|
A list of counties in Illinois and
related data including year formed, square miles of area, population,
and population density. |
County |
Formed |
Sq. Miles |
Pop* |
Maps |
Adams |
|
| |
|
Alexander |
|
|
|
|
Bond |
|
| |
|
Boone |
|
|
|
|
Brown |
|
| |
|
Bureau |
|
|
|
|
Calhoun |
|
| |
|
Carroll |
|
|
|
|
Cass |
|
| |
|
Champaign |
|
|
|
|
Christian |
|
| |
|
Clark |
|
|
|
|
Clay |
|
| |
|
Clinton |
|
|
|
|
Coles |
|
| |
|
Crawford
|
|
|
|
|
Cumberland
|
|
| |
|
DeKalb |
|
|
|
|
DeWitt |
| |
|
|
Douglas |
| |
|
|
Edgar |
| |
|
|
Edwards |
| |
|
|
Effingham
|
| |
|
|
Fayette
|
| |
|
|
Ford
|
| |
|
|
Franklin
|
| |
|
|
Fulton
|
| |
|
|
Gallatin
|
| |
|
|
Greene
|
| |
|
|
Grundy
|
| |
|
|
Hamilton
|
| |
|
|
Hancock
|
| |
|
|
Hardin
|
| |
|
|
Henderson
|
| |
|
|
Henry
|
| |
|
|
Iroquois
|
| |
|
|
Jackson
|
| |
|
|
Jasper
|
| |
|
|
Jefferson
|
| |
|
|
Jersey
|
| |
|
|
JoDaviess
|
| |
|
|
Johnson
|
| |
|
|
Kane
|
| |
|
|
Kankakee
|
| |
|
|
Kendall
|
| |
|
|
Knox
|
| |
|
|
Lake
|
| |
|
|
LaSalle
|
| |
|
|
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 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Total |
|
|
|
|
|
*2000 census density people per square
mile.. |
|
|
|
Related Links & Resources:
●
Illinois National Forests
●
Illinois National Parks
●
Illinois National Wildlife Refuges
●
Illinois Wildlife Management Areas
● Illinois
Lakes
●
●
●
|
|
|
|
|
|
|