County Dossier
McHenry County
Illinois | County
Population
312,591
Land Area
603.4 sq mi
Context
Metro
Geography
County silhouette
- Land Area
- 603.4 sq mi
- Water Area
- 7.7 sq mi
- Water Share
- 1.3%
Terrain Layer
Open the county terrain view inside the atlas flow.
Population & Housing
Population
312,591
- Density
- 518.0 / sq mi
- Households
- 117,594
- Housing Units
- 121,329
- Median Age
- 40.7 years
Income & Economy
Median Household Income
$104,802
GDP
$15.98B
Real GDP Change+2.0%
- Per Capita Income
- $49,388
- Personal Income
- $22.80B
- Personal Income Per Capita
- $72,162
Classification
RUCC 1
Metro
Counties in metro areas of 1 million population or more
Relief
Min
726 ft
Mean
872 ft
Max
1,184 ft