County Dossier
Williamson County
Illinois | County
Population
66,876
Land Area
420.2 sq mi
Context
Nonmetro
Geography
County silhouette
- Land Area
- 420.2 sq mi
- Water Area
- 24.1 sq mi
- Water Share
- 5.4%
Terrain Layer
Open the county terrain view inside the atlas flow.
Population & Housing
Population
66,876
- Density
- 159.1 / sq mi
- Households
- 28,983
- Housing Units
- 32,084
- Median Age
- 41.6 years
Income & Economy
Median Household Income
$65,604
GDP
$3.99B
Real GDP Change+2.3%
- Per Capita Income
- $37,284
- Personal Income
- $3.92B
- Personal Income Per Capita
- $58,380
Classification
RUCC 5
Nonmetro
Urban population of 20,000 or more, not adjacent to a metro area
Relief
Min
352 ft
Mean
465 ft
Max
721 ft