County Dossier
Johnson County
Illinois | County
Population
13,376
Land Area
343.7 sq mi
Context
Nonmetro
Geography
County silhouette
- Land Area
- 343.7 sq mi
- Water Area
- 4.9 sq mi
- Water Share
- 1.4%
Terrain Layer
Open the county terrain view inside the atlas flow.
Population & Housing
Population
13,376
- Density
- 38.9 / sq mi
- Households
- 4,101
- Housing Units
- 5,541
- Median Age
- 41.4 years
Income & Economy
Median Household Income
$62,528
GDP
$328.89M
Real GDP Change+4.4%
- Per Capita Income
- $27,765
- Personal Income
- $586.91M
- Personal Income Per Capita
- $44,062
Classification
RUCC 8
Nonmetro
Urban population of fewer than 5,000, adjacent to a metro area
Relief
Min
237 ft
Mean
501 ft
Max
857 ft