Johnson County is a county located in the state of Illinois. As of 2000, the population is 12,878. Its county seat is Vienna, Illinois6.
According to the U.S. Census Bureau, the county has a total area of 904 km² (349 mi²). 893 km² (345 mi²) of it is land and 11 km² (4 mi²) of it is water. The total area is 1.22% water.
As of the census2 of 2000, there are 12,878 people, 4,183 households, and 3,053 families residing in the county. The population density is 14/km² (37/mi²). There are 5,046 housing units at an average density of 6/km² (15/mi²). The racial makeup of the county is 83.52% White, 14.17% Black or African American, 0.27% Native American, 0.13% Asian, 0.04% Pacific Islander, 1.07% from other races, and 0.79% from two or more races. 2.86% of the population are Hispanic or Latino of any race.
There are 4,183 households out of which 30.60% have children under the age of 18 living with them, 62.30% are married couples living together, 7.10% have a female householder with no husband present, and 27.00% are non-families. 24.20% of all households are made up of individuals and 12.10% have someone living alone who is 65 years of age or older. The average household size is 2.43 and the average family size is 2.87.
In the county the population is spread out with 18.30% under the age of 18, 11.40% from 18 to 24, 34.00% from 25 to 44, 22.70% from 45 to 64, and 13.60% who are 65 years of age or older. The median age is 37 years. For every 100 females there are 149.00 males. For every 100 females age 18 and over, there are 160.20 males.
The median income for a household in the county is $33,326, and the median income for a family is $40,275. Males have a median income of $29,415 versus $22,844 for females. The per capita income for the county is $17,990. 11.30% of the population and 8.10% of families are below the poverty line. Out of the total population, 11.30% of those under the age of 18 and 11.50% of those 65 and older are living below the poverty line.
Cities and towns
- New Burnside
|Regions of Illinois || |
|Chicagoland | Little Egypt |
|Largest Cities |
|Alton | Aurora | Belleville | Berwyn | Bloomington | Burbank | Calumet City | Champaign | Chicago | Crystal Lake | Decatur | DeKalb | Des Plaines | Elgin | Elmhurst | Evanston | Joliet | Moline | Naperville | Park Ridge | Peoria | Quincy | Rockford | Rock Island | Springfield | St. Charles | Urbana | Wheaton | Waukegan |
|Largest Towns and Villages |
|Addison | Arlington Heights | Bartlett | Bolingbrook | Buffalo Grove | Carol Stream | Carpentersville | Cicero | Downers Grove | Elk Grove Village | Glenview | Hoffman Estates | Lombard | Mount Prospect | Normal | Oak Lawn | Oak Park | Orland Park | Palatine | Schaumburg | Skokie | Tinley Park |
|Adams | Alexander | Bond | Boone | Brown | Bureau | Calhoun | Carroll | Cass | Champaign | Christian | Clark | Clay | Clinton | Coles | Cook | Crawford | Cumberland | DeKalb | DeWitt | Douglas | DuPage | Edgar | Edwards | Effingham | Fayette | Ford | Franklin | Fulton | Gallatin | Greene | Grundy | Hamilton | Hancock | Hardin | Henderson | Henry | Iroquois | Jackson | Jasper | Jefferson | Jersey | Jo Daviess | Johnson | Kane | Kankakee | Kendall | Knox | La Salle | Lake | Lawrence | Lee | Livingston | Logan | Macon | Macoupin | Madison | Marion | Marshall | Mason | Massac | McDonough | McHenry | McLean | Menard | Mercer | Monroe | Montgomery | Morgan | Moultrie | Ogle | Peoria | Perry | Piatt | Pike | Pope | Pulaski | Putnam | Randolph | Richland | Rock Island | Saline | Sangamon | Schuyler | Scott | Shelby | St. Clair | Stark | Stephenson | Tazewell | Union | Vermilion | Wabash | Warren | Washington | Wayne | White | Whiteside | Will | Williamson | Winnebago | Woodford |