All counties in the State of Illinois.
| Name | Status | Population census 2000-04-01 | Population estimate 2005-07-01 | Population estimate 2009-07-01 | |
|---|---|---|---|---|---|
| Adams | County | 68,277 | 66,750 | 67,054 | o |
| Alexander | County | 9,590 | 8,629 | 7,914 | o |
| Bond | County | 17,633 | 18,120 | 18,103 | o |
| Boone | County | 41,784 | 49,455 | 54,020 | o |
| Brown | County | 6,950 | 6,681 | 6,591 | o |
| Bureau | County | 35,503 | 34,756 | 34,699 | o |
| Calhoun | County | 5,084 | 5,117 | 5,019 | o |
| Carroll | County | 16,674 | 16,001 | 15,749 | o |
| Cass | County | 13,695 | 13,602 | 13,559 | o |
| Champaign | County | 179,668 | 187,870 | 195,671 | o |
| Christian | County | 35,372 | 34,786 | 34,253 | o |
| Clark | County | 17,008 | 16,827 | 16,657 | o |
| Clay | County | 14,422 | 13,924 | 13,538 | o |
| Clinton | County | 35,527 | 35,987 | 36,368 | o |
| Coles | County | 53,196 | 52,038 | 52,065 | o |
| Cook | County | 5,376,837 | 5,268,513 | 5,287,037 | o |
| Crawford | County | 20,452 | 19,754 | 19,433 | o |
| Cumberland | County | 11,253 | 10,841 | 10,716 | o |
| De Witt (DeWitt) | County | 16,800 | 16,400 | 16,034 | o |
| DeKalb | County | 88,975 | 99,485 | 107,333 | o |
| Douglas | County | 19,922 | 19,652 | 19,169 | o |
| DuPage | County | 904,163 | 922,589 | 932,541 | o |
| Edgar | County | 19,704 | 18,946 | 18,471 | o |
| Edwards | County | 6,971 | 6,647 | 6,444 | o |
| Effingham | County | 34,264 | 34,384 | 34,424 | o |
| Fayette | County | 21,802 | 21,139 | 20,935 | o |
| Ford | County | 14,241 | 13,975 | 13,911 | o |
| Franklin | County | 39,029 | 39,381 | 39,312 | o |
| Fulton | County | 38,250 | 37,121 | 36,652 | o |
| Gallatin | County | 6,445 | 6,069 | 5,705 | o |
| Greene | County | 14,761 | 14,102 | 13,567 | o |
| Grundy | County | 37,535 | 43,443 | 48,421 | o |
| Hamilton | County | 8,621 | 8,277 | 8,096 | o |
| Hancock | County | 20,125 | 19,036 | 18,359 | o |
| Hardin | County | 4,800 | 4,617 | 4,358 | o |
| Henderson | County | 8,213 | 7,780 | 7,354 | o |
| Henry | County | 51,018 | 49,838 | 49,314 | o |
| Iroquois | County | 31,334 | 30,331 | 29,690 | o |
| Jackson | County | 59,627 | 59,095 | 58,103 | o |
| Jasper | County | 10,117 | 9,787 | 9,530 | o |
| Jefferson | County | 40,045 | 40,097 | 39,944 | o |
| Jersey | County | 21,668 | 22,181 | 22,549 | o |
| Jo Daviess | County | 22,289 | 22,244 | 21,990 | o |
| Johnson | County | 12,880 | 13,486 | 13,730 | o |
| Kane | County | 404,119 | 475,350 | 511,892 | o |
| Kankakee | County | 103,833 | 108,453 | 113,215 | o |
| Kendall | County | 54,563 | 79,054 | 104,821 | o |
| Knox | County | 55,838 | 52,729 | 51,648 | o |
| La Salle | County | 111,546 | 111,660 | 112,498 | o |
| Lake | County | 644,587 | 691,815 | 712,567 | o |
| Lawrence | County | 15,452 | 16,730 | 16,408 | o |
| Lee | County | 36,062 | 34,863 | 34,919 | o |
| Livingston | County | 39,678 | 38,236 | 37,777 | o |
| Logan | County | 31,192 | 30,211 | 29,776 | o |
| Macon | County | 114,706 | 109,582 | 108,204 | o |
| Macoupin | County | 49,019 | 48,416 | 47,774 | o |
| Madison | County | 258,957 | 264,911 | 268,457 | o |
| Marion | County | 41,691 | 39,688 | 39,008 | o |
| Marshall | County | 13,156 | 12,934 | 12,702 | o |
| Mason | County | 16,037 | 15,450 | 14,785 | o |
| Massac | County | 15,161 | 15,211 | 14,970 | o |
| McDonough | County | 32,913 | 32,930 | 32,770 | o |
| McHenry | County | 260,094 | 301,741 | 320,961 | o |
| McLean | County | 150,433 | 159,374 | 167,699 | o |
| Menard | County | 12,486 | 12,394 | 12,466 | o |
| Mercer | County | 16,953 | 16,554 | 16,276 | o |
| Monroe | County | 27,619 | 31,300 | 33,236 | o |
| Montgomery | County | 30,644 | 29,958 | 29,500 | o |
| Morgan | County | 36,619 | 35,662 | 34,897 | o |
| Moultrie | County | 14,287 | 14,338 | 14,392 | o |
| Ogle | County | 51,032 | 53,935 | 55,336 | o |
| Peoria | County | 183,435 | 182,105 | 185,816 | o |
| Perry | County | 23,095 | 22,569 | 22,424 | o |
| Piatt | County | 16,367 | 16,495 | 16,550 | o |
| Pike | County | 17,379 | 16,719 | 16,273 | o |
| Pope | County | 4,413 | 4,107 | 3,991 | o |
| Pulaski | County | 7,348 | 6,663 | 6,218 | o |
| Putnam | County | 6,086 | 5,973 | 6,009 | o |
| Randolph | County | 33,893 | 33,015 | 32,686 | o |
| Richland | County | 16,287 | 15,841 | 15,523 | o |
| Rock Island | County | 149,388 | 146,451 | 146,826 | o |
| Saline | County | 26,733 | 25,961 | 25,738 | o |
| Sangamon | County | 188,958 | 192,622 | 195,716 | o |
| Schuyler | County | 7,189 | 7,065 | 6,730 | o |
| Scott | County | 5,534 | 5,333 | 5,193 | o |
| Shelby | County | 22,893 | 22,033 | 21,803 | o |
| St. Clair | County | 256,055 | 258,849 | 263,617 | o |
| Stark | County | 6,332 | 6,094 | 6,019 | o |
| Stephenson | County | 48,979 | 47,290 | 46,537 | o |
| Tazewell | County | 128,484 | 129,176 | 132,466 | o |
| Union | County | 18,293 | 18,100 | 18,005 | o |
| Vermilion | County | 83,924 | 81,696 | 80,067 | o |
| Wabash | County | 12,937 | 12,412 | 11,997 | o |
| Warren | County | 18,739 | 17,704 | 17,409 | o |
| Washington | County | 15,148 | 14,820 | 14,560 | o |
| Wayne | County | 17,151 | 16,640 | 16,294 | o |
| White | County | 15,371 | 14,975 | 14,661 | o |
| Whiteside | County | 60,651 | 59,175 | 58,961 | o |
| Will | County | 502,210 | 631,397 | 685,251 | o |
| Williamson | County | 61,294 | 63,493 | 65,169 | o |
| Winnebago | County | 278,422 | 289,422 | 299,702 | o |
| Woodford | County | 35,469 | 37,025 | 38,862 | o |
| Illinois | Federal State | 12,419,658 | 12,674,452 | 12,910,409 |
Contents: All incorporated places in the State of Illinois.
| Name | Status | County | Population census 2000-04-01 | Population estimate 2005-07-01 | Population estimate 2009-07-01 | |
|---|---|---|---|---|---|---|
| Abingdon | City | Knox | 3,612 | 3,339 | 3,256 | o |
| Addieville | Village | Washington | 267 | 257 | 249 | o |
| Addison | Village | DuPage | 36,376 | 36,735 | 36,918 | o |
| Adeline | Village | Ogle | 139 | 143 | 141 | o |
| Albany | Village | Whiteside | 904 | 905 | 925 | o |
| Albers | Village | Clinton | 856 | 966 | 1,054 | o |
| Albion | City | Edwards | 1,937 | 1,853 | 1,797 | o |
| Aledo | City | Mercer | 3,613 | 3,458 | 3,512 | o |
| Alexis | Village | 866 | 816 | 791 | o | |
| Algonquin | Village | 22,954 | 29,014 | 30,347 | o | |
| Alhambra | Village | Madison | 638 | 643 | 643 | o |
| Allendale | Village | Wabash | 528 | 499 | 480 | o |
| Allenville | Village | Moultrie | 154 | 150 | 147 | o |
| Allerton | Village | 293 | 280 | 272 | o | |
| Alma | Village | Marion | 386 | 372 | 364 | o |
| Alorton | Village | St. Clair | 2,749 | 2,615 | 2,546 | o |
| Alpha | Village | Henry | 726 | 695 | 680 | o |
| Alsey | Village | Scott | 243 | 234 | 228 | o |
| Alsip | Village | Cook | 19,725 | 18,887 | 18,580 | o |
| Altamont | City | Effingham | 2,285 | 2,249 | 2,251 | o |
| Alto Pass | Village | Union | 388 | 387 | 379 | o |
| Alton | City | Madison | 30,489 | 29,524 | 29,264 | o |
| Altona | Village | Knox | 570 | 537 | 523 | o |
| Alvin | Village | Vermilion | 316 | 314 | 308 | o |
| Amboy | City | Lee | 2,630 | 2,560 | 2,557 | o |
| Anchor | Village | McLean | 175 | 171 | 173 | o |
| Andalusia | Village | Rock Island | 1,081 | 1,077 | 1,100 | o |
| Andover | Village | Henry | 594 | 575 | 562 | o |
| Anna | City | Union | 5,158 | 5,047 | 4,942 | o |
| Annawan | Town | Henry | 870 | 906 | 897 | o |
| Antioch | Village | Lake | 8,909 | 12,180 | 13,811 | o |
| Apple River | Village | Jo Daviess | 379 | 368 | 356 | o |
| Arcola | City | Douglas | 2,846 | 2,811 | 2,725 | o |
| Arenzville | Village | Cass | 419 | 408 | 399 | o |
| Argenta | Village | Macon | 930 | 854 | 825 | o |
| Arlington | Village | Bureau | 211 | 204 | 201 | o |
| Arlington Heights | Village | 76,429 | 73,903 | 73,153 | o | |
| Armington | Village | Tazewell | 368 | 354 | 350 | o |
| Aroma Park | Village | Kankakee | 822 | 802 | 837 | o |
| Arrowsmith | Village | McLean | 298 | 286 | 291 | o |
| Arthur | Village | 2,223 | 2,167 | 2,116 | o | |
| Ashkum | Village | Iroquois | 724 | 694 | 680 | o |
| Ashland | Village | Cass | 1,361 | 1,345 | 1,317 | o |
| Ashley | City | Washington | 613 | 577 | 564 | o |
| Ashmore | Village | Coles | 809 | 769 | 751 | o |
| Ashton | Village | Lee | 1,142 | 1,179 | 1,154 | o |
| Assumption | City | Christian | 1,261 | 1,219 | 1,186 | o |
| Astoria | Village | Fulton | 1,193 | 1,142 | 1,122 | o |
| Athens | City | Menard | 1,730 | 1,756 | 1,778 | o |
| Atkinson | Town | Henry | 1,001 | 961 | 949 | o |
| Atlanta | City | Logan | 1,649 | 1,654 | 1,635 | o |
| Atwood | Village | 1,312 | 1,255 | 1,216 | o | |
| Auburn | City | Sangamon | 4,449 | 4,408 | 4,445 | o |
| Augusta | Village | Hancock | 657 | 622 | 597 | o |
| Aurora | City | 143,325 | 165,787 | 172,950 | o | |
| Ava | City | Jackson | 662 | 667 | 636 | o |
| Aviston | Village | Clinton | 1,234 | 1,529 | 1,719 | o |
| Avon | Village | Fulton | 915 | 867 | 847 | o |
| Baldwin | Village | Randolph | 434 | 419 | 406 | o |
| Banner | Village | Fulton | 149 | 145 | 142 | o |
| Bannockburn | Village | Lake | 1,429 | 1,823 | 1,886 | o |
| Bardolph | Village | McDonough | 253 | 238 | 229 | o |
| Barrington | Village | 10,174 | 10,045 | 10,334 | o | |
| Barrington Hills | Village | 3,942 | 4,223 | 4,375 | o | |
| Barry | City | Pike | 1,368 | 1,308 | 1,269 | o |
| Bartelso | Village | Clinton | 602 | 590 | 575 | o |
| Bartlett | Village | 36,753 | 38,186 | 42,770 | o | |
| Bartonville | Village | Peoria | 6,336 | 6,132 | 6,217 | o |
| Basco | Village | Hancock | 107 | 101 | 97 | o |
| Batavia | City | 24,271 | 26,703 | 27,700 | o | |
| Batchtown | Village | Calhoun | 218 | 215 | 209 | o |
| Bath | Village | Mason | 310 | 302 | 288 | o |
| Bay View Gardens | Village | Woodford | 379 | 366 | 371 | o |
| Baylis | Village | Pike | 265 | 251 | 240 | o |
| Beach Park | Village | Lake | 10,130 | 12,304 | 13,177 | o |
| Beardstown | City | Cass | 5,803 | 5,785 | 5,849 | o |
| Beaverville | Village | Iroquois | 391 | 375 | 373 | o |
| Beckemeyer | Village | Clinton | 1,070 | 1,066 | 1,061 | o |
| Bedford Park | Village | Cook | 574 | 542 | 530 | o |
| Beecher | Village | Will | 2,114 | 2,727 | 3,077 | o |
| Beecher City | Village | Effingham | 493 | 496 | 489 | o |
| Belgium | Village | Vermilion | 465 | 469 | 459 | o |
| Belknap | Village | Johnson | 133 | 137 | 138 | o |
| Belle Prairie City | Town | Hamilton | 60 | 58 | 57 | o |
| Belle Rive | Village | Jefferson | 371 | 375 | 372 | o |
| Belleville | City | St. Clair | 42,385 | 41,064 | 41,285 | o |
| Bellevue | Village | Peoria | 1,894 | 1,825 | 1,825 | o |
| Bellflower | Village | McLean | 405 | 387 | 392 | o |
| Bellmont | Village | Wabash | 297 | 292 | 281 | o |
| Bellwood | Village | Cook | 20,535 | 19,336 | 18,853 | o |
| Belvidere | City | Boone | 21,089 | 24,204 | 26,406 | o |
| Bement | Village | Piatt | 1,784 | 1,722 | 1,703 | o |
| Benld | City | Macoupin | 1,541 | 1,467 | 1,448 | o |
| Bensenville | Village | 20,714 | 20,349 | 20,158 | o | |
| Benson | Village | Woodford | 408 | 403 | 409 | o |
| Bentley | Town | Hancock | 43 | 41 | 39 | o |
| Benton | City | Franklin | 6,936 | 6,912 | 6,910 | o |
| Berkeley | Village | Cook | 5,245 | 4,959 | 4,885 | o |
| Berlin | Village | Sangamon | 149 | 148 | 144 | o |
| Berwyn | City | Cook | 54,016 | 50,984 | 49,664 | o |
| Bethalto | Village | Madison | 9,562 | 9,700 | 9,961 | o |
| Bethany | Village | Moultrie | 1,290 | 1,249 | 1,225 | o |
| Big Rock | Village | 916 | 961 | 978 | o | |
| Biggsville | Village | Henderson | 343 | 322 | 301 | o |
| Bingham | Village | Fayette | 117 | 117 | 116 | o |
| Birds | Village | Lawrence | 51 | 51 | 49 | o |
| Bishop Hill | Village | Henry | 123 | 119 | 116 | o |
| Bismarck | Village | Vermilion | 544 | 549 | 551 | o |
| Blandinsville | Village | McDonough | 772 | 722 | 693 | o |
| Bloomingdale | Village | DuPage | 21,724 | 21,751 | 21,858 | o |
| Bloomington | City | McLean | 65,448 | 70,186 | 74,184 | o |
| Blue Island | City | Cook | 23,463 | 22,611 | 22,247 | o |
| Blue Mound | Village | Macon | 1,129 | 1,051 | 1,017 | o |
| Bluffs | Village | Scott | 751 | 721 | 701 | o |
| Bluford | Village | Jefferson | 785 | 768 | 763 | o |
| Bolingbrook | Village | 56,384 | 68,330 | 70,881 | o | |
| Bondville | Village | Champaign | 455 | 458 | 443 | o |
| Bone Gap | Village | Edwards | 272 | 261 | 252 | o |
| Bonfield | Village | Kankakee | 371 | 379 | 387 | o |
| Bonnie | Village | Jefferson | 424 | 420 | 419 | o |
| Bourbonnais | Village | Kankakee | 15,331 | 17,352 | 19,119 | o |
| Bowen | Village | Hancock | 535 | 505 | 484 | o |
| Braceville | Village | Grundy | 792 | 807 | 835 | o |
| Bradford | Village | Stark | 787 | 756 | 742 | o |
| Bradley | Village | Kankakee | 13,023 | 13,848 | 15,070 | o |
| Braidwood | City | Will | 5,232 | 6,218 | 6,785 | o |
| Breese | City | Clinton | 4,087 | 4,217 | 4,288 | o |
| Bridgeport | City | Lawrence | 2,168 | 2,141 | 2,050 | o |
| Bridgeview | Village | Cook | 15,336 | 14,846 | 15,006 | o |
| Brighton | Village | 2,189 | 2,280 | 2,356 | o | |
| Brimfield | Village | Peoria | 933 | 900 | 912 | o |
| Broadlands | Village | Champaign | 319 | 314 | 310 | o |
| Broadview | Village | Cook | 8,264 | 7,782 | 7,575 | o |
| Broadwell | Village | Logan | 174 | 172 | 167 | o |
| Brocton | Village | Edgar | 322 | 301 | 291 | o |
| Brookfield | Village | Cook | 19,085 | 18,298 | 17,969 | o |
| Brooklyn | Village | St. Clair | 676 | 639 | 622 | o |
| Brookport | City | Massac | 1,054 | 1,054 | 1,036 | o |
| Broughton | Village | Hamilton | 196 | 190 | 186 | o |
| Browning | Village | Schuyler | 130 | 128 | 121 | o |
| Browns | Village | Edwards | 175 | 167 | 162 | o |
| Brownstown | Village | Fayette | 715 | 710 | 704 | o |
| Brussels | Village | Calhoun | 147 | 143 | 139 | o |
| Bryant | Village | Fulton | 255 | 248 | 242 | o |
| Buckingham | Village | Kankakee | 237 | 230 | 242 | o |
| Buckley | Village | Iroquois | 593 | 569 | 550 | o |
| Buckner | Village | Franklin | 477 | 491 | 488 | o |
| Buda | Village | Bureau | 592 | 571 | 562 | o |
| Buffalo | Village | Sangamon | 491 | 465 | 453 | o |
| Buffalo Grove | Village | 43,221 | 42,464 | 42,852 | o | |
| Bull Valley | Village | McHenry | 1,012 | 1,042 | 1,129 | o |
| Bulpitt | Village | Christian | 206 | 197 | 191 | o |
| Buncombe | Village | Johnson | 186 | 192 | 192 | o |
| Bunker Hill | City | Macoupin | 1,809 | 1,774 | 1,731 | o |
| Burbank | City | Cook | 27,902 | 27,367 | 27,467 | o |
| Bureau Junction | Village | Bureau | 368 | 358 | 353 | o |
| Burlington | Village | Kane | 590 | 616 | 626 | o |
| Burnham | Village | Cook | 4,170 | 4,046 | 3,954 | o |
| Burnt Prairie | Village | White | 58 | 57 | 56 | o |
| Burr Ridge | Village | 10,736 | 11,230 | 11,413 | o | |
| Bush | Village | Williamson | 257 | 263 | 264 | o |
| Bushnell | City | McDonough | 3,260 | 3,056 | 2,936 | o |
| Butler | Village | Montgomery | 197 | 194 | 189 | o |
| Byron | City | Ogle | 3,013 | 3,626 | 3,851 | o |
| Cabery | Village | 248 | 247 | 244 | o | |
| Cahokia | Village | St. Clair | 16,391 | 15,491 | 15,103 | o |
| Cairo | City | Alexander | 3,632 | 3,280 | 2,996 | o |
| Caledonia | Village | Boone | 201 | 219 | 225 | o |
| Calhoun | Village | Richland | 222 | 217 | 212 | o |
| Calumet City | City | Cook | 39,076 | 37,461 | 36,619 | o |
| Calumet Park | Village | Cook | 8,519 | 8,055 | 7,953 | o |
| Camargo | Village | Douglas | 467 | 502 | 502 | o |
| Cambria | Village | Williamson | 1,333 | 1,342 | 1,354 | o |
| Cambridge | Village | Henry | 2,180 | 2,092 | 2,085 | o |
| Camden | Village | Schuyler | 97 | 95 | 91 | o |
| Camp Point | Village | Adams | 1,256 | 1,200 | 1,205 | o |
| Campbell Hill | Village | Jackson | 333 | 321 | 305 | o |
| Campton Hills | Village | Kane | 9,149 | 9,583 | 9,779 | o |
| Campus | Village | Livingston | 145 | 145 | 140 | o |
| Canton | City | Fulton | 15,318 | 14,731 | 14,498 | o |
| Cantrall | Village | Sangamon | 139 | 137 | 133 | o |
| Capron | Village | Boone | 1,116 | 1,467 | 1,707 | o |
| Carbon Cliff | Village | Rock Island | 1,681 | 1,655 | 1,646 | o |
| Carbon Hill | Village | Grundy | 392 | 400 | 421 | o |
| Carbondale | City | Jackson | 26,257 | 25,801 | 26,235 | o |
| Carlinville | City | Macoupin | 6,048 | 6,034 | 5,912 | o |
| Carlock | Village | McLean | 456 | 436 | 503 | o |
| Carlyle | City | Clinton | 3,411 | 3,370 | 3,334 | o |
| Carmi | City | White | 5,422 | 5,300 | 5,191 | o |
| Carol Stream | Village | DuPage | 40,490 | 39,738 | 40,041 | o |
| Carpentersville | Village | Kane | 30,749 | 36,699 | 38,020 | o |
| Carrier Mills | Village | Saline | 1,888 | 1,837 | 1,821 | o |
| Carrollton | City | Greene | 2,605 | 2,459 | 2,436 | o |
| Carterville | City | Williamson | 4,707 | 5,113 | 5,518 | o |
| Carthage | City | Hancock | 2,724 | 2,530 | 2,455 | o |
| Cary | Village | McHenry | 15,613 | 18,928 | 19,651 | o |
| Casey | City | 2,942 | 2,920 | 2,866 | o | |
| Caseyville | Village | St. Clair | 4,337 | 4,293 | 4,217 | o |
| Catlin | Village | Vermilion | 2,104 | 2,047 | 2,086 | o |
| Cave-In-Rock | Village | Hardin | 346 | 324 | 306 | o |
| Cedar Point | Village | La Salle | 262 | 260 | 260 | o |
| Cedarville | Village | Stephenson | 719 | 694 | 684 | o |
| Central City | Village | Marion | 1,371 | 1,334 | 1,306 | o |
| Centralia | City | 14,409 | 13,573 | 13,465 | o | |
| Centreville | City | St. Clair | 5,951 | 5,797 | 5,643 | o |
| Cerro Gordo | Village | Piatt | 1,440 | 1,374 | 1,344 | o |
| Chadwick | Village | Carroll | 505 | 483 | 467 | o |
| Champaign | City | Champaign | 70,395 | 74,870 | 80,286 | o |
| Chandlerville | Village | Cass | 704 | 701 | 692 | o |
| Channahon | Village | 7,729 | 12,009 | 14,048 | o | |
| Chapin | Village | Morgan | 592 | 581 | 563 | o |
| Charleston | City | Coles | 21,191 | 21,111 | 21,710 | o |
| Chatham | Village | Sangamon | 8,638 | 9,847 | 10,824 | o |
| Chatsworth | Town | Livingston | 1,280 | 1,216 | 1,180 | o |
| Chebanse | Village | 1,151 | 1,098 | 1,088 | o | |
| Chenoa | City | McLean | 1,845 | 1,813 | 1,851 | o |
| Cherry | Village | Bureau | 509 | 491 | 483 | o |
| Cherry Valley | Village | Winnebago | 2,229 | 2,241 | 2,290 | o |
| Chester | City | Randolph | 8,416 | 7,935 | 7,814 | o |
| Chesterfield | Village | Macoupin | 223 | 219 | 213 | o |
| Chicago | City | 2,896,017 | 2,824,584 | 2,851,268 | o | |
| Chicago Heights | City | Cook | 32,805 | 31,097 | 30,412 | o |
| Chicago Ridge | Village | Cook | 14,127 | 13,537 | 13,310 | o |
| Chillicothe | City | Peoria | 6,001 | 5,778 | 6,004 | o |
| Chrisman | City | Edgar | 1,318 | 1,250 | 1,219 | o |
| Christopher | City | Franklin | 2,848 | 2,808 | 2,798 | o |
| Cicero | Town | Cook | 85,616 | 82,018 | 80,100 | o |
| Cisco | Village | Piatt | 284 | 279 | 272 | o |
| Cisne | Village | Wayne | 673 | 655 | 639 | o |
| Cissna Park | Village | Iroquois | 811 | 765 | 768 | o |
| Claremont | Village | Richland | 212 | 208 | 203 | o |
| Clarendon Hills | Village | DuPage | 7,797 | 8,422 | 8,595 | o |
| Clay City | Village | Clay | 994 | 952 | 923 | o |
| Clayton | Village | Adams | 904 | 795 | 830 | o |
| Clear Lake | Village | Sangamon | 267 | 256 | 249 | o |
| Cleveland | Village | Henry | 253 | 242 | 237 | o |
| Clifton | Village | Iroquois | 1,317 | 1,263 | 1,226 | o |
| Clinton | City | De Witt | 7,511 | 7,163 | 6,989 | o |
| Coal City | Village | 4,848 | 5,169 | 5,777 | o | |
| Coal Valley | Village | 3,608 | 3,884 | 4,026 | o | |
| Coalton | Village | Montgomery | 307 | 300 | 293 | o |
| Coatsburg | Village | Adams | 226 | 224 | 223 | o |
| Cobden | Village | Union | 1,116 | 1,095 | 1,085 | o |
| Coffeen | City | Montgomery | 707 | 695 | 680 | o |
| Colchester | City | McDonough | 1,500 | 1,408 | 1,353 | o |
| Coleta | Village | Whiteside | 155 | 153 | 151 | o |
| Colfax | Village | McLean | 989 | 996 | 1,012 | o |
| Collinsville | City | 24,929 | 25,622 | 26,016 | o | |
| Colona | City | Henry | 5,213 | 5,165 | 5,206 | o |
| Colp | Village | Williamson | 224 | 230 | 231 | o |
| Columbia | City | 7,960 | 8,907 | 9,460 | o | |
| Columbus | Village | Adams | 112 | 111 | 111 | o |
| Compton | Village | Lee | 347 | 339 | 331 | o |
| Concord | Village | Morgan | 176 | 173 | 167 | o |
| Congerville | Village | Woodford | 466 | 488 | 502 | o |
| Cooksville | Village | McLean | 213 | 204 | 207 | o |
| Cordova | Village | Rock Island | 651 | 682 | 690 | o |
| Cornell | Village | Livingston | 521 | 507 | 501 | o |
| Cortland | Town | DeKalb | 2,123 | 3,208 | 4,243 | o |
| Coulterville | Village | Randolph | 1,230 | 1,184 | 1,150 | o |
| Country Club Hills | City | Cook | 16,169 | 16,367 | 16,605 | o |
| Countryside | City | Cook | 6,068 | 5,837 | 5,785 | o |
| Cowden | Village | Shelby | 612 | 586 | 568 | o |
| Crainville | Village | Williamson | 1,090 | 1,165 | 1,362 | o |
| Creal Springs | City | Williamson | 702 | 717 | 721 | o |
| Crescent City | Village | Iroquois | 631 | 595 | 577 | o |
| Crest Hill | City | Will | 13,509 | 19,036 | 20,552 | o |
| Creston | Village | Ogle | 543 | 574 | 630 | o |
| Crestwood | Village | Cook | 11,251 | 11,101 | 10,987 | o |
| Crete | Village | Will | 7,786 | 8,640 | 9,111 | o |
| Creve Coeur | Village | Tazewell | 5,448 | 5,226 | 5,221 | o |
| Crossville | Village | White | 782 | 732 | 712 | o |
| Crystal Lake | City | McHenry | 38,195 | 40,591 | 42,180 | o |
| Cuba | City | Fulton | 1,418 | 1,361 | 1,330 | o |
| Cullom | Village | Livingston | 556 | 532 | 521 | o |
| Curran | Village | 249 | 246 | 239 | o | |
| Cutler | Village | Perry | 543 | 536 | 530 | o |
| Cypress | Village | Johnson | 271 | 279 | 280 | o |
| Dahlgren | Village | Hamilton | 514 | 497 | 486 | o |
| Dakota | Village | Stephenson | 499 | 482 | 471 | o |
| Dallas City | City | 1,055 | 1,002 | 957 | o | |
| Dalton City | Village | Moultrie | 581 | 557 | 546 | o |
| Dalzell | Village | 717 | 718 | 714 | o | |
| Damiansville | Village | Clinton | 372 | 375 | 404 | o |
| Dana | Village | La Salle | 173 | 173 | 170 | o |
| Danforth | Village | Iroquois | 587 | 561 | 555 | o |
| Danvers | Village | McLean | 1,183 | 1,137 | 1,163 | o |
| Danville | City | Vermilion | 34,466 | 33,175 | 32,467 | o |
| Darien | City | DuPage | 22,937 | 22,549 | 22,389 | o |
| Davis | Village | Stephenson | 662 | 637 | 628 | o |
| Davis Junction | Village | Ogle | 940 | 1,601 | 2,280 | o |
| Dawson | Village | Sangamon | 512 | 495 | 506 | o |
| De Land | Village | Piatt | 475 | 468 | 460 | o |
| De Pue | Village | Bureau | 1,842 | 1,761 | 1,735 | o |
| De Soto | Village | Jackson | 1,653 | 1,613 | 1,543 | o |
| De Witt | Village | De Witt | 188 | 181 | 175 | o |
| Decatur | City | Macon | 82,121 | 77,565 | 76,199 | o |
| Deer Creek | Village | 608 | 697 | 742 | o | |
| Deer Grove | Village | Whiteside | 48 | 48 | 47 | o |
| Deer Park | Village | 3,132 | 3,192 | 3,352 | o | |
| Deerfield | Village | 18,422 | 19,118 | 19,636 | o | |
| DeKalb | City | DeKalb | 39,029 | 43,411 | 45,734 | o |
| Delavan | City | Tazewell | 1,825 | 1,765 | 1,762 | o |
| Des Plaines | City | Cook | 57,132 | 56,206 | 56,810 | o |
| Detroit | Village | Pike | 93 | 89 | 85 | o |
| Diamond | Village | 1,393 | 2,090 | 2,419 | o | |
| Dieterich | Village | Effingham | 602 | 605 | 596 | o |
| Divernon | Village | Sangamon | 1,203 | 1,151 | 1,131 | o |
| Dix | Village | Jefferson | 494 | 498 | 495 | o |
| Dixmoor | Village | Cook | 3,934 | 3,820 | 3,833 | o |
| Dixon | City | Lee | 16,030 | 14,836 | 14,953 | o |
| Dolton | Village | Cook | 25,612 | 24,275 | 23,758 | o |
| Dongola | Village | Union | 806 | 797 | 780 | o |
| Donnellson | Village | 262 | 261 | 255 | o | |
| Donovan | Village | Iroquois | 351 | 329 | 320 | o |
| Dorchester | Village | Macoupin | 142 | 135 | 164 | o |
| Dover | Village | Bureau | 172 | 166 | 164 | o |
| Dowell | Village | Jackson | 443 | 441 | 419 | o |
| Downers Grove | Village | DuPage | 49,644 | 48,957 | 49,143 | o |
| Downs | Village | McLean | 778 | 750 | 769 | o |
| Du Bois | Village | Washington | 222 | 211 | 205 | o |
| Du Quoin | City | Perry | 6,470 | 6,382 | 6,303 | o |
| Dunfermline | Village | Fulton | 262 | 288 | 299 | o |
| Dunlap | Village | Peoria | 966 | 940 | 941 | o |
| Dupo | Village | St. Clair | 3,930 | 3,930 | 4,084 | o |
| Durand | Village | Winnebago | 1,077 | 1,070 | 1,081 | o |
| Dwight | Village | 4,375 | 4,298 | 4,278 | o | |
| Eagarville | Village | Macoupin | 128 | 126 | 123 | o |
| Earlville | City | La Salle | 1,803 | 1,836 | 1,850 | o |
| East Alton | Village | Madison | 6,830 | 6,628 | 6,545 | o |
| East Brooklyn | Village | Grundy | 123 | 121 | 127 | o |
| East Cape Girardeau | Village | Alexander | 437 | 394 | 361 | o |
| East Carondelet | Village | St. Clair | 315 | 577 | 579 | o |
| East Dubuque | City | Jo Daviess | 2,004 | 1,948 | 1,899 | o |
| East Dundee | Village | 2,957 | 3,096 | 3,149 | o | |
| East Galesburg | Village | Knox | 839 | 788 | 771 | o |
| East Gillespie | Village | Macoupin | 234 | 224 | 240 | o |
| East Hazel Crest | Village | Cook | 1,607 | 1,555 | 1,527 | o |
| East Moline | City | Rock Island | 21,513 | 21,060 | 20,867 | o |
| East Peoria | City | Tazewell | 22,698 | 22,408 | 22,860 | o |
| East St. Louis | City | St. Clair | 31,622 | 29,580 | 28,753 | o |
| Easton | Village | Mason | 373 | 363 | 345 | o |
| Eddyville | Village | Pope | 153 | 142 | 138 | o |
| Edgewood | Village | Effingham | 527 | 531 | 523 | o |
| Edinburg | Village | Christian | 1,138 | 1,132 | 1,101 | o |
| Edwardsville | City | Madison | 22,299 | 24,024 | 24,475 | o |
| Effingham | City | Effingham | 12,400 | 12,356 | 12,557 | o |
| El Dara | Village | Pike | 89 | 85 | 81 | o |
| El Paso | City | 2,738 | 2,766 | 2,870 | o | |
| Elburn | Village | Kane | 2,774 | 4,312 | 5,278 | o |
| Eldorado | City | Saline | 4,539 | 4,407 | 4,365 | o |
| Eldred | Village | Greene | 211 | 204 | 195 | o |
| Elgin | City | 94,814 | 97,382 | 107,519 | o | |
| Elizabeth | Village | Jo Daviess | 684 | 664 | 644 | o |
| Elizabethtown | Village | Hardin | 348 | 326 | 307 | o |
| Elk Grove Village | Village | 34,725 | 33,694 | 33,124 | o | |
| Elkhart | Village | Logan | 443 | 426 | 421 | o |
| Elkville | Village | Jackson | 985 | 955 | 912 | o |
| Elliott | Village | Ford | 341 | 338 | 331 | o |
| Ellis Grove | Village | Randolph | 381 | 370 | 360 | o |
| Ellisville | Village | Fulton | 87 | 84 | 82 | o |
| Ellsworth | Village | McLean | 271 | 259 | 262 | o |
| Elmhurst | City | 42,999 | 45,045 | 46,314 | o | |
| Elmwood | City | Peoria | 1,944 | 1,889 | 1,887 | o |
| Elmwood Park | Village | Cook | 25,405 | 24,278 | 23,926 | o |
| Elsah | Village | Jersey | 635 | 637 | 629 | o |
| Elvaston | Village | Hancock | 152 | 144 | 138 | o |
| Elwood | Village | Will | 1,622 | 2,184 | 2,357 | o |
| Emden | Village | Logan | 518 | 491 | 482 | o |
| Emington | Village | Livingston | 120 | 114 | 110 | o |
| Energy | Village | Williamson | 1,175 | 1,171 | 1,206 | o |
| Enfield | Village | White | 625 | 613 | 601 | o |
| Equality | Village | Gallatin | 721 | 678 | 636 | o |
| Erie | Village | Whiteside | 1,589 | 1,555 | 1,543 | o |
| Essex | Village | Kankakee | 544 | 667 | 696 | o |
| Eureka | City | Woodford | 5,035 | 5,115 | 5,436 | o |
| Evanston | City | Cook | 74,250 | 75,489 | 77,857 | o |
| Evansville | Village | Randolph | 730 | 699 | 680 | o |
| Evergreen Park | Village | Cook | 20,821 | 19,693 | 19,237 | o |
| Ewing | Village | Franklin | 310 | 321 | 319 | o |
| Exeter | Village | Scott | 70 | 67 | 66 | o |
| Fairbury | City | Livingston | 3,980 | 3,878 | 3,792 | o |
| Fairfield | City | Wayne | 5,410 | 5,156 | 5,080 | o |
| Fairmont City | Village | 2,439 | 2,316 | 2,257 | o | |
| Fairmount | Village | Vermilion | 640 | 638 | 625 | o |
| Fairview | Village | Fulton | 493 | 472 | 478 | o |
| Fairview Heights | City | St. Clair | 14,995 | 16,283 | 16,706 | o |
| Farina | Village | 558 | 554 | 550 | o | |
| Farmer City | City | De Witt | 2,055 | 1,986 | 1,917 | o |
| Farmersville | Village | Montgomery | 768 | 754 | 739 | o |
| Farmington | City | Fulton | 2,603 | 2,477 | 2,427 | o |
| Fayetteville | Village | St. Clair | 384 | 383 | 372 | o |
| Ferris | Village | Hancock | 168 | 158 | 152 | o |
| Fidelity | Village | Jersey | 105 | 105 | 103 | o |
| Fieldon | Village | Jersey | 271 | 269 | 266 | o |
| Fillmore | Village | Montgomery | 362 | 355 | 347 | o |
| Findlay | Village | Shelby | 723 | 675 | 664 | o |
| Fisher | Village | Champaign | 1,651 | 1,667 | 1,764 | o |
| Fithian | Village | Vermilion | 506 | 547 | 540 | o |
| Flanagan | Village | Livingston | 1,083 | 1,044 | 1,028 | o |
| Flat Rock | Village | Crawford | 415 | 406 | 398 | o |
| Flora | City | Clay | 5,065 | 4,805 | 4,680 | o |
| Florence | Village | Pike | 71 | 68 | 65 | o |
| Flossmoor | Village | Cook | 9,333 | 9,314 | 9,258 | o |
| Foosland | Village | Champaign | 90 | 89 | 86 | o |
| Ford Heights | Village | Cook | 3,448 | 3,255 | 3,176 | o |
| Forest City | Village | Mason | 287 | 275 | 262 | o |
| Forest Park | Village | Cook | 15,688 | 15,068 | 15,136 | o |
| Forest View | Village | Cook | 778 | 732 | 713 | o |
| Forrest | Village | Livingston | 1,225 | 1,183 | 1,165 | o |
| Forreston | Village | Ogle | 1,474 | 1,502 | 1,505 | o |
| Forsyth | Village | Macon | 2,442 | 2,740 | 3,007 | o |
| Fox Lake | Village | 9,189 | 10,530 | 11,042 | o | |
| Fox River Grove | Village | 4,971 | 5,144 | 5,202 | o | |
| Frankfort | Village | 10,482 | 15,451 | 18,301 | o | |
| Franklin | Village | Morgan | 619 | 608 | 591 | o |
| Franklin Grove | Village | Lee | 1,065 | 1,020 | 1,004 | o |
| Franklin Park | Village | Cook | 19,504 | 18,384 | 17,898 | o |
| Freeburg | Village | St. Clair | 4,084 | 4,282 | 4,545 | o |
| Freeman Spur | Village | 273 | 281 | 280 | o | |
| Freeport | City | Stephenson | 26,460 | 25,257 | 24,699 | o |
| Fulton | City | Whiteside | 3,888 | 3,818 | 3,821 | o |
| Fults | Village | Monroe | 28 | 29 | 29 | o |
| Galatia | Village | Saline | 1,013 | 983 | 975 | o |
| Galena | City | Jo Daviess | 3,473 | 3,359 | 3,302 | o |
| Galesburg | City | Knox | 33,786 | 31,754 | 31,006 | o |
| Galva | City | Henry | 2,798 | 2,697 | 2,631 | o |
| Garden Prairie | Village | Boone | 337 | 359 | 367 | o |
| Gardner | Village | Grundy | 1,435 | 1,453 | 1,528 | o |
| Garrett | Village | Douglas | 198 | 197 | 187 | o |
| Gays | Village | Moultrie | 265 | 264 | 258 | o |
| Geneseo | City | Henry | 6,496 | 6,403 | 6,399 | o |
| Geneva | City | Kane | 19,613 | 23,102 | 24,391 | o |
| Genoa | City | DeKalb | 4,209 | 4,781 | 5,145 | o |
| Georgetown | City | Vermilion | 3,628 | 3,486 | 3,412 | o |
| German Valley | Village | Stephenson | 479 | 457 | 449 | o |
| Germantown | Village | Clinton | 1,196 | 1,173 | 1,143 | o |
| Germantown Hills | Village | Woodford | 2,266 | 2,945 | 3,232 | o |
| Gibson City | City | Ford | 3,389 | 3,240 | 3,266 | o |
| Gifford | Village | Champaign | 835 | 999 | 993 | o |
| Gilberts | Village | Kane | 1,289 | 4,756 | 6,154 | o |
| Gillespie | City | Macoupin | 3,407 | 3,224 | 3,145 | o |
| Gilman | City | Iroquois | 1,793 | 1,731 | 1,677 | o |
| Girard | City | Macoupin | 2,245 | 2,207 | 2,152 | o |
| Gladstone | Village | Henderson | 284 | 268 | 250 | o |
| Glasford | Village | Peoria | 1,076 | 1,037 | 1,043 | o |
| Glasgow | Village | Scott | 170 | 166 | 161 | o |
| Glen Carbon | Village | Madison | 10,570 | 11,930 | 12,668 | o |
| Glen Ellyn | Village | DuPage | 27,207 | 27,055 | 27,236 | o |
| Glencoe | Village | Cook | 8,722 | 8,860 | 8,990 | o |
| Glendale Heights | Village | DuPage | 31,865 | 32,222 | 31,877 | o |
| Glenview | Village | Cook | 43,073 | 45,542 | 46,207 | o |
| Glenwood | Village | Cook | 9,032 | 8,625 | 8,453 | o |
| Godfrey | Village | Madison | 16,787 | 17,231 | 17,619 | o |
| Godley | Village | 594 | 696 | 716 | o | |
| Golconda | City | Pope | 724 | 658 | 638 | o |
| Golden | Village | Adams | 629 | 620 | 616 | o |
| Golden Gate | Village | Wayne | 100 | 98 | 96 | o |
| Golf | Village | Cook | 451 | 455 | 442 | o |
| Good Hope | Village | McDonough | 416 | 389 | 374 | o |
| Goodfield | Village | 694 | 785 | 858 | o | |
| Goreville | Village | Johnson | 941 | 946 | 968 | o |
| Gorham | Village | Jackson | 256 | 254 | 243 | o |
| Grafton | City | Jersey | 558 | 635 | 672 | o |
| Grand Ridge | Village | La Salle | 546 | 520 | 518 | o |
| Grand Tower | City | Jackson | 624 | 601 | 575 | o |
| Grandview | Village | Sangamon | 1,537 | 1,448 | 1,408 | o |
| Granite City | City | Madison | 31,980 | 30,948 | 30,695 | o |
| Grant Park | Village | Kankakee | 1,392 | 1,588 | 1,701 | o |
| Grantfork | Village | Madison | 258 | 278 | 340 | o |
| Granville | Village | Putnam | 1,414 | 1,359 | 1,341 | o |
| Grayslake | Village | Lake | 18,532 | 21,093 | 21,698 | o |
| Grayville | City | 1,747 | 1,625 | 1,585 | o | |
| Green Oaks | Village | Lake | 3,581 | 3,841 | 3,907 | o |
| Green Valley | Village | Tazewell | 728 | 697 | 696 | o |
| Greenfield | City | Greene | 1,179 | 1,116 | 1,067 | o |
| Greenup | Village | Cumberland | 1,542 | 1,484 | 1,466 | o |
| Greenview | Village | Menard | 862 | 802 | 788 | o |
| Greenville | City | Bond | 7,017 | 7,203 | 7,284 | o |
| Greenwood | Village | McHenry | 248 | 254 | 257 | o |
| Gridley | Village | McLean | 1,417 | 1,404 | 1,444 | o |
| Griggsville | City | Pike | 1,261 | 1,198 | 1,157 | o |
| Gulf Port | Village | Henderson | 207 | 218 | 213 | o |
| Gurnee | Village | Lake | 28,816 | 30,002 | 30,571 | o |
| Hainesville | Village | Lake | 2,074 | 3,679 | 3,682 | o |
| Hamburg | Village | Calhoun | 126 | 123 | 119 | o |
| Hamel | Village | Madison | 570 | 758 | 767 | o |
| Hamilton | City | Hancock | 3,029 | 2,820 | 2,728 | o |
| Hammond | Village | Piatt | 518 | 517 | 508 | o |
| Hampshire | Village | Kane | 2,941 | 4,075 | 5,686 | o |
| Hampton | Village | Rock Island | 1,630 | 1,730 | 1,779 | o |
| Hanaford | Village | Franklin | 214 | 223 | 222 | o |
| Hanna City | Village | Peoria | 1,010 | 983 | 982 | o |
| Hanover | Village | Jo Daviess | 857 | 805 | 783 | o |
| Hanover Park | Village | 38,306 | 36,931 | 36,703 | o | |
| Hardin | Village | Calhoun | 959 | 944 | 917 | o |
| Harmon | Village | Lee | 149 | 145 | 142 | o |
| Harrisburg | City | Saline | 9,898 | 9,612 | 9,528 | o |
| Harristown | Village | Macon | 1,345 | 1,255 | 1,236 | o |
| Hartford | Village | Madison | 1,545 | 1,497 | 1,473 | o |
| Hartsburg | Village | Logan | 358 | 340 | 330 | o |
| Harvard | City | McHenry | 8,090 | 9,079 | 9,965 | o |
| Harvel | Village | 235 | 229 | 225 | o | |
| Harvey | City | Cook | 30,000 | 28,533 | 27,946 | o |
| Harwood Heights | Village | Cook | 8,297 | 8,110 | 8,009 | o |
| Havana | City | Mason | 3,577 | 3,412 | 3,260 | o |
| Hawthorn Woods | Village | Lake | 6,102 | 7,089 | 8,068 | o |
| Hazel Crest | Village | Cook | 14,816 | 14,281 | 13,996 | o |
| Hebron | Village | McHenry | 1,133 | 1,224 | 1,426 | o |
| Hecker | Village | 475 | 484 | 491 | o | |
| Henderson | Village | Knox | 319 | 301 | 293 | o |
| Hennepin | Village | Putnam | 707 | 691 | 706 | o |
| Henning | Village | Vermilion | 241 | 233 | 228 | o |
| Henry | City | Marshall | 2,540 | 2,474 | 2,421 | o |
| Herrick | Village | Shelby | 524 | 517 | 502 | o |
| Herrin | City | Williamson | 11,484 | 11,777 | 12,450 | o |
| Herscher | Village | Kankakee | 1,524 | 1,553 | 1,619 | o |
| Hettick | Village | Macoupin | 182 | 179 | 174 | o |
| Heyworth | Village | McLean | 2,458 | 2,510 | 2,654 | o |
| Hickory Hills | City | Cook | 13,926 | 13,413 | 13,252 | o |
| Hidalgo | Village | Jasper | 123 | 120 | 117 | o |
| Highland | City | Madison | 8,500 | 9,221 | 9,807 | o |
| Highland Park | City | Lake | 30,257 | 30,817 | 31,516 | o |
| Highwood | City | Lake | 5,470 | 5,374 | 5,382 | o |
| Hillcrest | Village | Ogle | 1,158 | 1,275 | 1,287 | o |
| Hillsboro | City | Montgomery | 6,373 | 6,198 | 6,106 | o |
| Hillsdale | Village | Rock Island | 588 | 572 | 563 | o |
| Hillside | Village | Cook | 8,155 | 7,700 | 8,265 | o |
| Hillview | Village | Greene | 179 | 173 | 165 | o |
| Hinckley | Village | DeKalb | 1,989 | 2,074 | 2,091 | o |
| Hindsboro | Village | Douglas | 361 | 343 | 326 | o |
| Hinsdale | Village | 17,452 | 17,900 | 18,454 | o | |
| Hodgkins | Village | Cook | 2,134 | 2,078 | 2,040 | o |
| Hoffman | Village | Clinton | 463 | 450 | 439 | o |
| Hoffman Estates | Village | 49,676 | 52,038 | 53,655 | o | |
| Holiday Hills | Village | McHenry | 727 | 706 | 716 | o |
| Hollowayville | Village | Bureau | 91 | 88 | 86 | o |
| Homer | Village | Champaign | 1,200 | 1,166 | 1,130 | o |
| Homer Glen | Village | 22,210 | 24,737 | 26,150 | o | |
| Hometown | City | Cook | 4,467 | 4,200 | 4,083 | o |
| Homewood | Village | Cook | 19,543 | 18,744 | 18,367 | o |
| Hoopeston | City | Vermilion | 5,995 | 5,734 | 5,602 | o |
| Hooppole | Village | Henry | 162 | 153 | 151 | o |
| Hopedale | Village | Tazewell | 926 | 904 | 932 | o |
| Hopewell | Village | Marshall | 396 | 430 | 447 | o |
| Hopkins Park | Village | Kankakee | 755 | 841 | 847 | o |
| Hoyleton | Village | Washington | 520 | 497 | 485 | o |
| Hudson | Village | McLean | 1,512 | 1,670 | 1,810 | o |
| Huey | Village | Clinton | 196 | 187 | 183 | o |
| Hull | Village | Pike | 474 | 447 | 430 | o |
| Humboldt | Village | Coles | 479 | 474 | 463 | o |
| Hume | Village | Edgar | 380 | 369 | 358 | o |
| Huntley | Village | 5,765 | 17,640 | 23,177 | o | |
| Hurst | City | Williamson | 805 | 789 | 792 | o |
| Hutsonville | Village | Crawford | 633 | 603 | 602 | o |
| Illiopolis | Village | Sangamon | 916 | 869 | 849 | o |
| Ina | Village | Jefferson | 2,460 | 2,455 | 2,451 | o |
| Indian Creek | Village | Lake | 194 | 526 | 597 | o |
| Indian Head Park | Village | Cook | 3,685 | 3,622 | 3,594 | o |
| Indianola | Village | Vermilion | 224 | 224 | 219 | o |
| Industry | Village | McDonough | 545 | 510 | 490 | o |
| Inverness | Village | Cook | 6,987 | 7,268 | 7,649 | o |
| Iola | Village | Clay | 171 | 167 | 162 | o |
| Ipava | Village | Fulton | 508 | 480 | 471 | o |
| Iroquois | Village | Iroquois | 207 | 197 | 196 | o |
| Irving | Village | Montgomery | 495 | 486 | 475 | o |
| Irvington | Village | Washington | 736 | 695 | 691 | o |
| Irwin | Village | Kankakee | 71 | 68 | 69 | o |
| Island Lake | Village | 8,164 | 8,322 | 8,617 | o | |
| Itasca | Village | DuPage | 8,345 | 8,398 | 8,636 | o |
| Iuka | Village | Marion | 598 | 579 | 566 | o |
| Ivesdale | Village | 288 | 283 | 274 | o | |
| Jacksonville | City | Morgan | 20,004 | 19,516 | 19,214 | o |
| Jeffersonville | Village | Wayne | 366 | 359 | 351 | o |
| Jeisyville | Village | Christian | 128 | 124 | 120 | o |
| Jerome | Village | Sangamon | 1,414 | 1,330 | 1,291 | o |
| Jerseyville | City | Jersey | 8,025 | 8,073 | 8,339 | o |
| Jewett | Village | Cumberland | 232 | 225 | 222 | o |
| Johnsburg | Village | McHenry | 5,416 | 6,227 | 6,806 | o |
| Johnsonville | Village | Wayne | 69 | 67 | 65 | o |
| Johnston City | City | Williamson | 3,558 | 3,461 | 3,491 | o |
| Joliet | City | 107,165 | 133,022 | 147,648 | o | |
| Jonesboro | City | Union | 1,841 | 1,819 | 1,783 | o |
| Joppa | Village | Massac | 409 | 415 | 402 | o |
| Joy | Village | Mercer | 373 | 355 | 344 | o |
| Junction | Village | Gallatin | 139 | 132 | 123 | o |
| Junction City | Village | Marion | 559 | 548 | 536 | o |
| Justice | Village | Cook | 12,200 | 12,577 | 12,390 | o |
| Kampsville | Village | Calhoun | 302 | 297 | 288 | o |
| Kane | Village | Greene | 459 | 446 | 426 | o |
| Kaneville | Village | Kane | 446 | 591 | 611 | o |
| Kangley | Village | La Salle | 287 | 275 | 271 | o |
| Kankakee | City | Kankakee | 27,703 | 26,667 | 26,840 | o |
| Kansas | Village | Edgar | 842 | 818 | 794 | o |
| Kappa | Village | Woodford | 172 | 187 | 221 | o |
| Karnak | Village | Pulaski | 619 | 568 | 526 | o |
| Kaskaskia | Village | Randolph | 9 | 9 | 9 | o |
| Keenes | Village | Wayne | 99 | 97 | 95 | o |
| Keensburg | Village | Wabash | 254 | 250 | 240 | o |
| Keithsburg | City | Mercer | 714 | 701 | 684 | o |
| Kell | Village | Marion | 231 | 223 | 218 | o |
| Kempton | Village | Ford | 235 | 232 | 227 | o |
| Kenilworth | Village | Cook | 2,494 | 2,426 | 2,389 | o |
| Kenney | Village | De Witt | 374 | 361 | 348 | o |
| Kewanee | City | Henry | 12,982 | 12,474 | 12,241 | o |
| Keyesport | Village | 486 | 478 | 466 | o | |
| Kilbourne | Village | Mason | 375 | 360 | 344 | o |
| Kildeer | Village | Lake | 3,517 | 3,986 | 4,114 | o |
| Kincaid | Village | Christian | 1,442 | 1,456 | 1,445 | o |
| Kinderhook | Village | Pike | 249 | 237 | 227 | o |
| Kingston | Village | DeKalb | 979 | 1,063 | 1,069 | o |
| Kingston Mines | Village | Peoria | 259 | 251 | 255 | o |
| Kinmundy | City | Marion | 892 | 862 | 843 | o |
| Kinsman | Village | Grundy | 109 | 107 | 110 | o |
| Kirkland | Village | DeKalb | 1,170 | 1,632 | 1,709 | o |
| Kirkwood | Village | Warren | 794 | 722 | 701 | o |
| Knoxville | City | Knox | 3,178 | 2,966 | 2,914 | o |
| La Fayette | Village | Stark | 227 | 218 | 215 | o |
| La Grange | Village | Cook | 15,608 | 15,346 | 15,186 | o |
| La Grange Park | Village | Cook | 13,295 | 12,611 | 12,338 | o |
| La Harpe | City | Hancock | 1,385 | 1,317 | 1,267 | o |
| La Moille | Village | Bureau | 773 | 747 | 736 | o |
| La Prairie | Village | Adams | 60 | 59 | 58 | o |
| La Rose | Village | Marshall | 159 | 148 | 143 | o |
| Lacon | City | Marshall | 1,979 | 1,883 | 1,830 | o |
| Ladd | Village | Bureau | 1,311 | 1,280 | 1,261 | o |
| Lake Barrington | Village | Lake | 4,756 | 4,932 | 4,973 | o |
| Lake Bluff | Village | Lake | 6,056 | 6,138 | 6,223 | o |
| Lake Forest | City | Lake | 20,081 | 20,510 | 20,991 | o |
| Lake in the Hills | Village | McHenry | 23,619 | 28,778 | 29,704 | o |
| Lake Ka-ho | Village | 251 | 250 | 246 | o | |
| Lake Villa | Village | Lake | 5,926 | 8,347 | 8,706 | o |
| Lake Zurich | Village | Lake | 18,509 | 19,904 | 20,427 | o |
| Lakemoor | Village | 2,841 | 5,085 | 5,776 | o | |
| Lakewood | Village | McHenry | 2,330 | 3,408 | 3,706 | o |
| Lanark | City | Carroll | 1,591 | 1,481 | 1,448 | o |
| Lansing | Village | Cook | 28,343 | 27,064 | 26,524 | o |
| LaSalle | City | La Salle | 9,920 | 9,552 | 9,497 | o |
| Latham | Village | Logan | 371 | 351 | 343 | o |
| Lawrenceville | City | Lawrence | 4,750 | 4,488 | 4,287 | o |
| Le Roy | City | McLean | 3,335 | 3,410 | 3,566 | o |
| Leaf River | Village | Ogle | 555 | 547 | 542 | o |
| Lebanon | City | St. Clair | 3,557 | 3,929 | 4,541 | o |
| Lee | Village | 311 | 312 | 310 | o | |
| Leland | Village | La Salle | 970 | 936 | 960 | o |
| Leland Grove | City | Sangamon | 1,587 | 1,480 | 1,437 | o |
| Lemont | Village | 13,418 | 15,223 | 16,251 | o | |
| Lena | Village | Stephenson | 2,902 | 2,824 | 2,807 | o |
| Lenzburg | Village | St. Clair | 577 | 550 | 535 | o |
| Leonore | Village | La Salle | 110 | 110 | 108 | o |
| Lerna | Village | Coles | 322 | 318 | 311 | o |
| Lewistown | City | Fulton | 2,522 | 2,406 | 2,364 | o |
| Lexington | City | McLean | 1,962 | 1,925 | 1,974 | o |
| Liberty | Village | Adams | 519 | 514 | 511 | o |
| Libertyville | Village | Lake | 20,776 | 21,373 | 21,834 | o |
| Lily Lake | Village | Kane | 834 | 908 | 929 | o |
| Lima | Village | Adams | 169 | 168 | 167 | o |
| Limestone | Village | Kankakee | 1,624 | 1,638 | 1,646 | o |
| Lincoln | City | Logan | 15,383 | 14,712 | 14,523 | o |
| Lincolnshire | Village | Lake | 6,133 | 6,713 | 7,956 | o |
| Lincolnwood | Village | Cook | 12,359 | 11,910 | 11,742 | o |
| Lindenhurst | Village | Lake | 12,620 | 14,139 | 14,694 | o |
| Lisbon | Village | Kendall | 292 | 307 | 371 | o |
| Lisle | Village | DuPage | 22,539 | 23,206 | 23,163 | o |
| Litchfield | City | Montgomery | 6,986 | 6,736 | 6,588 | o |
| Little York | Village | Warren | 269 | 253 | 245 | o |
| Littleton | Village | Schuyler | 197 | 193 | 184 | o |
| Liverpool | Village | Fulton | 119 | 116 | 113 | o |
| Livingston | Village | Madison | 825 | 802 | 789 | o |
| Loami | Village | Sangamon | 804 | 785 | 787 | o |
| Lockport | City | Will | 15,399 | 21,847 | 25,055 | o |
| Loda | Village | Iroquois | 419 | 410 | 397 | o |
| Lomax | Village | Henderson | 477 | 438 | 415 | o |
| Lombard | Village | DuPage | 42,594 | 42,501 | 42,825 | o |
| London Mills | Village | 447 | 433 | 422 | o | |
| Long Creek | Village | Macon | 1,404 | 1,345 | 1,342 | o |
| Long Grove | Village | Lake | 6,740 | 7,689 | 8,104 | o |
| Long Point | Village | Livingston | 247 | 239 | 232 | o |
| Longview | Village | Champaign | 153 | 150 | 145 | o |
| Loraine | Village | Adams | 363 | 359 | 356 | o |
| Lostant | Village | La Salle | 486 | 478 | 471 | o |
| Louisville | Village | Clay | 1,280 | 1,251 | 1,217 | o |
| Loves Park | City | 20,213 | 22,856 | 24,464 | o | |
| Lovington | Village | Moultrie | 1,222 | 1,182 | 1,167 | o |
| Ludlow | Village | Champaign | 373 | 376 | 365 | o |
| Lyndon | Village | Whiteside | 566 | 541 | 546 | o |
| Lynnville | Village | Morgan | 137 | 137 | 133 | o |
| Lynwood | Village | Cook | 7,974 | 8,145 | 8,650 | o |
| Lyons | Village | Cook | 10,255 | 10,368 | 10,187 | o |
| Macedonia | Village | 51 | 50 | 49 | o | |
| Machesney Park | Village | Winnebago | 20,768 | 21,705 | 22,724 | o |
| Mackinaw | Village | Tazewell | 1,576 | 1,626 | 1,750 | o |
| Macomb | City | McDonough | 18,462 | 19,385 | 19,748 | o |
| Macon | City | Macon | 1,213 | 1,143 | 1,128 | o |
| Madison | City | 4,545 | 4,571 | 4,545 | o | |
| Maeystown | Village | Monroe | 146 | 153 | 152 | o |
| Magnolia | Village | Putnam | 279 | 275 | 271 | o |
| Mahomet | Village | Champaign | 4,996 | 5,799 | 6,664 | o |
| Makanda | Village | Jackson | 421 | 426 | 407 | o |
| Malden | Village | Bureau | 343 | 334 | 330 | o |
| Malta | Village | DeKalb | 974 | 983 | 1,194 | o |
| Manchester | Village | Scott | 352 | 340 | 331 | o |
| Manhattan | Village | Will | 3,378 | 5,054 | 7,345 | o |
| Manito | Village | Mason | 1,735 | 1,669 | 1,595 | o |
| Manlius | Village | Bureau | 355 | 342 | 336 | o |
| Mansfield | Village | Piatt | 949 | 930 | 911 | o |
| Manteno | Village | Kankakee | 6,477 | 7,956 | 8,575 | o |
| Maple Park | Village | 771 | 1,120 | 1,298 | o | |
| Mapleton | Village | Peoria | 246 | 238 | 238 | o |
| Maquon | Village | Knox | 318 | 294 | 285 | o |
| Marengo | City | McHenry | 6,405 | 7,361 | 7,614 | o |
| Marietta | Village | Fulton | 150 | 146 | 143 | o |
| Marine | Village | Madison | 918 | 949 | 934 | o |
| Marion | City | Williamson | 16,196 | 17,263 | 17,460 | o |
| Marissa | Village | St. Clair | 2,141 | 2,035 | 1,999 | o |
| Mark | Village | Putnam | 502 | 492 | 525 | o |
| Markham | City | Cook | 12,741 | 12,302 | 12,169 | o |
| Maroa | City | Macon | 1,685 | 1,585 | 1,565 | o |
| Marquette Heights | City | Tazewell | 2,794 | 2,802 | 2,836 | o |
| Marseilles | City | La Salle | 4,661 | 4,841 | 4,970 | o |
| Marshall | City | Clark | 3,920 | 3,809 | 3,884 | o |
| Martinsville | City | Clark | 1,225 | 1,219 | 1,194 | o |
| Martinton | Village | Iroquois | 375 | 379 | 374 | o |
| Maryville | Village | Madison | 4,869 | 6,626 | 7,545 | o |
| Mascoutah | City | St. Clair | 5,771 | 5,893 | 6,797 | o |
| Mason | Town | Effingham | 402 | 404 | 398 | o |
| Mason City | City | Mason | 2,562 | 2,433 | 2,324 | o |
| Matherville | Village | Mercer | 772 | 762 | 739 | o |
| Matteson | Village | 12,952 | 15,518 | 17,313 | o | |
| Mattoon | City | Coles | 18,296 | 17,419 | 17,120 | o |
| Maunie | Village | White | 177 | 175 | 171 | o |
| Maywood | Village | Cook | 26,980 | 25,550 | 24,903 | o |
| Mazon | Village | Grundy | 904 | 910 | 1,015 | o |
| McClure | Village | 427 | 404 | 370 | o | |
| McCook | Village | Cook | 254 | 241 | 236 | o |
| McCullom Lake | Village | McHenry | 1,038 | 1,028 | 1,111 | o |
| McHenry | City | McHenry | 21,716 | 24,642 | 27,165 | o |
| McLean | Village | McLean | 808 | 787 | 799 | o |
| McLeansboro | City | Hamilton | 2,949 | 2,784 | 2,719 | o |
| McNabb | Village | Putnam | 310 | 284 | 281 | o |
| Mechanicsburg | Village | Sangamon | 476 | 464 | 451 | o |
| Media | Village | Henderson | 130 | 119 | 112 | o |
| Medora | Village | Macoupin | 501 | 491 | 478 | o |
| Melrose Park | Village | Cook | 23,188 | 22,351 | 21,767 | o |
| Melvin | Village | Ford | 465 | 460 | 450 | o |
| Mendon | Village | Adams | 1,027 | 1,017 | 1,012 | o |
| Mendota | City | La Salle | 7,292 | 7,058 | 7,008 | o |
| Menominee | Village | Jo Daviess | 217 | 210 | 206 | o |
| Meredosia | Village | Morgan | 1,041 | 989 | 960 | o |
| Merrionette Park | Village | Cook | 1,999 | 2,037 | 1,983 | o |
| Metamora | Village | Woodford | 2,733 | 3,036 | 3,437 | o |
| Metcalf | Village | Edgar | 213 | 208 | 202 | o |
| Metropolis | City | Massac | 6,593 | 6,495 | 6,490 | o |
| Mettawa | Village | Lake | 367 | 438 | 516 | o |
| Middletown | Village | Logan | 434 | 430 | 417 | o |
| Midlothian | Village | Cook | 14,335 | 13,837 | 13,577 | o |
| Milan | Village | Rock Island | 5,376 | 5,192 | 5,195 | o |
| Milford | Village | Iroquois | 1,374 | 1,299 | 1,257 | o |
| Mill Creek | Village | Union | 76 | 76 | 74 | o |
| Mill Shoals | Village | 235 | 231 | 226 | o | |
| Millbrook | Village | 311 | 327 | 375 | o | |
| Milledgeville | Village | Carroll | 1,014 | 938 | 921 | o |
| Millington | Village | 478 | 490 | 529 | o | |
| Millstadt | Village | St. Clair | 2,946 | 3,152 | 3,401 | o |
| Milton | Village | Pike | 274 | 262 | 251 | o |
| Mineral | Village | Bureau | 272 | 263 | 259 | o |
| Minier | Village | Tazewell | 1,244 | 1,248 | 1,255 | o |
| Minonk | City | Woodford | 2,174 | 2,144 | 2,175 | o |
| Minooka | Village | 4,059 | 8,293 | 10,651 | o | |
| Modesto | Village | Macoupin | 252 | 248 | 241 | o |
| Mokena | Village | Will | 14,645 | 17,386 | 19,251 | o |
| Moline | City | Rock Island | 44,047 | 42,706 | 43,050 | o |
| Momence | City | Kankakee | 3,162 | 3,057 | 3,063 | o |
| Monee | Village | Will | 2,967 | 4,633 | 4,993 | o |
| Monmouth | City | Warren | 9,846 | 9,365 | 9,244 | o |
| Monroe Center | Village | 494 | 497 | 498 | o | |
| Montgomery | Village | 5,576 | 11,949 | 15,335 | o | |
| Monticello | City | Piatt | 5,139 | 5,210 | 5,374 | o |
| Montrose | Village | 260 | 263 | 259 | o | |
| Morris | City | Grundy | 11,994 | 12,833 | 13,972 | o |
| Morrison | City | Whiteside | 4,484 | 4,297 | 4,307 | o |
| Morrisonville | Village | Christian | 1,068 | 1,041 | 1,012 | o |
| Morton | Village | Tazewell | 15,442 | 15,826 | 16,209 | o |
| Morton Grove | Village | Cook | 22,445 | 21,984 | 22,412 | o |
| Mound City | City | Pulaski | 692 | 620 | 574 | o |
| Mound Station | Village | Brown | 127 | 120 | 118 | o |
| Mounds | City | Pulaski | 1,117 | 985 | 921 | o |
| Mount Auburn | Village | Christian | 515 | 536 | 537 | o |
| Mount Carmel | City | Wabash | 8,009 | 7,600 | 7,363 | o |
| Mount Carroll | City | Carroll | 1,836 | 1,700 | 1,649 | o |
| Mount Clare | Village | Macoupin | 433 | 426 | 418 | o |
| Mount Erie | Village | Wayne | 105 | 102 | 100 | o |
| Mount Morris | Village | Ogle | 3,043 | 3,053 | 3,093 | o |
| Mount Olive | City | Macoupin | 2,172 | 2,087 | 2,052 | o |
| Mount Prospect | Village | Cook | 56,271 | 53,977 | 53,050 | o |
| Mount Pulaski | City | Logan | 1,701 | 1,617 | 1,577 | o |
| Mount Sterling | City | Brown | 2,071 | 1,949 | 1,912 | o |
| Mount Vernon | City | Jefferson | 16,358 | 16,198 | 16,185 | o |
| Mount Zion | Village | Macon | 4,875 | 5,014 | 5,232 | o |
| Moweaqua | Village | 1,944 | 1,840 | 1,828 | o | |
| Muddy | Village | Saline | 79 | 73 | 72 | o |
| Mulberry Grove | Village | Bond | 672 | 671 | 652 | o |
| Muncie | Village | Vermilion | 155 | 149 | 145 | o |
| Mundelein | Village | Lake | 30,999 | 32,126 | 33,979 | o |
| Murphysboro | City | Jackson | 8,715 | 8,450 | 8,106 | o |
| Murrayville | Village | Morgan | 644 | 632 | 613 | o |
| Naperville | City | 128,517 | 139,460 | 143,661 | o | |
| Naplate | Village | La Salle | 523 | 520 | 511 | o |
| Naples | Town | Scott | 131 | 127 | 124 | o |
| Nashville | City | Washington | 3,147 | 3,056 | 2,993 | o |
| Nason | City | Jefferson | 234 | 237 | 235 | o |
| Nauvoo | City | Hancock | 1,081 | 1,156 | 1,141 | o |
| Nebo | Village | Pike | 408 | 389 | 372 | o |
| Nelson | Village | Lee | 163 | 159 | 155 | o |
| Neoga | City | Cumberland | 1,854 | 1,750 | 1,732 | o |
| Neponset | Village | Bureau | 519 | 497 | 489 | o |
| New Athens | Village | St. Clair | 1,981 | 1,997 | 1,998 | o |
| New Baden | Village | 3,014 | 3,041 | 3,252 | o | |
| New Bedford | Village | Bureau | 95 | 92 | 90 | o |
| New Berlin | Village | Sangamon | 1,032 | 1,132 | 1,137 | o |
| New Boston | City | Mercer | 632 | 633 | 613 | o |
| New Burnside | Village | Johnson | 242 | 249 | 251 | o |
| New Canton | Town | Pike | 417 | 397 | 380 | o |
| New Douglas | Village | Madison | 329 | 331 | 342 | o |
| New Grand Chain | Village | Pulaski | 233 | 214 | 198 | o |
| New Haven | Village | Gallatin | 479 | 452 | 424 | o |
| New Holland | Village | Logan | 317 | 313 | 303 | o |
| New Lenox | Village | Will | 18,124 | 22,792 | 24,286 | o |
| New Millford | Village | Winnebago | 541 | 555 | 565 | o |
| New Minden | Village | Washington | 204 | 198 | 192 | o |
| New Salem | Village | Pike | 136 | 129 | 124 | o |
| Newark | Village | Kendall | 887 | 1,030 | 1,199 | o |
| Newman | City | Douglas | 956 | 923 | 889 | o |
| Newton | City | Jasper | 3,069 | 2,967 | 2,889 | o |
| Niantic | Village | Macon | 738 | 686 | 663 | o |
| Niles | Village | Cook | 30,068 | 29,062 | 28,513 | o |
| Nilwood | Town | Macoupin | 284 | 280 | 273 | o |
| Noble | Village | Richland | 746 | 710 | 691 | o |
| Nokomis | City | Montgomery | 2,389 | 2,281 | 2,230 | o |
| Nora | Village | Jo Daviess | 118 | 116 | 113 | o |
| Normal | Town | McLean | 45,476 | 49,764 | 52,799 | o |
| Norridge | Village | Cook | 14,582 | 13,926 | 13,876 | o |
| Norris | Village | Fulton | 193 | 187 | 182 | o |
| Norris City | Village | White | 1,061 | 1,036 | 1,013 | o |
| North Aurora | Village | Kane | 10,700 | 14,386 | 15,848 | o |
| North Barrington | Village | Lake | 2,938 | 3,178 | 3,234 | o |
| North Chicago | City | Lake | 35,919 | 33,631 | 32,656 | o |
| North City | Village | Franklin | 630 | 639 | 653 | o |
| North Henderson | Village | Mercer | 187 | 185 | 179 | o |
| North Pekin | Village | Tazewell | 1,603 | 1,654 | 1,722 | o |
| North Riverside | Village | Cook | 6,688 | 6,326 | 6,203 | o |
| North Utica | Village | La Salle | 974 | 979 | 1,051 | o |
| Northbrook | Village | Cook | 33,525 | 33,905 | 33,764 | o |
| Northfield | Village | Cook | 5,560 | 5,500 | 5,463 | o |
| Northlake | City | Cook | 11,895 | 11,253 | 11,380 | o |
| Norwood | Village | Peoria | 473 | 460 | 460 | o |
| O'Fallon | City | St. Clair | 22,151 | 25,656 | 27,778 | o |
| Oak Brook | Village | 8,632 | 8,764 | 8,828 | o | |
| Oak Forest | City | Cook | 28,193 | 27,958 | 27,681 | o |
| Oak Grove | Village | Rock Island | 728 | 726 | 718 | o |
| Oak Lawn | Village | Cook | 55,245 | 53,491 | 52,948 | o |
| Oak Park | Village | Cook | 52,524 | 53,020 | 53,125 | o |
| Oakbrook Terrace | City | DuPage | 2,273 | 2,206 | 2,384 | o |
| Oakdale | Village | Washington | 213 | 205 | 199 | o |
| Oakford | Village | Menard | 309 | 297 | 291 | o |
| Oakland | City | Coles | 996 | 944 | 933 | o |
| Oakwood | Village | Vermilion | 1,502 | 1,463 | 1,427 | o |
| Oakwood Hills | Village | McHenry | 2,198 | 2,326 | 2,395 | o |
| Oblong | Village | Crawford | 1,580 | 1,542 | 1,513 | o |
| Oconee | Village | Shelby | 202 | 190 | 184 | o |
| Odell | Village | Livingston | 1,014 | 1,006 | 994 | o |
| Odin | Village | Marion | 1,122 | 1,073 | 1,050 | o |
| Ogden | Village | Champaign | 747 | 742 | 722 | o |
| Oglesby | City | La Salle | 3,647 | 3,600 | 3,679 | o |
| Ohio | Village | Bureau | 540 | 521 | 514 | o |
| Ohlman | Village | 75 | 144 | 145 | o | |
| Okawville | Village | Washington | 1,355 | 1,325 | 1,329 | o |
| Old Mill Creek | Village | Lake | 251 | 248 | 264 | o |
| Old Ripley | Village | Bond | 127 | 126 | 123 | o |
| Old Shawneetown | Village | Gallatin | 278 | 267 | 251 | o |
| Olmsted | Village | Pulaski | 336 | 309 | 286 | o |
| Olney | City | Richland | 8,799 | 8,543 | 8,392 | o |
| Olympia Fields | Village | Cook | 4,732 | 4,628 | 4,717 | o |
| Omaha | Village | Gallatin | 263 | 247 | 232 | o |
| Onarga | Village | Iroquois | 1,438 | 1,382 | 1,350 | o |
| Oneida | City | Knox | 752 | 708 | 689 | o |
| Oquawka | Village | Henderson | 1,539 | 1,439 | 1,361 | o |
| Orangeville | Village | Stephenson | 751 | 755 | 760 | o |
| Oreana | Village | Macon | 892 | 943 | 914 | o |
| Oregon | City | Ogle | 4,064 | 4,112 | 4,129 | o |
| Orient | City | Franklin | 305 | 313 | 311 | o |
| Orion | Village | Henry | 1,714 | 1,677 | 1,676 | o |
| Orland Hills | Village | Cook | 6,781 | 7,195 | 7,147 | o |
| Orland Park | Village | 51,170 | 54,914 | 55,236 | o | |
| Oswego | Village | Kendall | 13,477 | 23,145 | 29,364 | o |
| Ottawa | City | La Salle | 18,566 | 18,909 | 19,324 | o |
| Otterville | Town | Jersey | 120 | 121 | 120 | o |
| Owaneco | Village | Christian | 256 | 249 | 242 | o |
| Palatine | Village | Cook | 66,276 | 66,688 | 66,690 | o |
| Palestine | Village | Crawford | 1,376 | 1,342 | 1,316 | o |
| Palmer | Village | Christian | 248 | 237 | 231 | o |
| Palmyra | Village | Macoupin | 733 | 720 | 701 | o |
| Palos Heights | City | Cook | 11,261 | 12,435 | 12,387 | o |
| Palos Hills | City | Cook | 17,665 | 17,089 | 16,828 | o |
| Palos Park | Village | Cook | 4,838 | 4,824 | 5,041 | o |
| Pana | City | Christian | 5,950 | 5,805 | 5,685 | o |
| Panama | Village | 323 | 322 | 313 | o | |
| Panola | Village | Woodford | 33 | 33 | 34 | o |
| Papineau | Village | Iroquois | 196 | 199 | 195 | o |
| Paris | City | Edgar | 9,229 | 8,804 | 8,595 | o |
| Park City | City | Lake | 6,644 | 6,729 | 6,710 | o |
| Park Forest | Village | 23,476 | 22,785 | 22,462 | o | |
| Park Ridge | City | Cook | 37,801 | 36,671 | 36,806 | o |
| Parkersburg | Village | Richland | 234 | 230 | 224 | o |
| Patoka | Village | Marion | 633 | 611 | 598 | o |
| Paw Paw | Village | Lee | 852 | 845 | 866 | o |
| Pawnee | Village | Sangamon | 2,647 | 2,577 | 2,550 | o |
| Paxton | City | Ford | 4,599 | 4,488 | 4,465 | o |
| Payson | Village | Adams | 1,066 | 1,056 | 1,051 | o |
| Pearl | Village | Pike | 187 | 178 | 170 | o |
| Pearl City | Village | Stephenson | 785 | 777 | 771 | o |
| Pecatonica | Village | Winnebago | 1,997 | 2,148 | 2,204 | o |
| Pekin | City | 33,942 | 33,267 | 33,580 | o | |
| Peoria | City | Peoria | 113,148 | 112,921 | 115,520 | o |
| Peoria Heights | Village | 6,629 | 6,277 | 6,278 | o | |
| Peotone | Village | Will | 3,394 | 3,892 | 4,317 | o |
| Percy | Village | Randolph | 966 | 939 | 914 | o |
| Perry | Village | Pike | 437 | 411 | 394 | o |
| Peru | City | La Salle | 9,865 | 9,778 | 9,792 | o |
| Pesotum | Village | Champaign | 521 | 511 | 500 | o |
| Petersburg | City | Menard | 2,298 | 2,230 | 2,185 | o |
| Phillipstown | Village | White | 28 | 28 | 27 | o |
| Philo | Village | Champaign | 1,314 | 1,540 | 1,608 | o |
| Phoenix | Village | Cook | 2,157 | 2,050 | 2,034 | o |
| Pierron | Village | 649 | 653 | 645 | o | |
| Pinckneyville | City | Perry | 5,490 | 5,335 | 5,370 | o |
| Pingree Grove | Village | Kane | 186 | 200 | 4,183 | o |
| Piper City | Village | Ford | 781 | 739 | 727 | o |
| Pittsburg | Village | Williamson | 573 | 584 | 586 | o |
| Pittsfield | City | Pike | 4,638 | 4,445 | 4,396 | o |
| Plainfield | Village | Will | 13,295 | 28,228 | 36,659 | o |
| Plainville | Village | Adams | 248 | 245 | 243 | o |
| Plano | City | Kendall | 5,741 | 7,321 | 12,674 | o |
| Plattville | Village | Kendall | 221 | 232 | 266 | o |
| Pleasant Hill | Village | Pike | 1,047 | 994 | 952 | o |
| Pleasant Plains | Village | Sangamon | 777 | 740 | 721 | o |
| Plymouth | Village | 562 | 533 | 512 | o | |
| Pocahontas | Village | Bond | 732 | 724 | 714 | o |
| Polo | City | Ogle | 2,477 | 2,474 | 2,480 | o |
| Pontiac | City | Livingston | 11,970 | 11,307 | 11,261 | o |
| Pontoon Beach | Village | Madison | 5,735 | 6,083 | 6,121 | o |
| Pontoosuc | Village | Hancock | 171 | 163 | 157 | o |
| Poplar Grove | Village | Boone | 1,846 | 3,073 | 4,145 | o |
| Port Barrington | Village | 836 | 1,405 | 1,434 | o | |
| Port Byron | Village | Rock Island | 1,540 | 1,609 | 1,676 | o |
| Posen | Village | Cook | 4,730 | 4,880 | 4,875 | o |
| Potomac | Village | Vermilion | 681 | 660 | 654 | o |
| Prairie City | Village | McDonough | 461 | 434 | 418 | o |
| Prairie du Rocher | Village | Randolph | 613 | 586 | 567 | o |
| Prairie Grove | Village | McHenry | 1,003 | 1,825 | 2,007 | o |
| Princeton | City | Bureau | 7,509 | 7,428 | 7,461 | o |
| Princeville | Village | Peoria | 1,666 | 1,615 | 1,663 | o |
| Prophetstown | City | Whiteside | 2,023 | 1,941 | 1,916 | o |
| Prospect Heights | City | Cook | 17,061 | 16,228 | 15,959 | o |
| Pulaski | Village | Pulaski | 278 | 246 | 227 | o |
| Quincy | City | Adams | 40,745 | 39,665 | 40,061 | o |
| Radom | Village | Washington | 395 | 387 | 381 | o |
| Raleigh | Village | Saline | 330 | 320 | 317 | o |
| Ramsey | Village | Fayette | 1,056 | 1,053 | 1,046 | o |
| Rankin | Village | Vermilion | 617 | 596 | 581 | o |
| Ransom | Village | La Salle | 409 | 388 | 383 | o |
| Rantoul | Village | Champaign | 12,922 | 12,578 | 12,247 | o |
| Rapids City | Village | Rock Island | 955 | 968 | 989 | o |
| Raritan | Village | Henderson | 140 | 127 | 119 | o |
| Raymond | Village | Montgomery | 927 | 907 | 887 | o |
| Red Bud | City | Randolph | 3,430 | 3,496 | 3,619 | o |
| Reddick | Village | 226 | 225 | 225 | o | |
| Redmon | Village | Edgar | 199 | 193 | 187 | o |
| Reynolds | Village | 508 | 488 | 481 | o | |
| Richmond | Village | McHenry | 1,164 | 2,195 | 2,317 | o |
| Richton Park | Village | Cook | 12,546 | 12,878 | 12,805 | o |
| Richview | Village | Washington | 308 | 290 | 284 | o |
| Ridge Farm | Village | Vermilion | 912 | 871 | 851 | o |
| Ridgway | Village | Gallatin | 928 | 872 | 819 | o |
| Ridott | Village | Stephenson | 159 | 151 | 148 | o |
| Ringwood | Village | McHenry | 528 | 538 | 544 | o |
| Rio | Village | Knox | 240 | 227 | 221 | o |
| Ripley | Village | Brown | 103 | 96 | 94 | o |
| River Forest | Village | Cook | 11,635 | 11,169 | 11,128 | o |
| River Grove | Village | Cook | 10,668 | 10,122 | 9,931 | o |
| Riverdale | Village | Cook | 15,055 | 14,449 | 14,080 | o |
| Riverside | Village | Cook | 8,895 | 8,417 | 8,234 | o |
| Riverton | Village | Sangamon | 3,093 | 3,086 | 3,050 | o |
| Riverwoods | Village | Lake | 3,843 | 4,026 | 4,072 | o |
| Roanoke | Village | Woodford | 1,994 | 1,968 | 2,028 | o |
| Robbins | Village | Cook | 6,635 | 6,326 | 6,330 | o |
| Roberts | Village | Ford | 387 | 384 | 376 | o |
| Robinson | City | Crawford | 6,822 | 6,414 | 6,304 | o |
| Rochelle | City | Ogle | 9,677 | 9,809 | 9,858 | o |
| Rochester | Village | Sangamon | 2,891 | 3,005 | 3,246 | o |
| Rock City | Village | Stephenson | 313 | 311 | 317 | o |
| Rock Falls | City | Whiteside | 9,606 | 9,351 | 9,268 | o |
| Rock Island | City | Rock Island | 39,735 | 38,397 | 38,084 | o |
| Rockbridge | Village | Greene | 189 | 185 | 176 | o |
| Rockdale | Village | Will | 1,883 | 1,965 | 2,004 | o |
| Rockford | City | Winnebago | 151,815 | 153,063 | 157,280 | o |
| Rockton | Village | Winnebago | 5,461 | 5,445 | 5,526 | o |
| Rockwood | Village | Randolph | 42 | 41 | 40 | o |
| Rolling Meadows | City | Cook | 24,665 | 23,700 | 23,324 | o |
| Romeoville | Village | Will | 21,234 | 36,734 | 37,997 | o |
| Roodhouse | City | Greene | 2,214 | 2,017 | 1,927 | o |
| Roscoe | Village | Winnebago | 6,259 | 8,696 | 8,813 | o |
| Rose Hill | Village | Jasper | 79 | 77 | 75 | o |
| Roselle | Village | 23,287 | 23,173 | 23,200 | o | |
| Rosemont | Village | Cook | 4,224 | 3,999 | 3,907 | o |
| Roseville | Village | Warren | 1,083 | 995 | 970 | o |
| Rosiclare | City | Hardin | 1,224 | 1,150 | 1,089 | o |
| Rossville | Village | Vermilion | 1,213 | 1,170 | 1,144 | o |
| Round Lake | Village | Lake | 5,882 | 14,877 | 16,752 | o |
| Round Lake Beach | Village | Lake | 25,874 | 27,709 | 27,790 | o |
| Round Lake Heights | Village | Lake | 1,337 | 2,677 | 2,797 | o |
| Round Lake Park | Village | Lake | 6,044 | 6,117 | 6,177 | o |
| Roxana | Village | Madison | 1,611 | 1,571 | 1,552 | o |
| Royal | Village | Champaign | 273 | 273 | 268 | o |
| Royal Lakes | Village | Macoupin | 190 | 189 | 184 | o |
| Royalton | Village | Franklin | 1,130 | 1,162 | 1,155 | o |
| Ruma | Village | Randolph | 281 | 276 | 303 | o |
| Rushville | City | Schuyler | 3,219 | 3,158 | 3,010 | o |
| Russellville | Village | Lawrence | 119 | 118 | 113 | o |
| Rutland | Village | La Salle | 354 | 356 | 350 | o |
| Sadorus | Village | Champaign | 427 | 410 | 397 | o |
| Sailor Springs | Village | Clay | 128 | 126 | 122 | o |
| Salem | City | Marion | 7,904 | 7,461 | 7,312 | o |
| Sammons Point | Village | Otto | 319 | 324 | 324 | o |
| San Jose | Village | 695 | 661 | 638 | o | |
| Sandoval | Village | Marion | 1,434 | 1,349 | 1,318 | o |
| Sandwich | City | 6,552 | 7,103 | 7,381 | o | |
| Sauget | Village | St. Clair | 249 | 242 | 239 | o |
| Sauk Village | Village | 10,411 | 10,404 | 10,221 | o | |
| Saunemin | Village | Livingston | 452 | 438 | 424 | o |
| Savanna | City | Carroll | 3,557 | 3,285 | 3,188 | o |
| Savoy | Village | Champaign | 4,488 | 4,869 | 5,668 | o |
| Sawyerville | Village | Macoupin | 295 | 290 | 282 | o |
| Saybrook | Village | McLean | 764 | 741 | 757 | o |
| Scales Mound | Village | Jo Daviess | 401 | 381 | 376 | o |
| Schaumburg | Village | 75,394 | 72,088 | 71,303 | o | |
| Schiller Park | Village | Cook | 11,777 | 11,417 | 11,431 | o |
| Schram City | Village | Montgomery | 653 | 621 | 607 | o |
| Sciota | Village | McDonough | 58 | 54 | 52 | o |
| Scottville | Village | Macoupin | 140 | 138 | 134 | o |
| Seaton | Village | Mercer | 242 | 230 | 222 | o |
| Seatonville | Village | Bureau | 303 | 300 | 309 | o |
| Secor | Village | Woodford | 379 | 371 | 375 | o |
| Seneca | Village | 2,053 | 2,045 | 2,125 | o | |
| Sesser | City | Franklin | 2,124 | 2,118 | 2,116 | o |
| Shabbona | Village | DeKalb | 929 | 956 | 957 | o |
| Shannon | Village | Carroll | 854 | 795 | 789 | o |
| Shawneetown | City | Gallatin | 1,410 | 1,327 | 1,247 | o |
| Sheffield | Village | Bureau | 946 | 941 | 926 | o |
| Shelbyville | City | Shelby | 4,975 | 4,670 | 4,647 | o |
| Sheldon | Village | Iroquois | 1,232 | 1,165 | 1,130 | o |
| Sheridan | Village | La Salle | 2,411 | 1,872 | 1,958 | o |
| Sherman | Village | Sangamon | 2,883 | 3,475 | 3,873 | o |
| Sherrard | Village | Mercer | 729 | 690 | 668 | o |
| Shiloh | Village | St. Clair | 8,622 | 10,553 | 11,543 | o |
| Shipman | Town | Macoupin | 655 | 646 | 631 | o |
| Shorewood | Village | Will | 8,017 | 12,119 | 15,749 | o |
| Shumway | Village | Effingham | 230 | 231 | 228 | o |
| Sibley | Village | Ford | 329 | 326 | 319 | o |
| Sidell | Village | Vermilion | 626 | 599 | 589 | o |
| Sidney | Village | Champaign | 1,070 | 1,112 | 1,131 | o |
| Sigel | Town | Shelby | 386 | 399 | 387 | o |
| Silvis | City | Rock Island | 7,279 | 7,406 | 7,759 | o |
| Simpson | Village | Johnson | 54 | 56 | 56 | o |
| Sims | Village | Wayne | 273 | 267 | 260 | o |
| Skokie | Village | Cook | 63,354 | 64,674 | 66,468 | o |
| Sleepy Hollow | Village | Kane | 3,561 | 3,641 | 3,712 | o |
| Smithboro | Village | Bond | 200 | 228 | 231 | o |
| Smithfield | Village | Fulton | 214 | 207 | 203 | o |
| Smithton | Village | St. Clair | 2,365 | 2,952 | 3,456 | o |
| Somonauk | Village | 1,430 | 1,737 | 1,823 | o | |
| Sorento | Village | Bond | 601 | 585 | 595 | o |
| South Barrington | Village | Cook | 3,768 | 3,900 | 4,494 | o |
| South Beloit | City | Winnebago | 5,431 | 5,413 | 5,479 | o |
| South Chicago Heights | Village | Cook | 3,970 | 3,839 | 3,760 | o |
| South Elgin | Village | Kane | 16,164 | 20,406 | 21,304 | o |
| South Holland | Village | Cook | 22,239 | 21,440 | 21,045 | o |
| South Jacksonville | Village | Morgan | 3,475 | 3,292 | 3,204 | o |
| South Pekin | Village | Tazewell | 1,162 | 1,203 | 1,200 | o |
| South Roxana | Village | Madison | 1,888 | 1,833 | 1,805 | o |
| South Wilmington | Village | Grundy | 621 | 619 | 640 | o |
| Southern View | Village | Sangamon | 1,794 | 1,685 | 1,640 | o |
| Sparland | Village | Marshall | 504 | 488 | 474 | o |
| Sparta | City | Randolph | 4,581 | 4,426 | 4,317 | o |
| Spaulding | Village | Sangamon | 573 | 780 | 823 | o |
| Spillertown | Village | Williamson | 219 | 223 | 225 | o |
| Spring Bay | Village | Woodford | 436 | 509 | 525 | o |
| Spring Grove | Village | McHenry | 3,944 | 5,293 | 5,807 | o |
| Spring Valley | City | Bureau | 5,448 | 5,318 | 5,416 | o |
| Springerton | Village | White | 134 | 131 | 128 | o |
| Springfield | City | Sangamon | 112,096 | 115,652 | 118,033 | o |
| St. Anne | Village | Kankakee | 1,215 | 1,216 | 1,247 | o |
| St. Augustine | Village | Knox | 152 | 140 | 136 | o |
| St. Charles | City | 27,979 | 32,331 | 32,840 | o | |
| St. David | Village | Fulton | 587 | 558 | 544 | o |
| St. Elmo | City | Fayette | 1,456 | 1,421 | 1,413 | o |
| St. Francisville | City | Lawrence | 759 | 750 | 716 | o |
| St. Jacob | Village | Madison | 961 | 1,051 | 1,093 | o |
| St. Johns | Village | Perry | 218 | 216 | 213 | o |
| St. Joseph | Village | Champaign | 2,965 | 3,668 | 4,051 | o |
| St. Libory | Village | St. Clair | 583 | 601 | 624 | o |
| St. Peter | Village | Fayette | 386 | 383 | 379 | o |
| Standard | Village | Putnam | 258 | 255 | 249 | o |
| Standard City | Village | Macoupin | 138 | 137 | 133 | o |
| Stanford | Village | McLean | 694 | 671 | 686 | o |
| Staunton | City | Macoupin | 5,142 | 5,114 | 5,084 | o |
| Ste. Marie | Village | Jasper | 261 | 253 | 246 | o |
| Steeleville | Village | Randolph | 2,079 | 2,045 | 2,013 | o |
| Steger | Village | 9,679 | 10,215 | 10,422 | o | |
| Sterling | City | Whiteside | 15,814 | 15,212 | 15,053 | o |
| Steward | Village | Lee | 271 | 264 | 258 | o |
| Stewardson | Village | Shelby | 747 | 720 | 716 | o |
| Stickney | Village | Cook | 6,148 | 5,849 | 5,741 | o |
| Stillman Valley | Village | Ogle | 1,048 | 1,082 | 1,114 | o |
| Stockton | Village | Jo Daviess | 1,944 | 1,813 | 1,781 | o |
| Stone Park | Village | Cook | 5,127 | 4,873 | 4,851 | o |
| Stonefort | Village | 292 | 292 | 292 | o | |
| Stonington | Village | Christian | 960 | 916 | 892 | o |
| Stoy | Village | Crawford | 119 | 116 | 114 | o |
| Strasburg | Village | Shelby | 603 | 575 | 561 | o |
| Strawn | Village | Livingston | 104 | 101 | 97 | o |
| Streamwood | Village | Cook | 36,430 | 36,936 | 36,974 | o |
| Streator | City | 14,191 | 13,844 | 13,764 | o | |
| Stronghurst | Village | Henderson | 896 | 825 | 780 | o |
| Sublette | Village | Lee | 456 | 446 | 438 | o |
| Sugar Grove | Village | Kane | 4,001 | 8,239 | 9,736 | o |
| Sullivan | City | Moultrie | 4,355 | 4,302 | 4,396 | o |
| Summerfield | Village | St. Clair | 467 | 485 | 472 | o |
| Summit | Village | Cook | 10,637 | 10,255 | 10,169 | o |
| Sumner | City | Lawrence | 1,022 | 2,678 | 2,966 | o |
| Sun River Terrace | Village | Kankakee | 446 | 440 | 527 | o |
| Swansea | Village | St. Clair | 10,928 | 12,214 | 13,055 | o |
| Sycamore | City | DeKalb | 12,365 | 14,623 | 17,816 | o |
| Symerton | Village | Will | 106 | 112 | 119 | o |
| Table Grove | Village | Fulton | 396 | 383 | 374 | o |
| Tallula | Village | Menard | 638 | 614 | 601 | o |
| Tamaroa | Village | Perry | 740 | 726 | 718 | o |
| Tamms | Village | Alexander | 1,192 | 965 | 900 | o |
| Tampico | Village | Whiteside | 772 | 736 | 725 | o |
| Taylor Springs | Village | Montgomery | 583 | 573 | 560 | o |
| Taylorville | City | Christian | 12,661 | 12,281 | 12,142 | o |
| Tennessee | Village | McDonough | 144 | 136 | 131 | o |
| Teutopolis | Village | Effingham | 1,560 | 1,623 | 1,681 | o |
| Thawville | Village | Iroquois | 258 | 280 | 295 | o |
| Thayer | Village | Sangamon | 750 | 708 | 689 | o |
| Thebes | Village | Alexander | 478 | 429 | 393 | o |
| Third Lake | Village | Lake | 1,359 | 1,384 | 1,382 | o |
| Thomasboro | Village | Champaign | 1,233 | 1,232 | 1,239 | o |
| Thompsonville | Village | Franklin | 571 | 588 | 586 | o |
| Thomson | Village | Carroll | 562 | 536 | 522 | o |
| Thornton | Village | Cook | 2,582 | 2,436 | 2,375 | o |
| Tilden | Village | Randolph | 922 | 902 | 877 | o |
| Tilton | Village | Vermilion | 3,288 | 3,133 | 3,061 | o |
| Timberlane | Village | Boone | 251 | 458 | 615 | o |
| Time | Village | Pike | 29 | 28 | 27 | o |
| Tinley Park | Village | 48,841 | 57,395 | 59,140 | o | |
| Tiskilwa | Village | Bureau | 787 | 755 | 745 | o |
| Toledo | Village | Cumberland | 1,171 | 1,129 | 1,115 | o |
| Tolono | Village | Champaign | 2,714 | 2,798 | 2,882 | o |
| Toluca | City | Marshall | 1,339 | 1,283 | 1,249 | o |
| Tonica | Village | La Salle | 685 | 694 | 695 | o |
| Topeka | Village | Mason | 90 | 87 | 83 | o |
| Toulon | City | Stark | 1,381 | 1,334 | 1,315 | o |
| Tovey | Village | Christian | 516 | 495 | 485 | o |
| Towanda | Village | McLean | 493 | 481 | 492 | o |
| Tower Hill | Village | Shelby | 609 | 595 | 577 | o |
| Tower Lakes | Village | Lake | 1,331 | 1,325 | 1,320 | o |
| Tremont | Village | Tazewell | 2,029 | 2,049 | 2,082 | o |
| Trenton | City | Clinton | 2,629 | 2,647 | 2,628 | o |
| Trout Valley | Village | McHenry | 595 | 598 | 601 | o |
| Troy | City | Madison | 8,522 | 9,387 | 9,855 | o |
| Troy Grove | Village | La Salle | 305 | 305 | 301 | o |
| Tuscola | City | Douglas | 4,481 | 4,521 | 4,570 | o |
| Ullin | Village | Pulaski | 779 | 714 | 688 | o |
| Union | Village | McHenry | 577 | 575 | 620 | o |
| Union Hill | Village | Kankakee | 68 | 65 | 65 | o |
| University Park | Village | 6,706 | 7,902 | 8,222 | o | |
| Urbana | City | Champaign | 37,791 | 38,703 | 39,985 | o |
| Ursa | Village | Adams | 595 | 589 | 585 | o |
| Valier | Village | Franklin | 662 | 654 | 664 | o |
| Valley City | Village | Pike | 14 | 14 | 13 | o |
| Valmeyer | Village | Monroe | 607 | 1,039 | 1,168 | o |
| Vandalia | City | Fayette | 7,001 | 6,395 | 6,295 | o |
| Varna | Village | Marshall | 436 | 423 | 410 | o |
| Venedy | Village | Washington | 137 | 133 | 129 | o |
| Venice | City | Madison | 2,528 | 2,457 | 2,418 | o |
| Vergennes | Village | Jackson | 339 | 343 | 328 | o |
| Vermilion | Village | Edgar | 239 | 224 | 219 | o |
| Vermont | Village | Fulton | 792 | 769 | 751 | o |
| Vernon | Village | Marion | 178 | 173 | 169 | o |
| Vernon Hills | Village | Lake | 20,163 | 23,481 | 24,400 | o |
| Verona | Village | Grundy | 257 | 252 | 259 | o |
| Versailles | Village | Brown | 567 | 541 | 531 | o |
| Victoria | Village | Knox | 325 | 298 | 291 | o |
| Vienna | City | Johnson | 1,261 | 1,296 | 1,305 | o |
| Villa Grove | City | Douglas | 2,553 | 2,470 | 2,389 | o |
| Villa Park | Village | DuPage | 22,106 | 22,460 | 22,225 | o |
| Viola | Village | Mercer | 956 | 944 | 915 | o |
| Virden | City | 3,488 | 3,424 | 3,338 | o | |
| Virgil | Village | Kane | 337 | 371 | 381 | o |
| Virginia | City | Cass | 1,728 | 1,692 | 1,660 | o |
| Volo | Village | Lake | 207 | 228 | 1,044 | o |
| Wadsworth | Village | Lake | 3,360 | 3,796 | 3,876 | o |
| Waggoner | Village | Montgomery | 245 | 243 | 238 | o |
| Walnut | Village | Bureau | 1,463 | 1,400 | 1,390 | o |
| Walnut Hill | Village | Marion | 109 | 105 | 103 | o |
| Walshville | Village | Montgomery | 89 | 88 | 86 | o |
| Waltonville | Village | Jefferson | 428 | 431 | 427 | o |
| Wamac | City | 1,374 | 1,294 | 1,261 | o | |
| Wapella | Village | De Witt | 651 | 634 | 629 | o |
| Warren | Village | Jo Daviess | 1,496 | 1,400 | 1,356 | o |
| Warrensburg | Village | Macon | 1,289 | 1,199 | 1,160 | o |
| Warrenville | City | DuPage | 13,359 | 13,108 | 13,050 | o |
| Warsaw | City | Hancock | 1,793 | 1,639 | 1,572 | o |
| Washburn | Village | 1,152 | 1,101 | 1,111 | o | |
| Washington | City | Tazewell | 11,708 | 12,676 | 14,292 | o |
| Washington Park | Village | St. Clair | 5,942 | 5,699 | 5,554 | o |
| Wataga | Village | Knox | 857 | 799 | 782 | o |
| Waterloo | City | Monroe | 8,140 | 9,256 | 9,980 | o |
| Waterman | Village | DeKalb | 1,241 | 1,250 | 1,529 | o |
| Watseka | City | Iroquois | 5,675 | 5,484 | 5,375 | o |
| Watson | Village | Effingham | 747 | 755 | 746 | o |
| Wauconda | Village | Lake | 9,608 | 10,752 | 12,285 | o |
| Waukegan | City | Lake | 88,002 | 89,853 | 90,622 | o |
| Waverly | City | Morgan | 1,346 | 1,263 | 1,223 | o |
| Wayne | Village | 2,148 | 2,321 | 2,407 | o | |
| Wayne City | Village | Wayne | 1,097 | 1,074 | 1,049 | o |
| Waynesville | Village | De Witt | 452 | 437 | 421 | o |
| Weldon | Village | De Witt | 439 | 424 |