Illinois, abbreviated "IL", is in the East North Central region of the U.S. Its capital is Springfield.
There were 12,419,293 people in Illinois as of the 2000 census.
The state ratified the US Constitution and officially became part of the country on December 3, 1818.
Please explore the cities and towns of Illinois, below.
If you don't find the city or town you want in the list here, you can find ALL cities and towns by navigating through these alphabetical links:
| City or Town | Pop. | County |
|---|---|---|
| Addison | 35,914 | Du Page |
| Algonquin | 23,276 | McHenry |
| Alsip | 19,725 | Cook |
| Alton | 30,496 | Madison |
| Arlington Heights | 76,031 | Cook |
| Aurora | 142,990 | Du Page |
| Bartlett | 36,706 | Cook |
| Batavia | 23,866 | Kane |
| Belleville | 41,410 | St Clair |
| Bellwood | 20,535 | Cook |
| Belvidere | 20,820 | Boone |
| Bensenville | 20,703 | Du Page |
| Berwyn | 54,016 | Cook |
| Bloomingdale | 21,675 | Du Page |
| Bloomington | 64,808 | McLean |
| Blue Island | 23,463 | Cook |
| Bolingbrook | 56,321 | Will |
| Bourbonnais | 15,256 | Kankakee |
| Bradley | 12,784 | Kankakee |
| Bridgeview | 15,335 | Cook |
| Brookfield | 19,085 | Cook |
| Buffalo Grove | 42,909 | Lake |
| Burbank | 27,902 | Cook |
| Burr Ridge | 10,408 | Du Page |
| Cahokia | 16,391 | St Clair |
| Calumet City | 39,071 | Cook |
| Canton | 15,288 | Fulton |
| Carbondale | 20,681 | Jackson |
| Carol Stream | 40,438 | Du Page |
| Carpentersville | 30,586 | Kane |
| Cary | 15,531 | McHenry |
| Centralia | 14,136 | Marion |
| Champaign | 67,518 | Champaign |
| Charleston | 21,039 | Coles |
| Chicago | 2,896,016 | Cook |
| Chicago Heights | 32,776 | Cook |
| Chicago Ridge | 14,127 | Cook |
| Cicero | 85,616 | Cook |
| Collinsville | 24,707 | Madison |
| Country Club Hills | 16,169 | Cook |
| Crest Hill | 13,329 | Will |
| Crestwood | 11,251 | Cook |
| Crystal Lake | 38,000 | McHenry |
| Danville | 33,904 | Vermilion |
| Darien | 22,860 | Du Page |
| Decatur | 81,860 | Macon |
| Deerfield | 18,420 | Lake |
| DeKalb | 39,018 | De Kalb |
| Des Plaines | 58,720 | Cook |
| Dixon | 15,941 | Lee |
| Dolton | 25,614 | Cook |
| Downers Grove | 48,724 | Du Page |
| East Moline | 20,333 | Rock Island |
| East Peoria | 22,638 | Tazewell |
| East St. Louis | 31,542 | St Clair |
| Edwardsville | 21,491 | Madison |
| Effingham | 12,384 | Effingham |
| Elgin | 94,487 | Kane |
| Elk Grove Village | 34,727 | Cook |
| Elmhurst | 42,762 | Du Page |
| Elmwood Park | 25,405 | Cook |
| Evanston | 74,239 | Cook |
| Evergreen Park | 20,821 | Cook |
| Fairview Heights | 15,034 | St Clair |
| Forest Park | 15,688 | Cook |
| Frankfort | 10,391 | Will |
| Franklin Park | 19,434 | Cook |
| Freeport | 26,443 | Stephenson |
| Galesburg | 33,706 | Knox |
| Geneva | 19,515 | Kane |
| Glen Carbon | 10,425 | Madison |
| Glen Ellyn | 26,999 | Du Page |
| Glendale Heights | 31,765 | Du Page |
| Glenview | 41,847 | Cook |
| Godfrey | 16,286 | Madison |
| Granite City | 31,301 | Madison |
| Grayslake | 18,506 | Lake |
| Gurnee | 28,834 | Lake |
| Hanover Park | 38,278 | Cook |
| Harvey | 30,000 | Cook |
| Hazel Crest | 14,816 | Cook |
| Herrin | 11,298 | Williamson |
| Hickory Hills | 13,926 | Cook |
| Highland Park | 31,365 | Lake |
| Hinsdale | 17,349 | Du Page |
| Hoffman Estates | 49,495 | Cook |
| Homewood | 19,543 | Cook |
| Jacksonville | 18,940 | Morgan |
| Joliet | 106,221 | Will |
| Justice | 12,193 | Cook |
| Kankakee | 27,491 | Kankakee |
| Kewanee | 12,944 | Henry |
| La Grange | 15,608 | Cook |
| La Grange Park | 13,295 | Cook |
| Lake in the Hills | 23,152 | McHenry |
| Lake Forest | 20,059 | Lake |
| Lake Zurich | 18,104 | Lake |
| Lansing | 28,332 | Cook |
| Lemont | 13,098 | Cook |
| Libertyville | 20,742 | Lake |
| Lincoln | 15,369 | Logan |
| Lincolnwood | 12,359 | Cook |
| Lindenhurst | 12,539 | Lake |
| Lisle | 21,182 | Du Page |
| Lockport | 15,191 | Will |
| Lombard | 42,322 | Du Page |
| Loves Park | 20,044 | Winnebago |
| Machesney Park | 20,759 | Winnebago |
| Macomb | 18,558 | McDonough |
| Marion | 16,035 | Williamson |
| Markham | 12,620 | Cook |
| Matteson | 12,928 | Cook |
| Mattoon | 18,291 | Coles |
| Maywood | 26,987 | Cook |
| McHenry | 21,501 | McHenry |
| Melrose Park | 23,171 | Cook |
| Midlothian | 14,315 | Cook |
| Mokena | 14,583 | Will |
| Moline | 43,768 | Rock Island |
| Morris | 11,928 | Grundy |
| Morton | 15,198 | Tazewell |
| Morton Grove | 22,451 | Cook |
| Mount Prospect | 56,265 | Cook |
| Mount Vernon | 16,269 | Jefferson |
| Mundelein | 30,935 | Lake |
| Murphysboro | 13,295 | Jackson |
| Naperville | 128,358 | Du Page |
| New Lenox | 17,771 | Will |
| Niles | 30,068 | Cook |
| Normal | 45,386 | McLean |
| Norridge | 14,582 | Cook |
| North Aurora | 10,585 | Kane |
| North Chicago | 35,918 | Lake |
| Northbrook | 33,435 | Cook |
| Northlake | 11,878 | Cook |
| Oak Forest | 28,051 | Cook |
| Oak Lawn | 55,245 | Cook |
| Oak Park | 52,524 | Cook |
| O'Fallon | 21,910 | St Clair |
| Orland Park | 51,077 | Cook |
| Oswego | 13,326 | Kendall |
| Ottawa | 18,307 | La Salle |
| Palatine | 65,479 | Cook |
| Palos Heights | 11,260 | Cook |
| Palos Hills | 17,665 | Cook |
| Park Forest | 23,462 | Cook |
| Park Ridge | 37,775 | Cook |
| Pekin | 33,857 | Tazewell |
| Peoria | 112,936 | Peoria |
| Plainfield | 13,038 | Will |
| Pontiac | 11,864 | Livingston |
| Prospect Heights | 17,081 | Cook |
| Quincy | 40,366 | Adams |
| Rantoul | 12,857 | Champaign |
| Richton Park | 12,533 | Cook |
| River Forest | 11,635 | Cook |
| River Grove | 10,668 | Cook |
| Riverdale | 15,055 | Cook |
| Rock Island | 39,684 | Rock Island |
| Rockford | 150,115 | Winnebago |
| Rolling Meadows | 24,604 | Cook |
| Romeoville | 21,153 | Will |
| Roselle | 23,115 | Du Page |
| Round Lake Beach | 25,859 | Lake |
| Sauk Village | 10,411 | Cook |
| Schaumburg | 75,386 | Cook |
| Schiller Park | 11,850 | Cook |
| Skokie | 63,348 | Cook |
| South Elgin | 16,100 | Kane |
| South Holland | 22,147 | Cook |
| Springfield | 111,454 | Sangamon |
| St. Charles | 27,896 | Kane |
| Sterling | 15,451 | Whiteside |
| Streamwood | 36,407 | Cook |
| Streator | 14,190 | La Salle |
| Summit | 10,637 | Cook |
| Swansea | 10,579 | St Clair |
| Sycamore | 12,020 | De Kalb |
| Taylorville | 11,427 | Christian |
| Tinley Park | 48,401 | Cook |
| Urbana | 36,395 | Champaign |
| Vernon Hills | 20,120 | Lake |
| Villa Park | 22,075 | Du Page |
| Warrenville | 13,363 | Du Page |
| Washington | 10,841 | Tazewell |
| Waukegan | 87,901 | Lake |
| West Chicago | 23,469 | Du Page |
| Westchester | 16,824 | Cook |
| Western Springs | 12,493 | Cook |
| Westmont | 24,554 | Du Page |
| Wheaton | 55,416 | Du Page |
| Wheeling | 34,496 | Cook |
| Wilmette | 27,651 | Cook |
| Winnetka | 12,419 | Cook |
| Wood Dale | 13,535 | Du Page |
| Wood River | 11,296 | Madison |
| Woodridge | 30,934 | Du Page |
| Woodstock | 20,151 | McHenry |
| Worth | 11,047 | Cook |
| Zion | 22,866 | Lake |
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