County Dossier
DeKalb County
Illinois | County
Population
100,703
Land Area
631.3 sq mi
Context
Metro
Geography
County silhouette
- Land Area
- 631.3 sq mi
- Water Area
- 3.3 sq mi
- Water Share
- 0.5%
Terrain Layer
Open the county terrain view inside the atlas flow.
Population & Housing
Population
100,703
- Density
- 159.5 / sq mi
- Households
- 39,550
- Housing Units
- 41,678
- Median Age
- 32.7 years
Income & Economy
Median Household Income
$70,724
GDP
$5.66B
Real GDP Change+0.1%
- Per Capita Income
- $36,298
- Personal Income
- $5.57B
- Personal Income Per Capita
- $55,006
Classification
RUCC 1
Metro
Counties in metro areas of 1 million population or more
Relief
Min
446 ft
Mean
830 ft
Max
989 ft