Home values, rents and more in O Fallon, IL
September 2026 figures from Zillow and the U.S. Census Bureau · updated 2026-11-07
Open O Fallon in ProMap- Under $180k
- $180k–$190k
- $190k–$230k
- $230k–$300k
- $300k+
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How O Fallon compares
The typical home in O Fallon, IL is worth about $315,000, according to the Zillow Home Value Index for September 2026. Home values in O Fallon are 15% above the typical value in the St. Louis metro area ($273,000) and 14% below the U.S. typical value ($366,000).
Over the past year, home values in O Fallon rose 2.6%, compared with +3.3% in the St. Louis metro area and +1.2% nationally.
Typical rent is $1,631 a month (Zillow Observed Rent Index), 14% above the St. Louis metro area ($1,427) and 16% below the U.S. ($1,932). Rents rose 6.7% over the past year.
The median household income is $105,982, against $80,196 in the St. Louis metro area and $80,734 in the U.S. (Census Bureau, American Community Survey 2020–24).
About 32,262 people live in O Fallon (American Community Survey 2020–24).
O Fallon has the 63rd-highest typical home value of the 231 cities in the St. Louis metro area and the 219th-highest of 1,005 in Illinois with Zillow figures.
Part of: St. Clair County, IL · St. Louis metro area · Illinois
More for O Fallon in ProMap Plus
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- 5- and 10-year price changes
- Days on market and months of supply
- Price cuts and sale-to-list ratio
- Price-to-income and monthly cost to buy
- Crime rates
- Homeowners insurance premiums
- Commute time to downtown
- Flood, wildfire and natural hazard risk
- Property-tax rate
- 2024 presidential vote
- Age, education and household make-up
- Amenities and transit nearby
Nearby cities
ZIP codes in O Fallon, IL
Sources
Home values: Zillow Home Value Index (ZHVI), all homes, middle tier, smoothed and seasonally adjusted, September 2026. Rents: Zillow Observed Rent Index (ZORI), seasonally adjusted. Population: Census population estimates (July 2025) for states, metros and counties; ACS 2020–24 for cities and ZIP codes. Income: U.S. Census Bureau, ACS 2020–24 5-year estimates. Boundaries: U.S. Census Bureau cartographic boundary files. Compiled by Home Economics.
"Typical" is Zillow's middle-tier value (homes between the 35th and 65th percentiles), not a median sale price. Changes are over the 12 months to September 2026.