Williamson County, IL Map
Official Census boundary of Williamson County, Illinois (FIPS 17199). Turn on flood zones, contours, land cover and school districts, measure distances, or click any spot to inspect it.
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Williamson County Demographics
Source: U.S. Census Bureau, American Community Survey 2020-2024 5-year estimates.
Population
66,876
Households
28,983
Median household income
$65,604
Median age
41.6 years
Median home value
$156,400
Median gross rent
$930/mo
Owner-occupied homes
70.7%
Bachelor's degree or higher
26.2%
Below poverty level
13.8%
Land area
420.2 sq mi
Population density
159 / sq mi