Home › Counties › Williamson County, IL
The median home value in Williamson County, IL is $157,901 as of 2026-08-31, up 0.03% from a year earlier.
Median Home Value
$157,901
Year-over-Year
+0.03%
National Rank
#2502 of 3071
Williamson County ranks 54th out of 102 counties in IL by median home price, and is -32.8% below the U.S. national median of $235,072. Within IL, the typical county has a median home value of $158,585, making Williamson County -0.4% below the IL state median.
The typical home value decreased by 0.4%, from $158,465 in May 2026 to $157,901 in Aug 2026.
Monthly Zillow Home Value Index snapshots retained by HomePriceMap. A short history is shown now and grows automatically as each new monthly release arrives.
| Month | Typical home value | Year-over-year change |
|---|---|---|
| May 2026 | $158,465 | -0.0% |
| Jun 2026 | $161,773 | -0.5% |
| Jul 2026 | $159,235 | -0.4% |
| Aug 2026 | $157,901 | +0.0% |
Households here earn a median of $65,604 a year against a typical home value of $157,901 — a price-to-income ratio of 2.4×, comfortably below the 3× income level generally considered manageable. That is less affordable than roughly 11% of U.S. counties. (How this is calculated.)
Reporting agencies in Williamson County recorded a violent crime rate of 435 per 100,000 residents in 2024 — around the middle of the national range. Property crime runs at 2,767 per 100,000.
Based on 2 reporting cities covering 28,981 residents (FBI UCR data — what this covers).
The median home value in Williamson County is $157,901. That's up 0.03% from a year earlier. That is about 32.8% below the U.S. national county median of $235,072, and makes Williamson County the 54th most expensive of 102 counties in Illinois.
Median household income here is $65,604, so a typical home costs about 2.4× annual household earnings — relatively affordable compared with other U.S. counties.
Reporting police departments in Williamson County recorded 435 violent crimes per 100,000 residents. That figure covers 28,981 residents across 2 reporting cities, so it reflects the county's incorporated areas rather than every community within its borders.
Brown County · Fayette County · Rock Island County · Ford County · Bureau County · Randolph County · Iroquois County · Clark County