Is O Fallon, MO 63368 a buyer’s or seller’s market?

The O Fallon housing market right now

In the three months ending August 31, 2026, 43% of homes in O Fallon, MO 63368 sold above their list price, the typical home went under contract in 16 days and there were 1.8 months of supply. Under four months of supply means sellers have the edge: expect competition for well-priced homes. That’s based on 205 home sales.

Compared with the same period a year earlier, the share selling over asking was about the same (44% then), homes sold more slowly (8 days then) and the median sale price rose 3% to $439,810. Overall, O Fallon is less competitive than a year ago, which gives buyers more room.

Within St. Charles County, homes here sell more slowly than in 55% of the county’s ZIP codes, and sell more often over asking than in 64%. On our competition score, O Fallon ranks #38 of 263 MO ZIP codes with enough sales (score 85 out of 100).

Nearby, buyers who want less competition could look at Portage Des Sioux 63373 (0% sold over asking) or Foristell 63348 (17% sold over asking), while O Fallon 63366 (54% sold over asking) and Saint Charles 63303 (48% sold over asking) are even more competitive.