O'Fallon, MO Housing Market 2026: What Homes Actually Sell For

If you invest in or around O'Fallon, the number that matters is what homes actually close for, not what sellers are asking. Here is what O'Fallon sale prices look like right now, built from the closings Resideline tracked over the last six months, as of August 2026.

The snapshot

• •Closings tracked, last 6 months: 439
• •Median sold price, last 6 months: $375,000
• •Median sold $/sqft, last 6 months: $171
• •Middle half of sales closed between: $300,000 and $453,700

What the numbers say

Resideline tracked 439 closed sales in O'Fallon over the last six months, with a median closing price of $375,000. That median is the midpoint of what buyers actually paid, not what sellers hoped to get, which is why it moves differently from the asking prices you see on listing sites. The middle half of those sales closed between $300,000 and $453,700. That spread matters more than the headline median: where a specific property sits inside it decides whether the citywide number helps you or misleads you. These are the closings Resideline tracks and may differ from complete county or municipal records. 88% of the O'Fallon closings we track here are single-family houses, so these figures primarily reflect that segment, and the citywide $/sqft figure primarily reflects that segment as well. Across the 439 closings with usable living area, the middle half sold between $146 and $208 per square foot.

Figures last updated August 22, 2026 from closings Resideline tracked.

Median home price in O'Fallon, MO (August 2026)

The median home price in O'Fallon is $375,000, measured across the 439 closed sales Resideline tracked over the last six months. The middle half of those sales closed between $300,000 and $453,700.

Where O'Fallon sale prices land

Medians hide the shape of a market. The distribution above covers the closed sales Resideline tracked in O'Fallon over the last six months, trimmed to the 5th through 95th percentile, with the middle half of sales closing between $300,000 and $453,700. Where your target property sits inside that spread matters more than the citywide median.

How long a sale takes here

• •Listed to under contract: a median of 6 days, across 404 O'Fallon closings Resideline tracked in the last six months
• •Contract to closing: a median of 29 days, across 392 O'Fallon closings Resideline tracked in the last six months

The O'Fallon angle

Depth paired with a compact band shapes how pricing work should go in O'Fallon. $375,000 therefore sits close to the sales it summarises, and you have plenty of closings available to improve on it. Use the depth to hold your filters. A compact band magnifies matching errors, because a comp off on living area or condition eats a large share of the whole middle range, and a strong sample means you rarely have to accept one. Match property type and size, then condition, and relax distance last. Keep the shape in mind: the ground above $375,000 covers more than the ground below it, so upper-portion subjects deserve comps from that side rather than an adjustment applied to the midpoint.

From market read to offer price

A market read is the backdrop. The decision still comes down to one property and one number: what it is actually worth and what you should pay. Every Resideline report opens with this same market snapshot for the subject's exact ZIP code, then gives you the property's value, the sold comps behind it, and a market rent estimate. Pricing a specific deal? The free ARV calculator and rental property calculator run the numbers in about a minute.

And we show our work. Every estimate is frozen while the home is for sale and graded against the real closing price after it sells. As of August 2026, the public scoreboard showed 3.26% median error across 11,465+ graded closings. See the live accuracy dashboard for the receipts, or read how the Area Market Snapshot works.

Run any O'Fallon address through Resideline and you will see the local market and the property's value together, in one report.

Cite this

Using these numbers? Please cite the source and the sample size:

Source: Resideline Market Watch
Market: O'Fallon, MO
Data updated: August 2026
Analysis period: last six months
Tracked closings: 439
Median sold price: $375,000
Median sold $/sqft: $171 (439 qualifying)
Property mix: 88% houses
https://resideline.com/blog/ofallon-mo-housing-market

The local market statistics in this report are calculated from closed sales tracked by Resideline. Transaction coverage may differ from complete county or municipal records.

Every local market figure on this page is computed from closed sales Resideline tracked in O'Fallon over the last six months, and is refreshed when the data is.