Williamson County, IL Housing Market
The median sale price of a home in Williamson County was $180K last month, up 7.5% since last year. The median sale price per square foot in Williamson County is $118, up 12.4% since last year.
Williamson County Housing Market Trends
In May 2025, Williamson County home prices were up 7.5% compared to last year, selling for a median price of $180K. On average, homes in Williamson County sell after 59 days on the market compared to 63 days last year. There were 75 homes sold in May this year, down from 82 last year.

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View houses in Williamson County that sold recently
Recently sold homes
- $450,000 Last Sold Price4 beds3.5 baths2,340 sq ft1402 Nicole Ln, Carterville, IL 62918List Price$425,000Sale to List6% over listDays on Market14 days1402 Nicole Ln, Carterville, IL 62918
- $235,000 Last Sold Price3 beds2.5 baths1,604 sq ft1607 Marion St, Carterville, IL 62918List Price$239,900Sale to List2% under listDays on Market65 days1607 Marion St, Carterville, IL 62918
- $320,000 Last Sold Price4 beds3 baths2,303 sq ft6443 Roberts Rd, Marion, IL 62959List Price$330,000Sale to List3% under listDays on Market50 days6443 Roberts Rd, Marion, IL 62959
- $320,000 Last Sold Price3 beds2 baths2,808 sq ft502 E Mohan St, Carterville, IL 62918List Price$329,900Sale to List3% under listDays on Market265 days502 E Mohan St, Carterville, IL 62918
- $622,500 Last Sold Price6 beds3.5 baths5,006 sq ft511 David Livingstone Dr, Carterville, IL 62918List Price$614,900Sale to List1% over listDays on Market82 days511 David Livingstone Dr, Carterville, IL 62918
- $302,000 Last Sold Price4 beds3 baths2,628 sq ft1815 Wolff Dr, Marion, IL 62959List Price$319,900Sale to List6% under listDays on Market153 days1815 Wolff Dr, Marion, IL 62959
- $295,000 Last Sold Price3 beds2 baths1,865 sq ft1708 Felts Dr, Marion, IL 62959List Price$289,900Sale to List2% over listDays on Market83 days1708 Felts Dr, Marion, IL 62959
- $80,000 Last Sold Price2 beds1 bath1,160 sq ft313 N 18th St, Herrin, IL 62948List Price$80,000Sale to List0% over listDays on Market133 days313 N 18th St, Herrin, IL 62948
See all recently sold homes in Williamson County.
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Schools in Williamson County
- Elementary
- Middle
- High
GreatSchools Rating
9/10 Washington Elementary School Public • K-5 | 487 Students | N/A |
8/10 Tri-C Elementary K-4 Grade School Public • K-3 | 701 Students | 2 reviews |
8/10 Longfellow Elementary School Public • K-5 | 241 Students | 4 reviews |
8/10 Lincoln Elementary School Public • 3-4 | 139 Students | N/A |
8/10 Adams School Public • PreK-8 | 260 Students | N/A |
Climate's impact on Williamson County housing
Learn about natural hazards and environmental risks, such as floods, fires, wind, and heat that could impact homes in Williamson County.
Flood Factor - Minor
Flood Factor

Fire Factor - Moderate
Fire Factor

Wind Factor - Minor
Wind Factor

Wind likelihood over time
Heat Factor - Major
Heat Factor

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