Williamson County, IL Real Estate & Property Data
Last Updated: August 30, 2025
With up-to-date real estate data get detailed insight into Williamson County, IL sourced from the nation’s leading property data provider. ATTOM’s Williamson County real estate data indicates that the county has 5 properties in foreclosure.
Total Residential Properties
29,406
Total Commercial Properties
2,950
Avg. Home Age
(Single Family Home)
61 Years
Avg. Square Feet
(Single Family Home)
1,570
Total 2025 Residential Sales
(year-to-date)
N/A
% of Homes Seriously Underwater
(Q3 2025)
N/A
Total 2024 Residential Sales
N/A
% of Equity Rich Homes
(Q3 2025)
N/A
Effective 2024 Property Tax
1.46%
Total Foreclosure Filings
(year-to-date)
27
Williamson County, IL Real Estate Overview
The median home value in Williamson County, IL is $158,729. There are a total of 29,406 residential properties in the Williamson.
Number of Homes Sold
i
- June '25 Jun '25 N/A
- May '25 May '25 N/A
- April '25 Apr '25 N/A
- March '25 Mar '25 N/A
- February '25 Feb '25 N/A
- January '25 Jan '25 N/A
- December '24 Dec '24 N/A
- November '24 Nov '24 N/A
- October '24 Oct '24 N/A
- September '24 Sep '24 N/A
- August '24 Aug '24 N/A
- July '24 Jul '24 N/A
Williamson County, IL Real Estate Market Overview
Last 30 days-
CityMedian Est. Value
-
CityMedian Est. Value
-
CityMedian Est. Value
-
$96,066 $92.44/sqft
-
$158,729 $101.11/sqft
-
$200,008 $117.57/sqft
-
$101,370 $74.77/sqft
-
$209,922 $149.09/sqft
-
$168,520 $105.35/sqft
-
$55,283 $43.22/sqft
-
$109,714 $74.73/sqft
-
$70,015 $57.91/sqft
-
$92,940 $68.6/sqft
-
$181,846 $110.31/sqft
-
$167,518 $114.66/sqft
Williamson County, IL Foreclosure Activity
There were a total of 5 Williamson County, IL properties with a foreclosure filing in June 2025.
Total Foreclosure Filings
i
5
(Jun 2025)
-28.6%
year-over-year
y-o-y
Foreclosure Starts
i
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