- 3 bd
- 2 ba
- 1,500 sqft

The average Williamson County, IL home value is $157,730, up 0.1% over the past year, and homes go to pending in around 19 days. (Updated on )
Zillow Home Value Index (ZHVI), built from the ground up by measuring monthly changes in property level Zestimates, captures both the level and home values across a wide variety of geographies and housing types.
Typical Home Values: $157,730
1-Year Value Change: +0.1%
(Data through September 30, 2026)
Zillow is more than a place to browse homes. It’s a place to connect with a local agent, explore financing solutions, schedule home tours, understand your buying and selling power, and more.
The median home value in Williamson County, IL is $157,730 as of September 2026. This represents a 0.2% decrease compared to last month and a 0.1% increase year-over-year.
The median home value in Williamson County, IL ($157,730) compares to Illinois ($295,943) and the U.S. national median ($366,157).
The cities with the highest median home values in Williamson County, IL include: Creal Springs ($206,873), Crainville ($201,181), Carterville ($187,434), Marion ($182,275), Energy ($159,227). These cities represent the most expensive areas within the county.