From Wikipedia, the free encyclopedia
Map of the United States with Illinois highlighted
Illinois is a state located in the Midwestern United States. According to the 2010 United States Census, Illinois is the 5th most populous state with 12,831,549 inhabitants but the 24th largest by land area spanning 55,518.93 square miles (143,793.4 km2) of land.[1] Illinois is divided into 102 counties and contains 1,299 incorporated municipalities consisting of cities, towns, and villages.[2]
List of incorporated cities
1 - Chicago
2 - Aurora
3 - Rockford
4 - Joliet
5 - Naperville
6 - Springfield
7 - Peoria
8 - Elgin
9 - Waukegan
10 - Champaign
11 - Bloomington
12 - Decatur
13 - Evanston
14 - Des Plaines
15 - Berwyn
State capital and county seat ‡
County seat†
Name
|
Population
|
County
|
Abingdon
|
3,319
|
Knox
|
Albion†
|
1,988
|
Edwards
|
Aledo†
|
3,640
|
Mercer
|
Altamont
|
2,319
|
Effingham
|
Alton
|
27,865
|
Madison
|
Amboy
|
2,500
|
Lee
|
Anna
|
4,442
|
Union
|
Arcola
|
2,916
|
Douglas
|
Ashley
|
536
|
Washington
|
Assumption
|
1,168
|
Christian
|
Athens
|
1,988
|
Menard
|
Atlanta
|
1,692
|
Logan
|
Auburn
|
4,771
|
Sangamon
|
Aurora
|
197,899
|
DuPage
|
Kane
|
Kendall
|
Will
|
Ava
|
654
|
Jackson
|
Barry
|
1,318
|
Pike
|
Batavia
|
26,045
|
DuPage
|
Kane
|
Beardstown
|
6,123
|
Cass
|
Belleville†
|
44,478
|
St. Clair
|
Belvidere†
|
25,585
|
Boone
|
Benld
|
1,556
|
Macoupin
|
Benton†
|
7,087
|
Franklin
|
Berwyn
|
56,657
|
Cook
|
Bloomington†
|
76,610
|
McLean
|
Blue Island
|
23,706
|
Cook
|
Braidwood
|
6,191
|
Will
|
Breese
|
4,442
|
Clinton
|
Bridgeport
|
1,886
|
Lawrence
|
Brookport
|
984
|
Massac
|
Bunker Hill
|
1,774
|
Macoupin
|
Burbank
|
28,925
|
Cook
|
Bushnell
|
3,117
|
McDonough
|
Byron
|
3,753
|
Ogle
|
Cairo†
|
2,831
|
Alexander
|
Calumet City
|
37,042
|
Cook
|
Canton
|
14,704
|
Fulton
|
Carbondale
|
25,902
|
Jackson
|
Carlinville†
|
5,917
|
Macoupin
|
Carlyle†
|
3,281
|
Clinton
|
Carmi†
|
5,240
|
White
|
Carrollton†
|
2,484
|
Greene
|
Carterville
|
5,496
|
Williamson
|
Carthage†
|
2,605
|
Hancock
|
Casey
|
2,769
|
Clark
|
Cumberland
|
Centralia
|
13,032
|
Clinton
|
Jefferson
|
Marion
|
Washington
|
Centreville
|
5,309
|
St. Clair
|
Champaign
|
81,055
|
Champaign
|
Charleston†
|
21,838
|
Coles
|
Chenoa
|
1,785
|
McLean
|
Chester†
|
8,586
|
Randolph
|
Chicago†
|
2,695,598
|
Cook
|
DuPage
|
Chicago Heights
|
30,276
|
Cook
|
Chillicothe
|
6,097
|
Peoria
|
Chrisman
|
1,343
|
Edgar
|
Christopher
|
2,382
|
Franklin
|
Clinton†
|
7,225
|
DeWitt
|
Coffeen
|
685
|
Montgomery
|
Colchester
|
1,401
|
McDonough
|
Collinsville
|
25,579
|
Madison
|
St. Clair
|
Colona
|
5,099
|
Henry
|
Columbia
|
9,707
|
Monroe
|
St. Clair
|
Country Club Hills
|
16,541
|
Cook
|
Countryside
|
5,895
|
Cook
|
Creal Springs
|
543
|
Williamson
|
Crest Hill
|
20,837
|
Will
|
Crystal Lake
|
40,743
|
McHenry
|
Cuba
|
1,294
|
Fulton
|
Dallas City
|
945
|
Hancock
|
Henderson
|
Danville†
|
33,027
|
Vermilion
|
Darien
|
22,086
|
DuPage
|
Decatur†
|
76,122
|
Macon
|
DeKalb
|
43,862
|
DeKalb
|
Delavan
|
1,689
|
Tazewell
|
Des Plaines
|
58,364
|
Cook
|
Dixon†
|
15,733
|
Lee
|
Du Quoin
|
6,109
|
Perry
|
Earlville
|
1,701
|
LaSalle
|
East Dubuque
|
1,704
|
Jo Daviess
|
East Moline
|
21,302
|
Rock Island
|
East Peoria
|
23,402
|
Tazewell
|
East St. Louis
|
27,006
|
St. Clair
|
Edwardsville†
|
24,293
|
Madison
|
Effingham†
|
12,328
|
Effingham
|
El Paso
|
2,810
|
McLean
|
Woodford
|
Eldorado
|
4,122
|
Saline
|
Elgin
|
108,188
|
Cook
|
Kane
|
Elmhurst
|
44,121
|
Cook
|
DuPage
|
Elmwood
|
2,097
|
Peoria
|
Eureka†
|
5,295
|
Woodford
|
Evanston
|
74,486
|
Cook
|
Fairbury
|
3,757
|
Livingston
|
Fairfield†
|
5,154
|
Wayne
|
Fairview Heights
|
17,078
|
St. Clair
|
Farmer City
|
2,037
|
DeWitt
|
Farmington
|
2,448
|
Fulton
|
Flora
|
5,070
|
Clay
|
Freeport†
|
25,638
|
Stephenson
|
Fulton
|
3,481
|
Whiteside
|
Galena†
|
3,429
|
Jo Daviess
|
Galesburg†
|
32,195
|
Knox
|
Galva
|
2,589
|
Henry
|
Geneseo
|
6,586
|
Henry
|
Geneva†
|
21,495
|
Kane
|
Genoa
|
5,193
|
DeKalb
|
Georgetown
|
3,474
|
Vermilion
|
Gibson City
|
3,407
|
Ford
|
Gillespie
|
3,319
|
Macoupin
|
Gilman
|
1,814
|
Iroquois
|
Girard
|
2,103
|
Macoupin
|
Golconda†
|
668
|
Pope
|
Grafton
|
674
|
Jersey
|
Grand Tower
|
605
|
Jackson
|
Granite City
|
29,849
|
Madison
|
Grayville
|
1,666
|
Edwards
|
White
|
Greenfield
|
1,071
|
Greene
|
Greenville†
|
7,000
|
Bond
|
Griggsville
|
1,226
|
Pike
|
Hamilton
|
2,951
|
Hancock
|
Harrisburg†
|
9,017
|
Saline
|
Harvard
|
9,447
|
McHenry
|
Harvey
|
25,282
|
Cook
|
Havana†
|
3,301
|
Mason
|
Henry
|
2,464
|
Marshall
|
Herrin
|
12,501
|
Williamson
|
Hickory Hills
|
14,049
|
Cook
|
Highland
|
9,919
|
Madison
|
Highland Park
|
29,763
|
Lake
|
Highwood
|
5,405
|
Lake
|
Hillsboro†
|
6,207
|
Montgomery
|
Hometown
|
4,349
|
Cook
|
Hoopeston
|
5,351
|
Vermilion
|
Hurst
|
795
|
Williamson
|
Jacksonville†
|
19,446
|
Morgan
|
Jerseyville†
|
8,465
|
Jersey
|
Johnston City
|
3,543
|
Williamson
|
Joliet†
|
147,433
|
Kendall
|
Will
|
Jonesboro†
|
1,821
|
Union
|
Kankakee†
|
27,537
|
Kankakee
|
Keithsburg
|
609
|
Mercer
|
Kewanee
|
12,916
|
Henry
|
Kinmundy
|
796
|
Marion
|
Knoxville
|
2,911
|
Knox
|
La Harpe
|
1,235
|
Hancock
|
Lacon†
|
1,937
|
Marshall
|
Lake Forest
|
19,375
|
Lake
|
Lanark
|
1,457
|
Carroll
|
LaSalle
|
9,609
|
LaSalle
|
Lawrenceville†
|
4,348
|
Lawrence
|
Le Roy
|
3,560
|
McLean
|
Lebanon
|
4,418
|
St. Clair
|
Leland Grove
|
1,503
|
Sangamon
|
Lewistown†
|
2,384
|
Fulton
|
Lexington
|
2,060
|
McLean
|
Lincoln†
|
14,504
|
Logan
|
Litchfield
|
6,939
|
Montgomery
|
Lockport
|
24,839
|
Will
|
Loves Park
|
23,996
|
Boone
|
Winnebago
|
Macomb†
|
19,288
|
McDonough
|
Macon
|
1,138
|
Macon
|
Madison
|
3,891
|
Madison
|
St. Clair
|
Marengo
|
7,648
|
McHenry
|
Marion†
|
17,193
|
Williamson
|
Markham
|
12,508
|
Cook
|
Maroa
|
1,801
|
Macon
|
Marquette Heights
|
2,824
|
Tazewell
|
Marseilles
|
5,094
|
LaSalle
|
Marshall†
|
3,933
|
Clark
|
Martinsville
|
1,167
|
Clark
|
Mascoutah
|
7,483
|
St. Clair
|
Mason City
|
2,343
|
Mason
|
Mattoon
|
18,555
|
Coles
|
McHenry
|
26,992
|
McHenry
|
McLeansboro†
|
2,883
|
Hamilton
|
Mendota
|
7,372
|
LaSalle
|
Metropolis†
|
6,537
|
Massac
|
Minonk
|
2,078
|
Woodford
|
Moline
|
43,483
|
Rock Island
|
Momence
|
3,310
|
Kankakee
|
Monmouth†
|
9,444
|
Warren
|
Monticello†
|
5,548
|
Piatt
|
Morris†
|
13,636
|
Grundy
|
Morrison†
|
4,188
|
Whiteside
|
Mound City†
|
588
|
Pulaski
|
Mounds
|
810
|
Pulaski
|
Mount Carmel†
|
7,284
|
Wabash
|
Mount Carroll†
|
1,717
|
Carroll
|
Mount Olive
|
2,099
|
Macoupin
|
Mount Pulaski
|
1,566
|
Logan
|
Mount Sterling†
|
2,025
|
Brown
|
Mount Vernon†
|
15,277
|
Jefferson
|
Murphysboro†
|
7,970
|
Jackson
|
Naperville
|
141,853
|
DuPage
|
Will
|
Nashville†
|
3,258
|
Washington
|
Nason
|
236
|
Jefferson
|
Nauvoo
|
1,149
|
Hancock
|
Neoga
|
1,636
|
Cumberland
|
New Boston
|
683
|
Mercer
|
Newman
|
865
|
Douglas
|
Newton†
|
2,849
|
Jasper
|
Nokomis
|
2,256
|
Montgomery
|
North Chicago
|
32,574
|
Lake
|
Northlake
|
12,323
|
Cook
|
O'Fallon
|
28,281
|
St. Clair
|
Oak Forest
|
27,962
|
Cook
|
Oakbrook Terrace
|
2,134
|
DuPage
|
Oakland
|
880
|
Coles
|
Oglesby
|
3,791
|
LaSalle
|
Olney†
|
9,115
|
Richland
|
Oneida
|
700
|
Knox
|
Oregon†
|
3,721
|
Ogle
|
Orient
|
358
|
Franklin
|
Ottawa†
|
18,768
|
LaSalle
|
Palos Heights
|
12,515
|
Cook
|
Palos Hills
|
17,484
|
Cook
|
Pana
|
5,847
|
Christian
|
Paris†
|
8,837
|
Edgar
|
Park City
|
7,570
|
Lake
|
Park Ridge
|
37,480
|
Cook
|
Paxton†
|
4,473
|
Ford
|
Pekin†
|
34,094
|
Tazewell
|
Peoria†
|
115,007
|
Peoria
|
Peru
|
10,295
|
LaSalle
|
Petersburg†
|
2,260
|
Menard
|
Pinckneyville†
|
5,648
|
Perry
|
Pittsfield†
|
4,576
|
Pike
|
Plano
|
10,856
|
Kendall
|
Polo
|
2,355
|
Ogle
|
Pontiac†
|
11,931
|
Livingston
|
Princeton†
|
7,660
|
Bureau
|
Prophetstown
|
2,080
|
Whiteside
|
Prospect Heights
|
16,256
|
Cook
|
Quincy†
|
40,633
|
Adams
|
Red Bud
|
3,698
|
Randolph
|
Robinson†
|
7,713
|
Crawford
|
Rochelle
|
9,574
|
Ogle
|
Rock Falls
|
9,266
|
Whiteside
|
Rock Island†
|
39,018
|
Rock Island
|
Rockford†
|
152,871
|
Winnebago
|
Rolling Meadows
|
24,099
|
Cook
|
Roodhouse
|
1,814
|
Greene
|
Rosiclare
|
1,160
|
Hardin
|
Rushville†
|
3,192
|
Schuyler
|
St. Charles
|
32,974
|
DuPage
|
Kane
|
St. Elmo
|
1,426
|
Fayette
|
St. Francisville
|
697
|
Lawrence
|
Salem†
|
7,485
|
Marion
|
Sandwich
|
7,421
|
DeKalb
|
Kendall
|
LaSalle
|
Savanna
|
3,062
|
Carroll
|
Sesser
|
1,931
|
Franklin
|
Shawneetown†
|
1,239
|
Gallatin
|
Shelbyville†
|
4,700
|
Shelby
|
Silvis
|
7,479
|
Rock Island
|
South Beloit
|
7,892
|
Winnebago
|
Sparta
|
4,302
|
Randolph
|
Spring Valley
|
5,558
|
Bureau
|
Springfield††
|
116,250
|
Sangamon
|
Staunton
|
5,139
|
Macoupin
|
Sterling
|
15,370
|
Whiteside
|
Streator
|
13,710
|
LaSalle
|
Livingston
|
Sullivan†
|
4,440
|
Moultrie
|
Sumner
|
3,174
|
Lawrence
|
Sycamore†
|
17,519
|
DeKalb
|
Taylorville†
|
11,246
|
Christian
|
Toluca
|
1,414
|
Marshall
|
Toulon†
|
1,292
|
Stark
|
Trenton
|
2,715
|
Clinton
|
Troy
|
9,888
|
Madison
|
Tuscola†
|
4,480
|
Douglas
|
Urbana†
|
41,250
|
Champaign
|
Vandalia†
|
7,042
|
Fayette
|
Venice
|
1,890
|
Madison
|
Vienna†
|
1,434
|
Johnson
|
Villa Grove
|
2,537
|
Douglas
|
Virden
|
3,425
|
Macoupin
|
Sangamon
|
Virginia†
|
1,611
|
Cass
|
Wamac
|
1,185
|
Clinton
|
Marion
|
Washington
|
Warrenville
|
13,140
|
DuPage
|
Warsaw
|
1,607
|
Hancock
|
Washington
|
15,134
|
Tazewell
|
Waterloo†
|
9,811
|
Monroe
|
Watseka†
|
5,255
|
Iroquois
|
Waukegan†
|
89,078
|
Lake
|
Waverly
|
1,307
|
Morgan
|
Wenona
|
1,056
|
LaSalle
|
Marshall
|
West Chicago
|
27,086
|
DuPage
|
West Frankfort
|
8,182
|
Franklin
|
West Peoria
|
4,458
|
Peoria
|
Wheaton†
|
52,894
|
DuPage
|
White Hall
|
2,520
|
Greene
|
Wilmington
|
5,724
|
Will
|
Winchester†
|
1,593
|
Scott
|
Windsor
|
1,187
|
Shelby
|
Witt
|
903
|
Montgomery
|
Wood Dale
|
13,770
|
DuPage
|
Wood River
|
10,657
|
Madison
|
Woodstock†
|
24,770
|
McHenry
|
Wyoming
|
1,429
|
Stark
|
Yorkville†
|
16,921
|
Kendall
|
Zeigler
|
1,801
|
Franklin
|
Zion
|
24,413
|
Lake
|
See also
References
External links