|---|---|
| Average sale-to-list ratio | 100.8% | +0.3 pts |
| Share sold above list | 46.9% | +2.9 pts |
Bedroom value anchors
Average values by bedroom count. Value anchors for orientation, not appraisals.
2-bedroom
$267,142
3-bedroom
$349,427
4-bedroom
$449,315
5-bedroom
$520,486
These figures describe the single-family market for O Fallon, Missouri ZIP 63366. They are market context, not a substitute for sold comps or a formal appraisal.