All counties in the State of Illinois.
| Name | Status | Population census 1990-04-01 | Population census 2000-04-01 | Population census 2010-04-01 | |
|---|---|---|---|---|---|
| Adams | County | 66,090 | 68,261 | 67,103 | o |
| Alexander | County | 10,626 | 9,583 | 8,238 | o |
| Bond | County | 14,991 | 17,636 | 17,768 | o |
| Boone | County | 30,806 | 41,788 | 54,165 | o |
| Brown | County | 5,836 | 6,952 | 6,937 | o |
| Bureau | County | 35,688 | 35,496 | 34,978 | o |
| Calhoun | County | 5,322 | 5,079 | 5,089 | o |
| Carroll | County | 16,805 | 16,671 | 15,387 | o |
| Cass | County | 13,437 | 13,691 | 13,642 | o |
| Champaign | County | 173,025 | 179,687 | 201,081 | o |
| Christian | County | 34,418 | 35,380 | 34,800 | o |
| Clark | County | 15,921 | 16,995 | 16,335 | o |
| Clay | County | 14,460 | 14,417 | 13,815 | o |
| Clinton | County | 33,944 | 35,536 | 37,762 | o |
| Coles | County | 51,644 | 53,210 | 53,873 | o |
| Cook | County | 5,105,044 | 5,376,741 | 5,194,675 | o |
| Crawford | County | 19,464 | 20,460 | 19,817 | o |
| Cumberland | County | 10,670 | 11,311 | 11,048 | o |
| De Witt (DeWitt) | County | 16,516 | 16,802 | 16,561 | o |
| DeKalb | County | 77,932 | 88,941 | 105,160 | o |
| Douglas | County | 19,464 | 19,909 | 19,980 | o |
| DuPage | County | 781,689 | 904,594 | 916,924 | o |
| Edgar | County | 19,595 | 19,643 | 18,576 | o |
| Edwards | County | 7,440 | 6,978 | 6,721 | o |
| Effingham | County | 31,704 | 34,267 | 34,242 | o |
| Fayette | County | 20,893 | 21,810 | 22,140 | o |
| Ford | County | 14,275 | 14,227 | 14,081 | o |
| Franklin | County | 40,319 | 39,021 | 39,561 | o |
| Fulton | County | 38,080 | 38,244 | 37,069 | o |
| Gallatin | County | 6,909 | 6,426 | 5,589 | o |
| Greene | County | 15,317 | 14,766 | 13,886 | o |
| Grundy | County | 32,337 | 37,528 | 50,063 | o |
| Hamilton | County | 8,499 | 8,613 | 8,457 | o |
| Hancock | County | 21,373 | 20,171 | 19,104 | o |
| Hardin | County | 5,189 | 4,793 | 4,320 | o |
| Henderson | County | 8,096 | 8,176 | 7,331 | o |
| Henry | County | 51,159 | 51,032 | 50,486 | o |
| Iroquois | County | 30,787 | 31,340 | 29,718 | o |
| Jackson | County | 61,067 | 59,607 | 60,218 | o |
| Jasper | County | 10,609 | 10,113 | 9,698 | o |
| Jefferson | County | 37,020 | 40,051 | 38,827 | o |
| Jersey | County | 20,539 | 21,649 | 22,985 | o |
| Jo Daviess | County | 21,821 | 22,296 | 22,678 | o |
| Johnson | County | 11,347 | 12,877 | 12,582 | o |
| Kane | County | 317,471 | 404,508 | 515,269 | o |
| Kankakee | County | 96,255 | 103,825 | 113,449 | o |
| Kendall | County | 39,413 | 54,539 | 114,736 | o |
| Knox | County | 56,393 | 55,842 | 52,919 | o |
| Lake | County | 516,418 | 644,682 | 703,462 | o |
| LaSalle | County | 106,913 | 111,599 | 113,924 | o |
| Lawrence | County | 15,972 | 15,449 | 16,833 | o |
| Lee | County | 34,392 | 36,062 | 36,031 | o |
| Livingston | County | 39,301 | 39,734 | 38,950 | o |
| Logan | County | 30,798 | 31,199 | 30,305 | o |
| Macon | County | 117,206 | 114,690 | 110,768 | o |
| Macoupin | County | 47,679 | 49,008 | 47,765 | o |
| Madison | County | 249,238 | 259,019 | 269,282 | o |
| Marion | County | 41,561 | 41,678 | 39,437 | o |
| Marshall | County | 12,846 | 13,159 | 12,640 | o |
| Mason | County | 16,269 | 16,034 | 14,666 | o |
| Massac | County | 14,752 | 15,163 | 15,429 | o |
| McDonough | County | 35,244 | 32,906 | 32,612 | o |
| McHenry | County | 183,241 | 259,524 | 308,760 | o |
| McLean | County | 129,180 | 150,384 | 169,572 | o |
| Menard | County | 11,164 | 12,483 | 12,705 | o |
| Mercer | County | 17,290 | 16,940 | 16,434 | o |
| Monroe | County | 22,422 | 27,625 | 32,957 | o |
| Montgomery | County | 30,728 | 30,646 | 30,104 | o |
| Morgan | County | 36,397 | 36,627 | 35,547 | o |
| Moultrie | County | 13,930 | 14,288 | 14,846 | o |
| Ogle | County | 45,957 | 51,001 | 53,497 | o |
| Peoria | County | 182,827 | 183,466 | 186,494 | o |
| Perry | County | 21,412 | 23,091 | 22,350 | o |
| Piatt | County | 15,548 | 16,385 | 16,729 | o |
| Pike | County | 17,577 | 17,362 | 16,430 | o |
| Pope | County | 4,373 | 4,397 | 4,470 | o |
| Pulaski | County | 7,523 | 7,333 | 6,161 | o |
| Putnam | County | 5,730 | 6,077 | 6,006 | o |
| Randolph | County | 34,583 | 33,897 | 33,476 | o |
| Richland | County | 16,545 | 16,291 | 16,233 | o |
| Rock Island | County | 148,723 | 149,390 | 147,546 | o |
| Saline | County | 26,551 | 26,752 | 24,913 | o |
| Sangamon | County | 178,386 | 188,974 | 197,465 | o |
| Schuyler | County | 7,498 | 7,181 | 7,544 | o |
| Scott | County | 5,644 | 5,539 | 5,355 | o |
| Shelby | County | 22,261 | 22,884 | 22,363 | o |
| St. Clair | County | 262,852 | 256,043 | 270,056 | o |
| Stark | County | 6,534 | 6,330 | 5,994 | o |
| Stephenson | County | 48,052 | 48,995 | 47,711 | o |
| Tazewell | County | 123,692 | 128,465 | 135,394 | o |
| Union | County | 17,619 | 18,311 | 17,808 | o |
| Vermilion | County | 88,257 | 83,929 | 81,625 | o |
| Wabash | County | 13,111 | 12,932 | 11,947 | o |
| Warren | County | 19,181 | 18,736 | 17,707 | o |
| Washington | County | 14,965 | 15,150 | 14,716 | o |
| Wayne | County | 17,241 | 17,149 | 16,760 | o |
| White | County | 16,522 | 15,381 | 14,665 | o |
| Whiteside | County | 60,186 | 60,662 | 58,498 | o |
| Will | County | 357,313 | 502,211 | 677,560 | o |
| Williamson | County | 57,733 | 61,300 | 66,357 | o |
| Winnebago | County | 252,913 | 278,441 | 295,266 | o |
| Woodford | County | 32,653 | 35,491 | 38,664 | o |
| Illinois | Federal State | 11,430,602 | 12,419,927 | 12,830,632 |
All places in the State of Illinois.
| Name | Status | County | Population census 1990-04-01 | Population census 2000-04-01 | Population census 2010-04-01 | |
|---|---|---|---|---|---|---|
| Abingdon | City | Knox | 3,670 | 3,612 | 3,319 | o |
| Adair | Census-Designated Place | McDonough | ... | ... | 210 | o |
| Addieville | Village | Washington | 266 | 267 | 252 | o |
| Addison | Village | DuPage | 32,125 | 36,376 | 36,942 | o |
| Adeline | Village | Ogle | 145 | 139 | 85 | o |
| Albany | Village | Whiteside | 845 | 904 | 891 | o |
| Albers | Village | Clinton | 648 | 856 | 1,190 | o |
| Albion | City | Edwards | 2,173 | 1,937 | 1,988 | o |
| Aledo | City | Mercer | 3,755 | 3,613 | 3,640 | o |
| Alexis | Village | 914 | 866 | 831 | o | |
| Algonquin | Village | 12,423 | 22,954 | 30,046 | o | |
| Alhambra | Village | Madison | 725 | 638 | 681 | o |
| Allendale | Village | Wabash | 476 | 528 | 475 | o |
| Allenville | Village | Moultrie | 166 | 154 | 148 | o |
| Allerton | Village | 274 | 293 | 291 | o | |
| Alma | Village | Marion | 391 | 386 | 320 | o |
| Alorton | Village | St. Clair | 2,958 | 2,749 | 2,002 | o |
| Alpha | Village | Henry | 742 | 726 | 671 | o |
| Alsey | Village | Scott | 253 | 243 | 227 | o |
| Alsip | Village | Cook | 18,207 | 19,725 | 19,277 | o |
| Altamont | City | Effingham | 2,332 | 2,285 | 2,319 | o |
| Alto Pass | Village | Union | 426 | 388 | 391 | o |
| Alton | City | Madison | 33,135 | 30,489 | 27,865 | o |
| Altona | Village | Knox | 570 | 570 | 531 | o |
| Alvan | Village | Vermilion | 339 | 316 | 270 | o |
| Amboy | City | Lee | 2,382 | 2,630 | 2,500 | o |
| Anchor | Village | McLean | 178 | 175 | 146 | o |
| Andalusia | Village | Rock Island | 1,060 | 1,081 | 1,178 | o |
| Andover | Village | Henry | 579 | 594 | 578 | o |
| Anna | City | Union | 5,286 | 5,158 | 4,442 | o |
| Annapolis | Census-Designated Place | Crawford | ... | ... | 55 | o |
| Annawan | Town | Henry | 804 | 870 | 878 | o |
| Antioch | Village | Lake | 6,154 | 8,909 | 14,430 | o |
| Apple Canyon Lake | Census-Designated Place | Jo Daviess | ... | ... | 558 | o |
| Apple River | Village | Jo Daviess | 396 | 379 | 366 | o |
| Arcola | City | Douglas | ... | 2,846 | 2,916 | o |
| Arenzville | Village | Cass | 390 | 419 | 409 | o |
| Argenta | Village | Macon | 935 | 930 | 947 | o |
| Arlington | Village | Bureau | 200 | 211 | 193 | o |
| Arlington Heights | Village | 74,739 | 76,429 | 75,101 | o | |
| Armington | Village | Tazewell | 348 | 368 | 343 | o |
| Aroma Park | Village | Kankakee | 692 | 822 | 743 | o |
| Arrowsmith | Village | McLean | 313 | 298 | 294 | o |
| Arthur | Village | 2,160 | 2,223 | 2,288 | o | |
| Ashkum | Village | Iroquois | 670 | 724 | 761 | o |
| Ashland | Village | Cass | 1,257 | 1,361 | 1,333 | o |
| Ashley | City | Washington | 587 | 613 | 536 | o |
| Ashmore | Village | Coles | 817 | 809 | 785 | o |
| Ashton | Village | Lee | 1,036 | 1,142 | 972 | o |
| Assumption | City | Christian | 1,272 | 1,261 | 1,168 | o |
| Astoria | Town | Fulton | 1,181 | 1,193 | 1,141 | o |
| Athens | City | Menard | 1,478 | 1,730 | 1,988 | o |
| Atkinson | Town | Henry | 958 | 1,001 | 972 | o |
| Atlanta | City | Logan | 1,624 | 1,649 | 1,692 | o |
| Atwood | Village | 1,257 | 1,312 | 1,224 | o | |
| Auburn | City | Sangamon | 3,786 | 4,449 | 4,771 | o |
| Augusta | Village | Hancock | 680 | 657 | 587 | o |
| Aurora | City | 100,279 | 143,325 | 197,899 | o | |
| Ava | City | Jackson | 675 | 662 | 654 | o |
| Aviston | Village | Clinton | 1,061 | 1,234 | 1,945 | o |
| Avon | Village | Fulton | 956 | 915 | 799 | o |
| Baldwin | Village | Randolph | ... | 434 | 373 | o |
| Banner | Village | Fulton | 160 | 149 | 189 | o |
| Bannockburn | Village | Lake | 1,376 | 1,429 | 1,583 | o |
| Bardolph | Village | McDonough | 318 | 253 | 251 | o |
| Barrington | Village | 9,432 | 10,174 | 10,327 | o | |
| Barrington Hills | Village | 4,222 | 3,942 | 4,209 | o | |
| Barry | City | Pike | 1,414 | 1,368 | 1,318 | o |
| Bartelso | Village | Clinton | 478 | 602 | 595 | o |
| Bartlett | Village | 19,665 | 36,753 | 41,208 | o | |
| Bartonville | Village | Peoria | 6,573 | 6,336 | 6,471 | o |
| Basco | Village | Hancock | 104 | 107 | 98 | o |
| Batavia | City | 17,587 | 24,271 | 26,045 | o | |
| Batchtown | Village | Calhoun | 225 | 218 | 214 | o |
| Bath | Village | Mason | 388 | 310 | 333 | o |
| Bay View Gardens | Village | Woodford | ... | 379 | 378 | o |
| Baylis | Village | Pike | 257 | 265 | 205 | o |
| Beach Park | Village | Lake | 9,336 | 10,130 | 13,638 | o |
| Beardstown | City | Cass | 5,367 | 5,803 | 6,123 | o |
| Beason | Census-Designated Place | Logan | ... | ... | 189 | o |
| Beaverville | Village | Iroquois | 275 | 391 | 362 | o |
| Beckemeyer | Village | Clinton | 1,081 | 1,070 | 1,040 | o |
| Bedford Park | Village | Cook | 573 | 574 | 580 | o |
| Beecher | Village | Will | ... | 2,114 | 4,359 | o |
| Beecher City | Village | Effingham | 437 | 493 | 463 | o |
| Belgium | Village | Vermilion | 560 | 465 | 404 | o |
| Belknap | Village | Johnson | 125 | 133 | 104 | o |
| Belle Prairie City | Town | Hamilton | 64 | 60 | 54 | o |
| Belle Rive | Village | Jefferson | 396 | 371 | 361 | o |
| Belleville | City | St. Clair | 43,058 | 42,385 | 44,478 | o |
| Bellevue | Village | Peoria | 1,551 | 1,894 | 1,978 | o |
| Bellflower | Village | McLean | 405 | 405 | 357 | o |
| Bellmont | Village | Wabash | 271 | 297 | 276 | o |
| Bellwood | Village | Cook | 20,240 | 20,535 | 19,071 | o |
| Belvidere | City | Boone | 15,771 | 21,089 | 25,585 | o |
| Bement | Village | Piatt | 1,720 | 1,784 | 1,730 | o |
| Benld | City | Macoupin | 1,628 | 1,541 | 1,556 | o |
| Bensenville | Village | 17,857 | 20,714 | 18,352 | o | |
| Benson | Village | Woodford | 410 | 408 | 423 | o |
| Bentley | Town | Hancock | 27 | 43 | 35 | o |
| Benton | City | Franklin | 7,249 | 6,936 | 7,087 | o |
| Berkeley | Village | Cook | 5,141 | 5,245 | 5,209 | o |
| Berlin | Village | Sangamon | ... | 149 | 180 | o |
| Berwyn | City | Cook | 45,538 | 54,016 | 56,657 | o |
| Bethalto | Village | Madison | 9,533 | 9,562 | 9,521 | o |
| Bethany | Village | Moultrie | 1,387 | 1,290 | 1,352 | o |
| Big Rock | Village | Kane | ... | 916 | 1,126 | o |
| Biggsville | Village | Henderson | 349 | 343 | 304 | o |
| Bingham | Village | Fayette | 98 | 117 | 83 | o |
| Bishop Hill | Village | Henry | 131 | 123 | 128 | o |
| Bismarck | Village | Vermilion | 613 | 544 | 579 | o |
| Blandinsville | Village | McDonough | 694 | 772 | 651 | o |
| Bloomingdale | Village | DuPage | 16,672 | 21,724 | 22,018 | o |
| Bloomington | City | McLean | 52,655 | 65,448 | 76,610 | o |
| Blue Island | City | Cook | 21,198 | 23,463 | 23,706 | o |
| Blue Mound | Village | Macon | 1,170 | 1,129 | 1,158 | o |
| Bluffs | Village | Scott | 774 | 751 | 715 | o |
| Bluford | Village | Jefferson | 747 | 785 | 688 | o |
| Bolingbrook | Village | 41,028 | 56,384 | 73,366 | o | |
| Bondville | Village | Champaign | 446 | 455 | 443 | o |
| Bone Gap | Village | Edwards | 271 | 272 | 246 | o |
| Bonfield | Village | Kankakee | 299 | 371 | 382 | o |
| Bonnie | Village | Jefferson | 406 | 424 | 397 | o |
| Boody | Census-Designated Place | Macon | ... | ... | 276 | o |
| Boulder Hill | Census-Designated Place | Kendall | 8,894 | 8,169 | 8,108 | o |
| Bourbonnais | Village | Kankakee | 14,030 | 15,331 | 18,631 | o |
| Bowen | Village | Hancock | 471 | 535 | 494 | o |
| Braceville | Village | Grundy | 590 | 792 | 793 | o |
| Bradford | Village | Stark | 683 | 787 | 768 | o |
| Bradley | Village | Kankakee | 10,820 | 13,023 | 15,895 | o |
| Braidwood | City | Will | 3,667 | 5,232 | 6,191 | o |
| Breese | City | Clinton | 3,712 | 4,087 | 4,442 | o |
| Bridgeport | City | Lawrence | 2,217 | 2,168 | 1,886 | o |
| Bridgeview | Village | Cook | 14,494 | 15,336 | 16,446 | o |
| Brighton | Village | 2,324 | 2,189 | 2,254 | o | |
| Brimfield | Village | Peoria | 799 | 933 | 868 | o |
| Broadlands | Village | Champaign | 339 | 319 | 349 | o |
| Broadview | Village | Cook | 8,406 | 8,264 | 7,932 | o |
| Broadwell | Village | Logan | 161 | 174 | 145 | o |
| Brocton | Village | Edgar | 322 | 322 | 322 | o |
| Brookfield | Village | Cook | 18,836 | 19,085 | 18,978 | o |
| Brooklyn | Village | St. Clair | 1,144 | 676 | 749 | o |
| Brookport | City | Massac | 1,018 | 1,054 | 984 | o |
| Broughton | Village | Hamilton | 218 | 196 | 194 | o |
| Browning | Village | Schuyler | 193 | 130 | 137 | o |
| Browns | Village | Edwards | 207 | 175 | 134 | o |
| Brownstown | Village | Fayette | 725 | 715 | 759 | o |
| Brussels | Village | Calhoun | ... | 147 | 141 | o |
| Bryant | Village | Fulton | 273 | 255 | 220 | o |
| Buckingham | Village | Kankakee | 340 | 237 | 300 | o |
| Buckley | Village | Iroquois | 560 | 593 | 600 | o |
| Buckner | Village | Franklin | 478 | 477 | 462 | o |
| Buda | Village | Bureau | 573 | 592 | 538 | o |
| Buffalo | Village | Sangamon | 503 | 491 | 503 | o |
| Buffalo Grove | Village | 36,653 | 43,221 | 41,496 | o | |
| Bull Valley | Village | McHenry | ... | 1,012 | 1,077 | o |
| Bulpitt | Village | Christian | 206 | 206 | 222 | o |
| Buncombe | Village | Johnson | 211 | 186 | 203 | o |
| Bunker Hill | City | Macoupin | 1,761 | 1,809 | 1,774 | o |
| Burbank | City | Cook | 27,580 | 27,902 | 28,925 | o |
| Bureau Junction | Village | Bureau | 349 | 368 | 322 | o |
| Burlington | Village | Kane | ... | 590 | 618 | o |
| Burnham | Village | Cook | 3,904 | 4,170 | 4,206 | o |
| Burnt Prairie | Village | White | 71 | 58 | 52 | o |
| Burr Ridge | Village | ... | 10,736 | 10,559 | o | |
| Bush | Village | Williamson | 351 | 257 | 275 | o |
| Bushnell | City | McDonough | 3,276 | 3,260 | 3,117 | o |
| Butler | Village | Montgomery | 158 | 197 | 180 | o |
| Byron | City | Ogle | ... | 3,013 | 3,753 | o |
| Cabery | Village | ... | 248 | 266 | o | |
| Cahokia | Village | St. Clair | 17,681 | 16,391 | 15,241 | o |
| Cairo | City | Alexander | 4,911 | 3,632 | 2,831 | o |
| Caledonia | Village | Boone | 209 | 201 | 197 | o |
| Calhoun | Village | Richland | 232 | 222 | 172 | o |
| Calumet City | City | Cook | 37,712 | 39,076 | 37,042 | o |
| Calumet Park | Village | Cook | 8,399 | 8,519 | 7,835 | o |
| Camargo | Village | Douglas | 373 | 467 | 445 | o |
| Cambria | Village | Williamson | 1,239 | 1,333 | 1,228 | o |
| Cambridge | Village | Henry | 2,139 | 2,180 | 2,160 | o |
| Camden | Village | Schuyler | 111 | 97 | 86 | o |
| Camp Point | Village | Adams | 1,230 | 1,256 | 1,132 | o |
| Campbell Hill | Village | Jackson | 351 | 333 | 336 | o |
| Campton Hills | Village | Kane | ... | 9,149 | 11,131 | o |
| Campus | Village | Livingston | 137 | 145 | 166 | o |
| Canton | City | Fulton | 14,050 | 15,318 | 14,704 | o |
| Cantrall | Village | Sangamon | 123 | 139 | 139 | o |
| Capron | Village | Boone | ... | 1,116 | 1,376 | o |
| Carbon Cliff | Village | Rock Island | 1,490 | 1,681 | 2,134 | o |
| Carbon Hill | Village | Grundy | 375 | 392 | 345 | o |
| Carbondale | City | Jackson | ... | 26,257 | 25,902 | o |
| Carlinville | City | Macoupin | ... | 6,048 | 5,917 | o |
| Carlock | Village | McLean | 418 | 456 | 552 | o |
| Carlyle | City | Clinton | 3,509 | 3,411 | 3,281 | o |
| Carmi | City | White | 5,763 | 5,422 | 5,240 | o |
| Carol Stream | Village | DuPage | 31,785 | 40,490 | 39,711 | o |
| Carpentersville | Village | Kane | 23,037 | 30,749 | 37,691 | o |
| Carrier Mills | Village | Saline | 1,993 | 1,888 | 1,653 | o |
| Carrollton | City | Greene | 2,516 | 2,605 | 2,484 | o |
| Carterville | City | Williamson | 4,124 | 4,707 | 5,496 | o |
| Carthage | City | Hancock | 2,763 | 2,724 | 2,605 | o |
| Cary | Village | McHenry | 10,099 | 15,613 | 18,271 | o |
| Casey | City | 3,020 | 2,942 | 2,769 | o | |
| Caseyville | Village | St. Clair | 4,448 | 4,337 | 4,245 | o |
| Catlin | Village | Vermilion | 2,175 | 2,104 | 2,040 | o |
| Cave-In-Rock | Village | Hardin | 381 | 346 | 318 | o |
| Cedar Point | Village | La Salle | 273 | 262 | 277 | o |
| Cedarville | Village | Stephenson | 750 | 719 | 741 | o |
| Central City | Village | Marion | 1,381 | 1,371 | 1,172 | o |
| Centralia | City | 14,633 | 14,409 | 13,032 | o | |
| Centreville | City | St. Clair | 7,432 | 5,951 | 5,309 | o |
| Cerro Gordo | Village | Piatt | 1,436 | 1,440 | 1,403 | o |
| Chadwick | Village | Carroll | 571 | 505 | 551 | o |
| Champaign | City | Champaign | ... | 70,395 | 81,055 | o |
| Chandlerville | Village | Cass | 664 | 704 | 553 | o |
| Channahon | Village | ... | 7,729 | 12,560 | o | |
| Channel Lake | Census-Designated Place | Lake | ... | ... | 1,664 | o |
| Chapin | Village | Morgan | 632 | 592 | 512 | o |
| Charleston | City | Coles | 20,627 | 21,191 | 21,838 | o |
| Chatham | Village | Sangamon | 6,008 | 8,638 | 11,500 | o |
| Chatsworth | Town | Livingston | 1,185 | 1,280 | 1,205 | o |
| Chebanse | Village | 1,094 | 1,151 | 1,062 | o | |
| Chemung | Census-Designated Place | McHenry | ... | ... | 308 | o |
| Chenoa | City | McLean | 1,753 | 1,845 | 1,785 | o |
| Cherry | Village | Bureau | 516 | 509 | 482 | o |
| Cherry Valley | Village | Winnebago | 1,428 | 2,229 | 3,162 | o |
| Chester | City | Randolph | ... | 8,416 | 8,586 | o |
| Chesterfield | Village | Macoupin | 230 | 223 | 188 | o |
| Chestnut | Census-Designated Place | Logan | ... | ... | 246 | o |
| Chicago | City | 2,783,660 | 2,896,017 | 2,695,598 | o | |
| Chicago Heights | City | Cook | 33,070 | 32,805 | 30,276 | o |
| Chicago Ridge | Village | Cook | 13,497 | 14,127 | 14,305 | o |
| Chillicothe | City | Peoria | 5,997 | 6,001 | 6,097 | o |
| Chrisman | City | Edgar | 1,305 | 1,318 | 1,343 | o |
| Christopher | City | Franklin | 2,889 | 2,848 | 2,382 | o |
| Cicero | Town | Cook | 67,355 | 85,616 | 83,891 | o |
| Cisco | Village | Piatt | ... | 284 | 261 | o |
| Cisne | Village | Wayne | 650 | 673 | 672 | o |
| Cissna Park | Village | Iroquois | 805 | 811 | 846 | o |
| Claremont | Village | Richland | 251 | 212 | 176 | o |
| Clarendon Hills | Village | DuPage | 7,085 | 7,797 | 8,427 | o |
| Clay City | Village | Clay | 936 | 994 | 959 | o |
| Clayton | Village | Adams | 726 | 904 | 709 | o |
| Clear Lake | Village | Sangamon | 193 | 267 | 229 | o |
| Cleveland | Village | Henry | 250 | 253 | 188 | o |
| Clifton | Village | Iroquois | 1,347 | 1,317 | 1,468 | o |
| Clinton | City | De Witt | 7,501 | 7,511 | 7,225 | o |
| Coal City | Village | 4,025 | 4,848 | 5,587 | o | |
| Coal Valley | Village | 3,505 | 3,608 | 3,743 | o | |
| Coalton | Village | Montgomery | 325 | 307 | 304 | o |
| Coatsburg | Village | Adams | 199 | 226 | 147 | o |
| Cobden | Village | Union | 1,141 | 1,116 | 1,157 | o |
| Coffeen | City | Montgomery | 733 | 707 | 685 | o |
| Colchester | City | McDonough | 1,552 | 1,500 | 1,401 | o |
| Coleta | Village | Whiteside | 161 | 155 | 164 | o |
| Colfax | Village | McLean | 861 | 989 | 1,061 | o |
| Collinsville | City | 22,744 | 24,929 | 25,579 | o | |
| Colona | City | Henry | 5,072 | 5,213 | 5,099 | o |
| Colp | Village | Williamson | 235 | 224 | 225 | o |
| Columbia | City | 5,938 | 7,960 | 9,707 | o | |
| Columbus | Village | Adams | 88 | 112 | 99 | o |
| Como | Census-Designated Place | Whiteside | ... | ... | 567 | o |
| Compton | Village | Lee | 343 | 347 | 303 | o |
| Concord | Village | Morgan | 172 | 176 | 167 | o |
| Congerville | Village | Woodford | 397 | 466 | 474 | o |
| Cooksville | Village | McLean | 211 | 213 | 182 | o |
| Cordova | Village | Rock Island | 630 | 651 | 672 | o |
| Cornell | Village | Livingston | 556 | 521 | 467 | o |
| Cornland | Census-Designated Place | Logan | ... | ... | 93 | o |
| Cortland | Town | DeKalb | 1,126 | 2,123 | 4,270 | o |
| Coulterville | Village | Randolph | 990 | 1,230 | 945 | o |
| Country Club Hills | City | Cook | 15,389 | 16,169 | 16,541 | o |
| Countryside | City | Cook | 6,062 | 6,068 | 5,895 | o |
| Cowden | Village | Shelby | 599 | 612 | 629 | o |
| Coyne Center | Census-Designated Place | Rock Island | ... | ... | 827 | o |
| Crab Orchard | Census-Designated Place | Williamson | ... | ... | 333 | o |
| Crainville | Village | Williamson | ... | 1,090 | 1,254 | o |
| Creal Springs | City | Williamson | 802 | 702 | 543 | o |
| Crescent City | Village | Iroquois | 542 | 631 | 615 | o |
| Crest Hill | City | Will | 10,829 | 13,509 | 20,837 | o |
| Creston | Village | Ogle | 526 | 543 | 662 | o |
| Crestwood | Village | Cook | 11,122 | 11,251 | 10,950 | o |
| Crete | Village | Will | ... | 7,786 | 8,259 | o |
| Creve Coeur | Village | Tazewell | 5,622 | 5,448 | 5,451 | o |
| Crossville | Village | White | 805 | 782 | 745 | o |
| Crystal Lake | City | McHenry | 25,174 | 38,195 | 40,743 | o |
| Crystal Lawns | Census-Designated Place | Will | ... | ... | 1,872 | o |
| Cuba | City | Fulton | 1,453 | 1,418 | 1,294 | o |
| Cullom | Village | Livingston | 568 | 556 | 555 | o |
| Curran | Village | Sangamon | ... | 249 | 212 | o |
| Cutler | Village | Perry | 523 | 543 | 441 | o |
| Cypress | Village | Johnson | 284 | 271 | 234 | o |
| Dahlgren | Village | Hamilton | 512 | 514 | 525 | o |
| Dakota | Village | Stephenson | 549 | 499 | 506 | o |
| Dallas City | City | 1,094 | 1,055 | 945 | o | |
| Dalton City | Village | Moultrie | 580 | 581 | 544 | o |
| Dalzell | Village | 648 | 717 | 717 | o | |
| Damiansville | Village | Clinton | 441 | 372 | 491 | o |
| Dana | Village | La Salle | 162 | 173 | 159 | o |
| Danforth | Village | Iroquois | 460 | 587 | 604 | o |
| Danvers | Village | McLean | 1,037 | 1,183 | 1,154 | o |
| Danville | City | Vermilion | 35,045 | 34,466 | 33,027 | o |
| Darien | City | DuPage | 20,575 | 22,937 | 22,086 | o |
| Darmstadt | Census-Designated Place | St. Clair | ... | ... | 68 | o |
| Davis | Village | Stephenson | 539 | 662 | 677 | o |
| Davis Junction | Village | Ogle | ... | 940 | 2,373 | o |
| Dawson | Village | Sangamon | ... | 512 | 509 | o |
| Dayton | Census-Designated Place | LaSalle | ... | ... | 537 | o |
| De Land | Village | Piatt | 458 | 475 | 446 | o |
| De Pue | Village | Bureau | 1,733 | 1,842 | 1,838 | o |
| De Soto | Village | Jackson | 1,508 | 1,653 | 1,590 | o |
| De Witt | Village | De Witt | 122 | 188 | 184 | o |
| Decatur | City | Macon | 85,424 | 82,121 | 76,122 | o |
| Deer Creek | Village | 634 | 608 | 704 | o | |
| Deer Grove | Village | Whiteside | 21 | 48 | 48 | o |
| Deer Park | Village | 2,757 | 3,132 | 3,200 | o | |
| Deerfield | Village | 17,342 | 18,422 | 18,225 | o | |
| DeKalb | City | DeKalb | 36,044 | 39,029 | 43,862 | o |
| Delavan | City | Tazewell | 1,595 | 1,825 | 1,689 | o |
| Des Plaines | City | Cook | 54,917 | 57,132 | 58,364 | o |
| Detroit | Village | Pike | 126 | 93 | 83 | o |
| Diamond | Village | 1,055 | 1,393 | 2,527 | o | |
| Dieterich | Village | Effingham | 593 | 602 | 617 | o |
| Divernon | Village | Sangamon | 1,160 | 1,203 | 1,172 | o |
| Dix | Village | Jefferson | 473 | 494 | 461 | o |
| Dixmoor | Village | Cook | 3,684 | 3,934 | 3,644 | o |
| Dixon | City | Lee | 15,488 | 16,030 | 15,733 | o |
| Dolton | Village | Cook | 24,011 | 25,612 | 23,153 | o |
| Dongola | Village | Union | 733 | 806 | 726 | o |
| Donnellson | Village | ... | 262 | 210 | o | |
| Donovan | Village | Iroquois | 361 | 351 | 304 | o |
| Dorchester | Village | Macoupin | 153 | 142 | 151 | o |
| Dover | Village | Bureau | 159 | 172 | 168 | o |
| Dowell | Village | Jackson | 465 | 443 | 408 | o |
| Downers Grove | Village | DuPage | 47,493 | 49,644 | 47,833 | o |
| Downs | Village | McLean | 624 | 778 | 1,005 | o |
| Du Bois | Village | Washington | 260 | 222 | 205 | o |
| Du Quoin | City | Perry | 6,971 | 6,470 | 6,109 | o |
| Dunfermline | Village | Fulton | 265 | 262 | 300 | o |
| Dunlap | Village | Peoria | ... | 966 | 1,386 | o |
| Dupo | Village | St. Clair | 3,537 | 3,930 | 4,138 | o |
| Durand | Village | Winnebago | 1,147 | 1,077 | 1,443 | o |
| Dwight | Village | 4,251 | 4,375 | 4,260 | o | |
| Eagarville | Village | Macoupin | 120 | 128 | 127 | o |
| Earlville | City | La Salle | 1,506 | 1,803 | 1,701 | o |
| East Alton | Village | Madison | 7,212 | 6,830 | 6,301 | o |
| East Brooklyn | Village | Grundy | 92 | 123 | 106 | o |
| East Cape Girardeau | Village | Alexander | 451 | 437 | 385 | o |
| East Carondelet | Village | St. Clair | ... | 315 | 499 | o |
| East Dubuque | City | Jo Daviess | 2,020 | 2,004 | 1,704 | o |
| East Dundee | Village | 2,673 | 2,957 | 2,860 | o | |
| East Galesburg | Village | Knox | 668 | 839 | 812 | o |
| East Gillespie | Village | Macoupin | 193 | 234 | 270 | o |
| East Hazel Crest | Village | Cook | 1,567 | 1,607 | 1,543 | o |
| East Moline | City | Rock Island | ... | 21,513 | 21,302 | o |
| East Peoria | City | Tazewell | 22,629 | 22,698 | 23,402 | o |
| East St. Louis | City | St. Clair | 40,865 | 31,622 | 27,006 | o |
| Easton | Village | Mason | 351 | 373 | 321 | o |
| Eddyville | Village | Pope | 151 | 153 | 101 | o |
| Edgewood | Village | Effingham | 502 | 527 | 440 | o |
| Edinburg | Village | Christian | 1,016 | 1,138 | 1,078 | o |
| Edwardsville | City | Madison | ... | 22,299 | 24,293 | o |
| Effingham | City | Effingham | 12,135 | 12,400 | 12,328 | o |
| El Dara | Village | Pike | 86 | 89 | 78 | o |
| El Paso | City | 2,566 | 2,738 | 2,810 | o | |
| Elburn | Village | Kane | 1,328 | 2,774 | 5,602 | o |
| Eldorado | City | Saline | 4,818 | 4,539 | 4,122 | o |
| Eldred | Village | Greene | 254 | 211 | 201 | o |
| Elgin | City | 77,353 | 94,814 | 108,188 | o | |
| Elizabeth | Village | Jo Daviess | 721 | 684 | 761 | o |
| Elizabethtown | Village | Hardin | 427 | 348 | 299 | o |
| Elk Grove Village | Village | 33,487 | 34,725 | 33,127 | o | |
| Elkhart | Village | Logan | 475 | 443 | 405 | o |
| Elkville | Village | Jackson | 958 | 985 | 928 | o |
| Elliott | Village | Ford | 309 | 341 | 295 | o |
| Ellis Grove | Village | Randolph | 439 | 381 | 363 | o |
| Ellisville | Village | Fulton | 116 | 87 | 96 | o |
| Ellsworth | Village | McLean | 224 | 271 | 195 | o |
| Elmhurst | City | 41,929 | 42,999 | 44,121 | o | |
| Elmwood | City | Peoria | 1,849 | 1,944 | 2,097 | o |
| Elmwood Park | Village | Cook | 23,206 | 25,405 | 24,883 | o |
| Elsah | Village | Jersey | 886 | 635 | 673 | o |
| Elvaston | Village | Hancock | 198 | 152 | 165 | o |
| Elwood | Village | Will | 1,020 | 1,622 | 2,279 | o |
| Emden | Village | Logan | 459 | 518 | 485 | o |
| Emington | Village | Livingston | 135 | 120 | 117 | o |
| Energy | Village | Williamson | 1,075 | 1,175 | 1,146 | o |
| Enfield | Village | White | 683 | 625 | 596 | o |
| Equality | Village | Gallatin | 746 | 721 | 595 | o |
| Erie | Village | Whiteside | 1,512 | 1,589 | 1,602 | o |
| Essex | Village | Kankakee | 468 | 544 | 802 | o |
| Eureka | City | Woodford | ... | 5,035 | 5,295 | o |
| Evanston | City | Cook | 73,234 | 74,250 | 74,486 | o |
| Evansville | Village | Randolph | 849 | 730 | 701 | o |
| Evergreen Park | Village | Cook | 20,874 | 20,821 | 19,852 | o |
| Ewing | Village | Franklin | 264 | 310 | 307 | o |
| Exeter | Village | Scott | 59 | 70 | 65 | o |
| Fairbury | City | Livingston | 3,669 | 3,980 | 3,757 | o |
| Fairfield | City | Wayne | 5,579 | 5,410 | 5,154 | o |
| Fairmont | Census-Designated Place | Will | ... | ... | 2,459 | o |
| Fairmont City | Village | 2,125 | 2,439 | 2,635 | o | |
| Fairmount | Village | Vermilion | 680 | 640 | 642 | o |
| Fairview | Village | Fulton | 510 | 493 | 522 | o |
| Fairview Heights | City | St. Clair | 14,909 | 14,995 | 17,078 | o |
| Farina | Village | 575 | 558 | 518 | o | |
| Farmer City | City | De Witt | 2,128 | 2,055 | 2,037 | o |
| Farmersville | Village | Montgomery | 689 | 768 | 724 | o |
| Farmington | City | Fulton | 2,672 | 2,603 | 2,448 | o |
| Fayetteville | Village | St. Clair | 249 | 384 | 366 | o |
| Ferris | Village | Hancock | 160 | 168 | 156 | o |
| Fidelity | Village | Jersey | 127 | 105 | 114 | o |
| Fieldon | Village | Jersey | 277 | 271 | 239 | o |
| Fillmore | Village | Montgomery | 343 | 362 | 330 | o |
| Findlay | Village | Shelby | 787 | 723 | 683 | o |
| Fisher | Village | Champaign | 1,555 | 1,651 | 1,881 | o |
| Fithian | Village | Vermilion | 507 | 506 | 485 | o |
| Flanagan | Village | Livingston | 1,052 | 1,083 | 1,110 | o |
| Flat Rock | Village | Crawford | 421 | 415 | 331 | o |
| Flora | City | Clay | 5,155 | 5,065 | 5,070 | o |
| Floraville | Census-Designated Place | St. Clair | ... | ... | 53 | o |
| Florence | Village | Pike | 45 | 71 | 38 | o |
| Flossmoor | Village | Cook | 8,855 | 9,333 | 9,464 | o |
| Foosland | Village | Champaign | 132 | 90 | 101 | o |
| Ford Heights | Village | Cook | 4,272 | 3,448 | 2,763 | o |
| Forest City | Village | Mason | 321 | 287 | 246 | o |
| Forest Lake | Census-Designated Place | Lake | ... | ... | 1,659 | o |
| Forest Park | Village | Cook | 14,836 | 15,688 | 14,167 | o |
| Forest View | Village | Cook | 745 | 778 | 698 | o |
| Forrest | Village | Livingston | 1,130 | 1,225 | 1,220 | o |
| Forreston | Village | Ogle | 1,368 | 1,474 | 1,446 | o |
| Forsyth | Village | Macon | 1,710 | 2,442 | 3,490 | o |
| Fox Lake | Village | 7,683 | 9,189 | 10,579 | o | |
| Fox Lake Hills | Census-Designated Place | Lake | ... | 2,561 | 2,591 | o |
| Fox River Grove | Village | 3,629 | 4,971 | 4,854 | o | |
| Frankfort | Village | 7,352 | 10,482 | 17,782 | o | |
| Frankfort Square | Census-Designated Place | Will | ... | ... | 9,276 | o |
| Franklin | Village | Morgan | ... | 619 | 610 | o |
| Franklin Grove | Village | Lee | 967 | 1,065 | 1,021 | o |
| Franklin Park | Village | Cook | 18,485 | 19,504 | 18,333 | o |
| Freeburg | Village | St. Clair | ... | 4,084 | 4,354 | o |
| Freeman Spur | Village | 296 | 273 | 287 | o | |
| Freeport | City | Stephenson | 26,210 | 26,460 | 25,638 | o |
| Fulton | City | Whiteside | 3,706 | 3,888 | 3,481 | o |
| Fults | Village | Monroe | 65 | 28 | 26 | o |
| Gages Lake | Census-Designated Place | Lake | 8,349 | 10,415 | 10,198 | o |
| Galatia | Village | Saline | 1,011 | 1,013 | 933 | o |
| Galena | City | Jo Daviess | 3,620 | 3,473 | 3,429 | o |
| Galesburg | City | Knox | 33,748 | 33,786 | 32,195 | o |
| Galva | City | Henry | 2,782 | 2,798 | 2,589 | o |
| Garden Prairie | Village | Boone | ... | 337 | 352 | o |
| Gardner | Village | Grundy | 1,242 | 1,435 | 1,463 | o |
| Garrett | Village | Douglas | 175 | 198 | 162 | o |
| Gays | Village | Moultrie | 237 | 265 | 281 | o |
| Geneseo | City | Henry | 6,009 | 6,496 | 6,586 | o |
| Geneva | City | Kane | 12,905 | 19,613 | 21,495 | o |
| Genoa | City | DeKalb | 3,285 | 4,209 | 5,193 | o |
| Georgetown | Census-Designated Place | McDonough | ... | ... | 404 | o |
| Georgetown | City | Vermilion | 3,816 | 3,628 | 3,474 | o |
| German Valley | Village | Stephenson | 491 | 479 | 463 | o |
| Germantown | Village | Clinton | ... | 1,196 | 1,269 | o |
| Germantown Hills | Village | Woodford | ... | 2,266 | 3,438 | o |
| Gibson City | City | Ford | 3,392 | 3,389 | 3,407 | o |
| Gifford | Village | Champaign | 858 | 835 | 975 | o |
| Gilberts | Village | Kane | 1,003 | 1,289 | 6,879 | o |
| Gillespie | City | Macoupin | 3,639 | 3,407 | 3,319 | o |
| Gilman | City | Iroquois | 1,818 | 1,793 | 1,814 | o |
| Gilson | Census-Designated Place | Knox | ... | ... | 190 | o |
| Girard | City | Macoupin | 2,185 | 2,245 | 2,103 | o |
| Gladstone | Village | Henderson | 270 | 284 | 281 | o |
| Glasford | Village | Peoria | 1,123 | 1,076 | 1,022 | o |
| Glasgow | Village | Scott | 163 | 170 | 141 | o |
| Glen Carbon | Village | Madison | 7,889 | 10,570 | 12,934 | o |
| Glen Ellyn | Village | DuPage | 25,409 | 27,207 | 27,450 | o |
| Glencoe | Village | Cook | 8,423 | 8,722 | 8,723 | o |
| Glendale Heights | Village | DuPage | 27,610 | 31,865 | 34,208 | o |
| Glenview | Village | Cook | 39,288 | 43,073 | 44,692 | o |
| Glenwood | Village | Cook | 9,279 | 9,032 | 8,969 | o |
| Godfrey | Village | Madison | 15,660 | 16,787 | 17,982 | o |
| Godley | Village | 345 | 594 | 601 | o | |
| Golconda | City | Pope | 823 | 724 | 668 | o |
| Golden | Village | Adams | 565 | 629 | 644 | o |
| Golden Gate | Village | Wayne | 88 | 100 | 68 | o |
| Golf | Village | Cook | 450 | 451 | 500 | o |
| Good Hope | Village | McDonough | 416 | 416 | 396 | o |
| Goodfield | Village | 478 | 694 | 860 | o | |
| Goofy Ridge | Census-Designated Place | Mason | ... | ... | 350 | o |
| Goreville | Village | Johnson | 875 | 941 | 1,049 | o |
| Gorham | Village | Jackson | 313 | 256 | 236 | o |
| Grafton | City | Jersey | ... | 558 | 674 | o |
| Grand Detour | Census-Designated Place | Ogle | ... | ... | 429 | o |
| Grand Ridge | Village | La Salle | 575 | 546 | 560 | o |
| Grand Tower | City | Jackson | 759 | 624 | 605 | o |
| Grandview | Village | Sangamon | 1,637 | 1,537 | 1,441 | o |
| Grandwood Park | Census-Designated Place | Lake | ... | 4,521 | 5,202 | o |
| Granite City | City | Madison | 33,132 | 31,980 | 29,849 | o |
| Grant Park | Village | Kankakee | 1,089 | 1,392 | 1,331 | o |
| Grantfork | Village | Madison | 258 | 258 | 337 | o |
| Granville | Village | Putnam | 1,400 | 1,414 | 1,427 | o |
| Grayslake | Village | Lake | 7,746 | 18,532 | 20,957 | o |
| Grayville | City | 2,045 | 1,747 | 1,666 | o | |
| Green Oaks | Village | Lake | 2,180 | 3,581 | 3,866 | o |
| Green Valley | Village | Tazewell | 736 | 728 | 709 | o |
| Greenfield | City | Greene | 1,170 | 1,179 | 1,071 | o |
| Greenup | Village | Cumberland | 1,616 | 1,542 | 1,513 | o |
| Greenview | Village | Menard | 850 | 862 | 778 | o |
| Greenville | City | Bond | 5,283 | 7,017 | 7,000 | o |
| Greenwood | Village | McHenry | 216 | 248 | 255 | o |
| Gridley | Village | McLean | 1,304 | 1,417 | 1,432 | o |
| Griggsville | City | Pike | 1,241 | 1,261 | 1,226 | o |
| Gulf Port | Village | Henderson | 209 | 207 | 54 | o |
| Gurnee | Village | Lake | 13,838 | 28,816 | 31,295 | o |
| Hainesville | Village | Lake | 176 | 2,074 | 3,597 | o |
| Hamburg | Village | Calhoun | 150 | 126 | 128 | o |
| Hamel | Village | Madison | 520 | 570 | 816 | o |
| Hamilton | City | Hancock | 3,293 | 3,029 | 2,951 | o |
| Hammond | Village | Piatt | 527 | 518 | 509 | o |
| Hampshire | Village | Kane | 1,946 | 2,941 | 5,563 | o |
| Hampton | Village | Rock Island | 1,586 | 1,630 | 1,863 | o |
| Hanaford | Village | Franklin | ... | 214 | 327 | o |
| Hanna City | Village | Peoria | 1,115 | 1,010 | 1,225 | o |
| Hanover | Village | Jo Daviess | 931 | 857 | 844 | o |
| Hanover Park | Village | 32,910 | 38,306 | 37,973 | o | |
| Hardin | Village | Calhoun | 1,071 | 959 | 967 | o |
| Harmon | Village | Lee | 186 | 149 | 120 | o |
| Harrisburg | City | Saline | 9,690 | 9,898 | 9,017 | o |
| Harrison | Census-Designated Place | Jackson | ... | ... | 970 | o |
| Harristown | Village | Macon | 1,329 | 1,345 | 1,367 | o |
| Hartford | Village | Madison | 1,679 | 1,545 | 1,429 | o |
| Hartsburg | Village | Logan | 306 | 358 | 314 | o |
| Harvard | City | McHenry | 6,067 | 8,090 | 9,447 | o |
| Harvel | Village | 213 | 235 | 223 | o | |
| Harvey | City | Cook | 30,283 | 30,000 | 25,282 | o |
| Harwood Heights | Village | Cook | 7,715 | 8,297 | 8,612 | o |
| Havana | City | Mason | 3,674 | 3,577 | 3,301 | o |
| Hawthorn Woods | Village | Lake | 4,302 | 6,102 | 7,663 | o |
| Hazel Crest | Village | Cook | 13,366 | 14,816 | 14,100 | o |
| Hebron | Village | McHenry | ... | 1,133 | 1,216 | o |
| Hecker | Village | 534 | 475 | 481 | o | |
| Henderson | Village | Knox | 290 | 319 | 255 | o |
| Hennepin | Village | Putnam | 669 | 707 | 757 | o |
| Henning | Village | Vermilion | 273 | 241 | 251 | o |
| Henry | City | Marshall | 2,665 | 2,540 | 2,464 | o |
| Heritage Lake | Census-Designated Place | Tazewell | ... | ... | 1,520 | o |
| Herrick | Village | Shelby | 466 | 524 | 436 | o |
| Herrin | City | Williamson | 11,073 | 11,484 | 12,501 | o |
| Herscher | Village | Kankakee | 1,278 | 1,524 | 1,591 | o |
| Hettick | Village | Macoupin | 211 | 182 | 181 | o |
| Heyworth | Village | McLean | 1,666 | 2,458 | 2,841 | o |
| Hickory Hills | City | Cook | 13,033 | 13,926 | 14,049 | o |
| Hidalgo | Village | Jasper | 122 | 123 | 106 | o |
| Highland | City | Madison | 7,747 | 8,500 | 9,919 | o |
| Highland Park | City | Lake | ... | 30,257 | 29,763 | o |
| Highwood | City | Lake | ... | 5,470 | 5,405 | o |
| Hillcrest | Village | Ogle | 828 | 1,158 | 1,326 | o |
| Hillsboro | City | Montgomery | ... | 6,373 | 6,207 | o |
| Hillsdale | Village | Rock Island | 564 | 588 | 523 | o |
| Hillside | Village | Cook | 7,667 | 8,155 | 8,157 | o |
| Hillview | Village | Greene | 271 | 179 | 193 | o |
| Hinckley | Village | DeKalb | 1,765 | 1,989 | 2,070 | o |
| Hindsboro | Village | Douglas | 345 | 361 | 313 | o |
| Hinsdale | Village | 16,011 | 17,452 | 16,816 | o | |
| Hodgkins | Village | Cook | 1,956 | 2,134 | 1,897 | o |
| Hoffman | Village | Clinton | 492 | 463 | 508 | o |
| Hoffman Estates | Village | 46,367 | 49,676 | 51,895 | o | |
| Holiday Hills | Village | McHenry | ... | 727 | 610 | o |
| Holiday Shores | Census-Designated Place | Madison | ... | ... | 2,882 | o |
| Hollowayville | Village | Bureau | 30 | 91 | 84 | o |
| Homer | Village | Champaign | 1,282 | 1,200 | 1,193 | o |
| Homer Glen | Village | Will | ... | 22,210 | 24,220 | o |
| Hometown | City | Cook | 4,769 | 4,467 | 4,349 | o |
| Homewood | Village | Cook | 19,072 | 19,543 | 19,323 | o |
| Hoopeston | City | Vermilion | 5,857 | 5,995 | 5,351 | o |
| Hooppole | Village | Henry | 196 | 162 | 204 | o |
| Hopedale | Village | Tazewell | 817 | 926 | 865 | o |
| Hopewell | Village | Marshall | 354 | 396 | 410 | o |
| Hopkins Park | Village | Kankakee | ... | 755 | 603 | o |
| Hoyleton | Village | Washington | 659 | 520 | 531 | o |
| Hudson | Village | McLean | 1,008 | 1,512 | 1,838 | o |
| Huey | Village | Clinton | 210 | 196 | 169 | o |
| Hull | Village | Pike | 514 | 474 | 461 | o |
| Humboldt | Village | Coles | 481 | 479 | 437 | o |
| Hume | Village | Edgar | 413 | 380 | 380 | o |
| Huntley | Village | 2,665 | 5,765 | 24,291 | o | |
| Hurst | City | Williamson | 858 | 805 | 795 | o |
| Hutsonville | Village | Crawford | ... | 633 | 554 | o |
| Illiopolis | Village | Sangamon | 903 | 916 | 891 | o |
| Ina | Village | Jefferson | 489 | 2,460 | 2,338 | o |
| Indian Creek | Village | Lake | 205 | 194 | 462 | o |
| Indian Head Park | Village | Cook | 3,343 | 3,685 | 3,809 | o |
| Indianola | Village | Vermilion | ... | 224 | 276 | o |
| Industry | Village | McDonough | 571 | 545 | 478 | o |
| Ingalls Park | Census-Designated Place | Will | 3,173 | 3,082 | 3,314 | o |
| Inverness | Village | Cook | ... | 6,987 | 7,399 | o |
| Iola | Village | Clay | 163 | 171 | 141 | o |
| Ipava | Village | Fulton | 463 | 508 | 470 | o |
| Iroquois | Village | Iroquois | 199 | 207 | 154 | o |
| Irving | Village | Montgomery | ... | 495 | 495 | o |
| Irvington | Village | Washington | 827 | 736 | 659 | o |
| Irwin | Village | Kankakee | ... | 71 | 74 | o |
| Island Lake | Village | 4,529 | 8,164 | 8,080 | o | |
| Itasca | Village | DuPage | 6,974 | 8,345 | 8,649 | o |
| Iuka | Village | Marion | 425 | 598 | 489 | o |
| Ivesdale | Village | 339 | 288 | 267 | o | |
| Jacksonville | City | Morgan | ... | 20,004 | 19,446 | o |
| Jeffersonville | Village | Wayne | 311 | 366 | 367 | o |
| Jeisyville | Village | Christian | 135 | 128 | 107 | o |
| Jerome | Village | Sangamon | 1,560 | 1,414 | 1,656 | o |
| Jerseyville | City | Jersey | 7,425 | 8,025 | 8,465 | o |
| Jewett | Village | Cumberland | 194 | 232 | 223 | o |
| Johnsburg | Village | McHenry | 4,527 | 5,416 | 6,337 | o |
| Johnsonville | Village | Wayne | 68 | 69 | 77 | o |
| Johnston City | City | Williamson | 3,750 | 3,558 | 3,543 | o |
| Joliet | City | 78,585 | 107,165 | 147,433 | o | |
| Jonesboro | City | Union | 1,821 | 1,841 | 1,821 | o |
| Joppa | Village | Massac | 498 | 409 | 360 | o |
| Joy | Village | Mercer | 454 | 373 | 417 | o |
| Junction | Village | Gallatin | 201 | 139 | 129 | o |
| Junction City | Village | Marion | 536 | 559 | 482 | o |
| Justice | Village | Cook | 11,117 | 12,200 | 12,926 | o |
| Kampsville | Village | Calhoun | 389 | 302 | 328 | o |
| Kane | Village | Greene | 456 | 459 | 438 | o |
| Kaneville | Village | Kane | ... | 446 | 484 | o |
| Kangley | Village | La Salle | 250 | 287 | 251 | o |
| Kankakee | City | Kankakee | 27,972 | 27,703 | 27,537 | o |
| Kansas | Village | Edgar | 871 | 842 | 787 | o |
| Kappa | Village | Woodford | 109 | 172 | 227 | o |
| Karnak | Village | Pulaski | 581 | 619 | 499 | o |
| Kaskaskia | Village | Randolph | 47 | 9 | 14 | o |
| Keenes | Village | Wayne | 62 | 99 | 83 | o |
| Keensburg | Village | Wabash | 238 | 254 | 210 | o |
| Keithsburg | City | Mercer | 747 | 714 | 609 | o |
| Kell | Village | Marion | 232 | 231 | 219 | o |
| Kempton | Village | Ford | 219 | 235 | 231 | o |
| Kenilworth | Village | Cook | 2,420 | 2,494 | 2,513 | o |
| Kenney | Village | De Witt | 390 | 374 | 326 | o |
| Kewanee | City | Henry | 13,120 | 12,982 | 12,916 | o |
| Keyesport | Village | 441 | 486 | 421 | o | |
| Kilbourne | Village | Mason | 350 | 375 | 302 | o |
| Kildeer | Village | Lake | 2,567 | 3,517 | 3,968 | o |
| Kincaid | Village | Christian | 1,353 | 1,442 | 1,505 | o |
| Kinderhook | Village | Pike | 257 | 249 | 216 | o |
| Kingston | Village | DeKalb | 603 | 979 | 1,164 | o |
| Kingston Mines | Village | Peoria | 297 | 259 | 302 | o |
| Kinmundy | City | Marion | 959 | 892 | 796 | o |
| Kinsman | Village | Grundy | 112 | 109 | 99 | o |
| Kirkland | Village | DeKalb | 1,005 | 1,170 | 1,744 | o |
| Kirkwood | Village | Warren | 887 | 794 | 714 | o |
| Knollwood | Census-Designated Place | Lake | ... | ... | 1,747 | o |
| Knoxville | City | Knox | 3,298 | 3,178 | 2,911 | o |
| La Fayette | Village | Stark | 231 | 227 | 223 | o |
| La Grange | Village | Cook | 18,575 | 15,608 | 15,550 | o |
| La Grange Park | Village | Cook | 9,600 | 13,295 | 13,579 | o |
| La Harpe | City | Hancock | 1,407 | 1,385 | 1,235 | o |
| La Moille | Village | Bureau | 658 | 773 | 726 | o |
| La Prairie | Village | Adams | 68 | 60 | 47 | o |
| La Rose | Village | Marshall | 130 | 159 | 144 | o |
| Lacon | City | Marshall | 2,015 | 1,979 | 1,937 | o |
| Ladd | Village | Bureau | 1,283 | 1,311 | 1,295 | o |
| Lake Barrington | Village | Lake | 4,114 | 4,756 | 4,973 | o |
| Lake Bluff | Village | Lake | 5,526 | 6,056 | 5,722 | o |
| Lake Camelot | Census-Designated Place | Peoria | ... | ... | 1,686 | o |
| Lake Catherine | Census-Designated Place | Lake | ... | ... | 1,379 | o |
| Lake Forest | City | Lake | 17,775 | 20,081 | 19,375 | o |
| Lake Holiday | Census-Designated Place | LaSalle | ... | ... | 4,761 | o |
| Lake in the Hills | Village | McHenry | 5,812 | 23,619 | 28,965 | o |
| Lake Ka-Ho | Village | Macoupin | ... | 251 | 237 | o |
| Lake of the Woods | Census-Designated Place | Champaign | ... | ... | 2,912 | o |
| Lake Petersburg | Census-Designated Place | Menard | ... | ... | 719 | o |
| Lake Summerset | Census-Designated Place | 1,296 | 2,061 | 2,048 | o | |
| Lake Villa | Village | Lake | 3,014 | 5,926 | 8,741 | o |
| Lake Zurich | Village | Lake | 15,320 | 18,509 | 19,631 | o |
| Lakemoor | Village | 1,170 | 2,841 | 6,017 | o | |
| Lakewood | Village | McHenry | 1,649 | 2,330 | 3,811 | o |
| Lakewood Shores | Census-Designated Place | Will | 1,606 | 1,487 | 1,347 | o |
| Lanark | City | Carroll | 1,438 | 1,591 | 1,457 | o |
| Langleyville | Census-Designated Place | Christian | ... | ... | 432 | o |
| Lansing | Village | Cook | 28,221 | 28,343 | 28,331 | o |
| LaPlace | Census-Designated Place | Piatt | ... | ... | 259 | o |
| LaSalle | City | La Salle | 9,538 | 9,920 | 9,609 | o |
| Latham | Village | Logan | 486 | 371 | 380 | o |
| Lawrenceville | City | Lawrence | 4,913 | 4,750 | 4,348 | o |
| Le Roy | City | McLean | 2,857 | 3,335 | 3,560 | o |
| Leaf River | Village | Ogle | 546 | 555 | 443 | o |
| Lebanon | City | St. Clair | 3,690 | 3,557 | 4,418 | o |
| Lee | Village | 319 | 311 | 337 | o | |
| Leland | Village | La Salle | 818 | 970 | 977 | o |
| Leland Grove | City | Sangamon | 1,682 | 1,587 | 1,503 | o |
| Lemont | Village | 7,875 | 13,418 | 16,000 | o | |
| Lena | Village | Stephenson | 2,661 | 2,902 | 2,912 | o |
| Lenzburg | Village | St. Clair | 530 | 577 | 521 | o |
| Leonore | Village | La Salle | 134 | 110 | 130 | o |
| Lerna | Village | Coles | 243 | 322 | 286 | o |
| Lewistown | City | Fulton | 2,627 | 2,522 | 2,384 | o |
| Lexington | City | McLean | 1,832 | 1,962 | 2,060 | o |
| Liberty | Village | Adams | 543 | 519 | 516 | o |
| Libertyville | Village | Lake | 19,952 | 20,776 | 20,315 | o |
| Lily Lake | Village | Kane | 600 | 834 | 993 | o |
| Lima | Village | Adams | ... | 169 | 163 | o |
| Limestone | Village | Kankakee | ... | 1,624 | 1,598 | o |
| Lincoln | City | Logan | 15,588 | 15,383 | 14,504 | o |
| Lincolnshire | Village | Lake | 4,934 | 6,133 | 7,275 | o |
| Lincolnwood | Village | Cook | 11,342 | 12,359 | 12,590 | o |
| Lindenhurst | Village | Lake | 8,349 | 12,620 | 14,462 | o |
| Lisbon | Village | Kendall | ... | 292 | 285 | o |
| Lisle | Village | DuPage | ... | 22,539 | 22,390 | o |
| Litchfield | City | Montgomery | 7,118 | 6,986 | 6,939 | o |
| Little York | Village | Warren | 349 | 269 | 331 | o |
| Littleton | Village | Schuyler | 181 | 197 | 181 | o |
| Liverpool | Village | Fulton | 129 | 119 | 129 | o |
| Livingston | Village | Madison | 928 | 825 | 858 | o |
| Loami | Village | Sangamon | 803 | 804 | 745 | o |
| Lockport | City | Will | 9,690 | 15,399 | 24,839 | o |
| Loda | Village | Iroquois | 390 | 419 | 407 | o |
| Lomax | Village | Henderson | 473 | 477 | 454 | o |
| Lombard | Village | DuPage | 40,113 | 42,594 | 43,165 | o |
| London Mills | Village | 485 | 447 | 392 | o | |
| Long Creek | Village | Macon | 1,217 | 1,404 | 1,328 | o |
| Long Grove | Village | Lake | 4,481 | 6,740 | 8,043 | o |
| Long Lake | Census-Designated Place | Lake | ... | 3,356 | 3,515 | o |
| Long Point | Village | Livingston | 212 | 247 | 226 | o |
| Longview | Village | Champaign | 169 | 153 | 153 | o |
| Loraine | Village | Adams | 332 | 363 | 313 | o |
| Lost Nation | Census-Designated Place | Ogle | ... | ... | 708 | o |
| Lostant | Village | La Salle | 508 | 486 | 498 | o |
| Louisville | Village | Clay | 1,115 | 1,280 | 1,139 | o |
| Loves Park | City | 15,837 | 20,213 | 23,996 | o | |
| Lovington | Village | Moultrie | 1,145 | 1,222 | 1,130 | o |
| Ludlow | Village | Champaign | ... | 373 | 371 | o |
| Lyndon | Village | Whiteside | 603 | 566 | 648 | o |
| Lynnville | Village | Morgan | 112 | 137 | 117 | o |
| Lynwood | Village | Cook | ... | 7,974 | 9,007 | o |
| Lyons | Village | Cook | 9,843 | 10,255 | 10,729 | o |
| Macedonia | Village | 58 | 51 | 63 | o | |
| Machesney Park | Village | Winnebago | 18,921 | 20,768 | 23,499 | o |
| Mackinaw | Village | Tazewell | ... | 1,576 | 1,950 | o |
| Macomb | City | McDonough | 20,158 | 18,462 | 19,288 | o |
| Macon | City | Macon | 1,323 | 1,213 | 1,138 | o |
| Madison | City | 5,104 | 4,545 | 3,891 | o | |
| Maeystown | Village | Monroe | 112 | 146 | 157 | o |
| Magnolia | Village | Putnam | 261 | 279 | 260 | o |
| Mahomet | Village | Champaign | 3,499 | 4,996 | 7,258 | o |
| Makanda | Village | Jackson | 327 | 421 | 561 | o |
| Malden | Village | Bureau | 373 | 343 | 362 | o |
| Malta | Village | DeKalb | 897 | 974 | 1,164 | o |
| Manchester | Village | Scott | 347 | 352 | 292 | o |
| Manhattan | Village | Will | 2,166 | 3,378 | 7,051 | o |
| Manito | Village | Mason | 1,709 | 1,735 | 1,642 | o |
| Manlius | Village | Bureau | 366 | 355 | 359 | o |
| Mansfield | Village | Piatt | 947 | 949 | 906 | o |
| Manteno | Village | Kankakee | 3,798 | 6,477 | 9,204 | o |
| Maple Park | Village | 639 | 771 | 1,310 | o | |
| Mapleton | Village | Peoria | ... | 246 | 270 | o |
| Maquon | Village | Knox | 333 | 318 | 284 | o |
| Marengo | City | McHenry | 4,811 | 6,405 | 7,648 | o |
| Marietta | Village | Fulton | 142 | 150 | 112 | o |
| Marine | Village | Madison | 972 | 918 | 960 | o |
| Marion | City | Williamson | 14,788 | 16,196 | 17,193 | o |
| Marissa | Village | St. Clair | 2,369 | 2,141 | 1,979 | o |
| Mark | Village | Putnam | 400 | 502 | 555 | o |
| Markham | City | Cook | 12,978 | 12,741 | 12,508 | o |
| Maroa | City | Macon | 1,594 | 1,685 | 1,801 | o |
| Marquette Heights | City | Tazewell | 3,105 | 2,794 | 2,824 | o |
| Marseilles | City | La Salle | 4,833 | 4,661 | 5,094 | o |
| Marshall | City | Clark | ... | 3,920 | 3,933 | o |
| Martinsville | City | Clark | 1,205 | 1,225 | 1,167 | o |
| Martinton | Village | Iroquois | 302 | 375 | 381 | o |
| Maryville | Village | Madison | ... | 4,869 | 7,487 | o |
| Mascoutah | City | St. Clair | 5,710 | 5,771 | 7,483 | o |
| Mason | Town | Effingham | 387 | 402 | 345 | o |
| Mason City | City | Mason | 2,445 | 2,562 | 2,343 | o |
| Matherville | Village | Mercer | 703 | 772 | 723 | o |
| Matteson | Village | 11,635 | 12,952 | 19,009 | o | |
| Mattoon | City | Coles | 18,565 | 18,296 | 18,555 | o |
| Maunie | Village | White | 155 | 177 | 139 | o |
| Maywood | Village | Cook | 27,147 | 26,980 | 24,090 | o |
| Mazon | Village | Grundy | 750 | 904 | 1,015 | o |
| McClure | Village | Alexander | ... | 427 | 402 | o |
| McCook | Village | Cook | 277 | 254 | 228 | o |
| McCullom Lake | Village | McHenry | 1,033 | 1,038 | 1,049 | o |
| McHenry | City | McHenry | 16,646 | 21,716 | 26,992 | o |
| McLean | Village | McLean | 819 | 808 | 830 | o |
| McLeansboro | City | Hamilton | 2,764 | 2,949 | 2,883 | o |
| McNabb | Village | Putnam | 314 | 310 | 285 | o |
| Mechanicsburg | Village | Sangamon | ... | 476 | 590 | o |
| Media | Village | Henderson | 146 | 130 | 107 | o |
| Medora | Village | Macoupin | 420 | 501 | 419 | o |
| Melrose Park | Village | Cook | 20,922 | 23,188 | 25,411 | o |
| Melvin | Village | Ford | 465 | 465 | 452 | o |
| Mendon | Village | Adams | ... | 1,027 | 953 | o |
| Mendota | City | La Salle | 7,035 | 7,292 | 7,372 | o |
| Menominee | Village | Jo Daviess | ... | 217 | 248 | o |
| Meredosia | Village | Morgan | 1,157 | 1,041 | 1,044 | o |
| Merrionette Park | Village | Cook | 2,084 | 1,999 | 1,900 | o |
| Metamora | Village | Woodford | 2,545 | 2,733 | 3,636 | o |
| Metcalf | Village | Edgar | 227 | 213 | 189 | o |
| Metropolis | City | Massac | 7,169 | 6,593 | 6,537 | o |
| Mettawa | Village | Lake | 392 | 367 | 547 | o |
| Middletown | Village | Logan | 438 | 434 | 324 | o |
| Midlothian | Village | Cook | 14,352 | 14,335 | 14,819 | o |
| Milan | Village | Rock Island | 5,654 | 5,376 | 5,099 | o |
| Milford | Village | Iroquois | 1,550 | 1,374 | 1,306 | o |
| Mill Creek | Village | Union | 87 | 76 | 65 | o |
| Mill Shoals | Village | 247 | 235 | 215 | o | |
| Millbrook | Village | Kendall | ... | 311 | 335 | o |
| Milledgeville | Village | Carroll | 1,085 | 1,014 | 1,032 | o |
| Millington | Village | ... | 478 | 665 | o | |
| Millstadt | Village | St. Clair | ... | 2,946 | 4,011 | o |
| Milton | Village | Pike | 270 | 274 | 271 | o |
| Mineral | Village | Bureau | 250 | 272 | 237 | o |
| Minier | Village | Tazewell | 1,155 | 1,244 | 1,252 | o |
| Minonk | City | Woodford | 2,059 | 2,174 | 2,078 | o |
| Minooka | Village | 2,605 | 4,059 | 10,924 | o | |
| Mitchell | Census-Designated Place | Madison | ... | ... | 1,356 | o |
| Modesto | Village | Macoupin | 240 | 252 | 189 | o |
| Mokena | Village | Will | 6,958 | 14,645 | 18,740 | o |
| Moline | City | Rock Island | 44,046 | 44,047 | 43,483 | o |
| Momence | City | Kankakee | 2,943 | 3,162 | 3,310 | o |
| Monee | Village | Will | 1,132 | 2,967 | 5,148 | o |
| Monmouth | City | Warren | 9,549 | 9,846 | 9,444 | o |
| Monroe Center | Village | Ogle | ... | 494 | 471 | o |
| Montgomery | Village | 4,614 | 5,576 | 18,438 | o | |
| Monticello | City | Piatt | 4,775 | 5,139 | 5,548 | o |
| Montrose | Village | 306 | 260 | 201 | o | |
| Morris | City | Grundy | 10,306 | 11,994 | 13,636 | o |
| Morrison | City | Whiteside | 4,557 | 4,484 | 4,188 | o |
| Morrisonville | Village | Christian | 1,113 | 1,068 | 1,056 | o |
| Morton | Village | Tazewell | 13,994 | 15,442 | 16,267 | o |
| Morton Grove | Village | Cook | 22,260 | 22,445 | 23,270 | o |
| Mound City | City | Pulaski | 763 | 692 | 588 | o |
| Mound Station | Village | Brown | 147 | 127 | 122 | o |
| Mounds | City | Pulaski | 1,410 | 1,117 | 810 | o |
| Mount Auburn | Village | Christian | 544 | 515 | 480 | o |
| Mount Carmel | City | Wabash | 8,362 | 8,009 | 7,284 | o |
| Mount Carroll | City | Carroll | 1,768 | 1,836 | 1,717 | o |
| Mount Clare | Village | Macoupin | 296 | 433 | 278 | o |
| Mount Erie | Village | Wayne | 137 | 105 | 88 | o |
| Mount Morris | Village | Ogle | 2,953 | 3,043 | 2,998 | o |
| Mount Olive | City | Macoupin | 2,154 | 2,172 | 2,099 | o |
| Mount Prospect | Village | Cook | 53,081 | 56,271 | 54,167 | o |
| Mount Pulaski | City | Logan | 1,611 | 1,701 | 1,566 | o |
| Mount Sterling | City | Brown | 1,994 | 2,071 | 2,025 | o |
| Mount Vernon | City | Jefferson | 17,868 | 16,358 | 15,277 | o |
| Mount Zion | Village | Macon | 4,520 | 4,875 | 5,833 | o |
| Moweaqua | Village | 1,792 | 1,944 | 1,831 | o | |
| Muddy | Village | Saline | 87 | 79 | 68 | o |
| Mulberry Grove | Village | Bond | 658 | 672 | 634 | o |
| Mulkeytown | Census-Designated Place | Franklin | ... | ... | 175 | o |
| Muncie | Village | Vermilion | 182 | 155 | 146 | o |
| Mundelein | Village | Lake | 21,340 | 30,999 | 31,064 | o |
| Murphysboro | City | Jackson | ... | 8,715 | 7,970 | o |
| Murrayville | Village | Morgan | 675 | 644 | 587 | o |
| Naperville | City | 86,958 | 128,517 | 141,853 | o | |
| Naplate | Village | La Salle | 609 | 523 | 496 | o |
| Naples | Town | Scott | 130 | 131 | 130 | o |
| Nashville | City | Washington | 3,102 | 3,147 | 3,258 | o |
| Nason | City | Jefferson | 235 | 234 | 236 | o |
| Nauvoo | City | Hancock | 1,100 | 1,081 | 1,149 | o |
| Nebo | Village | Pike | 399 | 408 | 340 | o |
| Nelson | Village | Lee | 174 | 163 | 170 | o |
| Neoga | City | Cumberland | 1,697 | 1,854 | 1,636 | o |
| Neponset | Village | Bureau | 535 | 519 | 473 | o |
| New Athens | Village | St. Clair | 2,008 | 1,981 | 2,054 | o |
| New Baden | Village | 2,770 | 3,014 | 3,349 | o | |
| New Bedford | Village | Bureau | 99 | 95 | 75 | o |
| New Berlin | Village | Sangamon | 785 | 1,032 | 1,346 | o |
| New Boston | City | Mercer | 620 | 632 | 683 | o |
| New Burnside | Village | Johnson | 253 | 242 | 211 | o |
| New Canton | Town | Pike | 405 | 417 | 359 | o |
| New Douglas | Village | Madison | ... | 329 | 319 | o |
| New Grand Chain | Village | Pulaski | 273 | 233 | 210 | o |
| New Haven | Village | Gallatin | 459 | 479 | 433 | o |
| New Holland | Village | Logan | 321 | 317 | 269 | o |
| New Lenox | Village | Will | 10,079 | 18,124 | 24,394 | o |
| New Milford | Village | Winnebago | 541 | 541 | 697 | o |
| New Minden | Village | Washington | 177 | 204 | 215 | o |
| New Salem | Village | Pike | 147 | 136 | 137 | o |
| Newark | Village | Kendall | 840 | 887 | 992 | o |
| Newman | City | Douglas | 960 | 956 | 865 | o |
| Newton | City | Jasper | 3,226 | 3,069 | 2,849 | o |
| Niantic | Village | Macon | 647 | 738 | 707 | o |
| Niles | Village | Cook | 28,794 | 30,068 | 29,803 | o |
| Nilwood | Town | Macoupin | 238 | 284 | 239 | o |
| Noble | Village | Richland | 756 | 746 | 677 | o |
| Nokomis | City | Montgomery | 2,587 | 2,389 | 2,256 | o |
| Nora | Village | Jo Daviess | 164 | 118 | 121 | o |
| Normal | Town | McLean | 40,134 | 45,476 | 52,497 | o |
| Norridge | Village | Cook | 14,464 | 14,582 | 14,572 | o |
| Norris | Village | Fulton | 207 | 193 | 213 | o |
| Norris City | Village | White | 1,342 | 1,061 | 1,275 | o |
| North Aurora | Village | Kane | 6,254 | 10,700 | 16,760 | o |
| North Barrington | Village | Lake | 2,068 | 2,938 | 3,047 | o |
| North Chicago | City | Lake | 35,989 | 35,919 | 32,574 | o |
| North City | Village | Franklin | 575 | 630 | 608 | o |
| North Henderson | Village | Mercer | 184 | 187 | 187 | o |
| North Pekin | Village | Tazewell | 1,514 | 1,603 | 1,573 | o |
| North Riverside | Village | Cook | 6,253 | 6,688 | 6,672 | o |
| North Utica | Village | La Salle | 848 | 974 | 1,352 | o |
| Northbrook | Village | Cook | 32,743 | 33,525 | 33,170 | o |
| Northfield | Village | Cook | ... | 5,560 | 5,420 | o |
| Northlake | City | Cook | 12,342 | 11,895 | 12,323 | o |
| Norwood | Village | Peoria | 482 | 473 | 478 | o |
| O'Fallon | City | St. Clair | 16,550 | 22,151 | 28,281 | o |
| Oak Brook | Village | 9,382 | 8,632 | 7,883 | o | |
| Oak Forest | City | Cook | 27,109 | 28,193 | 27,962 | o |
| Oak Grove | Village | Rock Island | ... | 728 | 396 | o |
| Oak Lawn | Village | Cook | 56,316 | 55,245 | 56,690 | o |
| Oak Park | Village | Cook | 53,610 | 52,524 | 51,878 | o |
| Oak Run | Census-Designated Place | Knox | ... | ... | 547 | o |
| Oakbrook Terrace | City | DuPage | 2,186 | 2,273 | 2,134 | o |
| Oakdale | Village | Washington | 226 | 213 | 221 | o |
| Oakford | Village | Menard | 246 | 309 | 286 | o |
| Oakland | City | Coles | 1,040 | 996 | 880 | o |
| Oakwood | Village | Vermilion | 1,544 | 1,502 | 1,595 | o |
| Oakwood Hills | Village | McHenry | 1,657 | 2,198 | 2,083 | o |
| Oblong | Village | Crawford | 1,740 | 1,580 | 1,466 | o |
| Oconee | Village | Shelby | 201 | 202 | 180 | o |
| Odell | Village | Livingston | 1,028 | 1,014 | 1,046 | o |
| Odin | Village | Marion | 1,150 | 1,122 | 1,076 | o |
| Ogden | Village | Champaign | 685 | 747 | 810 | o |
| Oglesby | City | La Salle | 3,644 | 3,647 | 3,791 | o |
| Ohio | Village | Bureau | 502 | 540 | 513 | o |
| Ohlman | Village | Montgomery | ... | 75 | 135 | o |
| Okawville | Village | Washington | 1,274 | 1,355 | 1,434 | o |
| Old Mill Creek | Village | Lake | 198 | 251 | 178 | o |
| Old Ripley | Village | Bond | 95 | 127 | 108 | o |
| Old Shawneetown | Village | Gallatin | 363 | 278 | 193 | o |
| Olive Branch | Census-Designated Place | Alexander | ... | ... | 864 | o |
| Olivet | Census-Designated Place | Vermilion | ... | ... | 428 | o |
| Olmsted | Village | Pulaski | ... | 336 | 333 | o |
| Olney | City | Richland | 9,649 | 8,799 | 9,115 | o |
| Olympia Fields | Village | Cook | 4,252 | 4,732 | 4,988 | o |
| Omaha | Village | Gallatin | 273 | 263 | 266 | o |
| Onarga | Village | Iroquois | 1,301 | 1,438 | 1,368 | o |
| Oneida | City | Knox | 723 | 752 | 700 | o |
| Opdyke | Census-Designated Place | Jefferson | ... | ... | 254 | o |
| Oquawka | Village | Henderson | 1,442 | 1,539 | 1,371 | o |
| Orangeville | Village | Stephenson | 583 | 751 | 793 | o |
| Oreana | Village | Macon | 847 | 892 | 875 | o |
| Oregon | City | Ogle | 3,968 | 4,064 | 3,721 | o |
| Orient | City | Franklin | 427 | 305 | 358 | o |
| Orion | Village | Henry | 1,815 | 1,714 | 1,861 | o |
| Orland Hills | Village | Cook | 5,458 | 6,781 | 7,149 | o |
| Orland Park | Village | 37,885 | 51,170 | 56,767 | o | |
| Oswego | Village | Kendall | 4,224 | 13,477 | 30,355 | o |
| Ottawa | City | La Salle | 17,770 | 18,566 | 18,768 | o |
| Otterville | Town | Jersey | 115 | 120 | 126 | o |
| Owaneco | Village | Christian | 260 | 256 | 239 | o |
| Paderborn | Census-Designated Place | St. Clair | ... | ... | 43 | o |
| Palatine | Village | Cook | 49,791 | 66,276 | 68,557 | o |
| Palestine | Village | Crawford | 1,649 | 1,376 | 1,369 | o |
| Palmer | Village | Christian | 275 | 248 | 229 | o |
| Palmyra | Village | Macoupin | 722 | 733 | 698 | o |
| Palos Heights | City | Cook | 11,424 | 11,261 | 12,515 | o |
| Palos Hills | City | Cook | 17,780 | 17,665 | 17,484 | o |
| Palos Park | Village | Cook | ... | 4,838 | 4,847 | o |
| Pana | City | Christian | ... | 5,950 | 5,847 | o |
| Panama | Village | 333 | 323 | 343 | o | |
| Panola | Village | Woodford | 25 | 33 | 45 | o |
| Papineau | Village | Iroquois | 142 | 196 | 171 | o |
| Paris | City | Edgar | 9,247 | 9,229 | 8,837 | o |
| Park City | City | Lake | 4,999 | 6,644 | 7,570 | o |
| Park Forest | Village | 24,695 | 23,476 | 21,975 | o | |
| Park Ridge | City | Cook | 37,360 | 37,801 | 37,480 | o |
| Parkersburg | Village | Richland | 214 | 234 | 199 | o |
| Patoka | Village | Marion | 666 | 633 | 584 | o |
| Paw Paw | Village | Lee | 805 | 852 | 870 | o |
| Pawnee | Village | Sangamon | 2,379 | 2,647 | 2,739 | o |
| Paxton | City | Ford | 4,323 | 4,599 | 4,473 | o |
| Payson | Village | Adams | 1,114 | 1,066 | 1,026 | o |
| Pearl | Village | Pike | 177 | 187 | 138 | o |
| Pearl City | Village | Stephenson | 682 | 785 | 838 | o |
| Pecatonica | Village | Winnebago | 1,765 | 1,997 | 2,195 | o |
| Pekin | City | 32,228 | 33,942 | 34,094 | o | |
| Penfield | Census-Designated Place | Champaign | ... | ... | 193 | o |
| Peoria | City | Peoria | 113,822 | 113,148 | 115,007 | o |
| Peoria Heights | Village | 6,829 | 6,629 | 6,156 | o | |
| Peotone | Village | Will | 3,072 | 3,394 | 4,142 | o |
| Percy | Village | Randolph | 910 | 966 | 970 | o |
| Perry | Village | Pike | 487 | 437 | 397 | o |
| Peru | City | La Salle | 9,780 | 9,865 | 10,295 | o |
| Pesotum | Village | Champaign | 575 | 521 | 551 | o |
| Petersburg | City | Menard | 2,280 | 2,298 | 2,260 | o |
| Phillipstown | Village | White | 48 | 28 | 44 | o |
| Philo | Village | Champaign | 1,028 | 1,314 | 1,466 | o |
| Phoenix | Village | Cook | 2,220 | 2,157 | 1,964 | o |
| Pierron | Village | 554 | 649 | 600 | o | |
| Pinckneyville | City | Perry | 3,641 | 5,490 | 5,648 | o |
| Pingree Grove | Village | Kane | ... | 186 | 4,532 | o |
| Piper City | Village | Ford | 760 | 781 | 826 | o |
| Pistakee Highlands | Census-Designated Place | McHenry | ... | ... | 3,454 | o |
| Pittsburg | Village | Williamson | 602 | 573 | 572 | o |
| Pittsfield | City | Pike | ... | 4,638 | 4,576 | o |
| Plainfield | Village | Will | 5,254 | 13,295 | 39,581 | o |
| Plainville | Village | Adams | 263 | 248 | 264 | o |
| Plano | City | Kendall | 5,137 | 5,741 | 10,856 | o |
| Plattville | Village | Kendall | ... | 221 | 242 | o |
| Pleasant Hill | Village | Pike | 1,047 | 1,047 | 966 | o |
| Pleasant Plains | Village | Sangamon | 760 | 777 | 802 | o |
| Plymouth | Village | 511 | 562 | 505 | o | |
| Pocahontas | Village | Bond | 837 | 732 | 784 | o |
| Polo | City | Ogle | 2,513 | 2,477 | 2,355 | o |
| Pontiac | City | Livingston | 11,612 | 11,970 | 11,931 | o |
| Pontoon Beach | Village | Madison | 4,562 | 5,735 | 5,836 | o |
| Pontoosuc | Village | Hancock | 206 | 171 | 146 | o |
| Poplar Grove | Village | Boone | ... | 1,846 | 5,023 | o |
| Port Barrington | Village | ... | 836 | 1,517 | o | |
| Port Byron | Village | Rock Island | 1,173 | 1,540 | 1,647 | o |
| Posen | Village | Cook | 4,220 | 4,730 | 5,987 | o |
| Potomac | Village | Vermilion | 753 | 681 | 750 | o |
| Prairie City | Village | McDonough | 503 | 461 | 379 | o |
| Prairie du Rocher | Village | Randolph | 592 | 613 | 604 | o |
| Prairie Grove | Village | McHenry | ... | 1,003 | 1,904 | o |
| Prestbury | Census-Designated Place | Kane | ... | ... | 1,722 | o |
| Preston Heights | Census-Designated Place | Will | ... | ... | 2,575 | o |
| Princeton | City | Bureau | 7,491 | 7,509 | 7,660 | o |
| Princeville | Village | Peoria | 1,423 | 1,666 | 1,738 | o |
| Prophetstown | City | Whiteside | 1,889 | 2,023 | 2,080 | o |
| Prospect Heights | City | Cook | 15,543 | 17,061 | 16,256 | o |
| Pulaski | Village | Pulaski | 361 | 278 | 206 | o |
| Quincy | City | Adams | 40,523 | 40,745 | 40,633 | o |
| Radom | Village | Washington | 172 | 395 | 220 | o |
| Raleigh | Village | Saline | 322 | 330 | 350 | o |
| Ramsey | Village | Fayette | 980 | 1,056 | 1,037 | o |
| Rankin | Village | Vermilion | 619 | 617 | 561 | o |
| Ransom | Village | La Salle | 435 | 409 | 384 | o |
| Rantoul | Village | Champaign | 17,256 | 12,922 | 12,941 | o |
| Rapids City | Village | Rock Island | 896 | 955 | 959 | o |
| Raritan | Village | Henderson | 146 | 140 | 138 | o |
| Raymond | Village | Montgomery | 842 | 927 | 1,006 | o |
| Red Bud | City | Randolph | 3,102 | 3,430 | 3,698 | o |
| Reddick | Village | ... | 226 | 163 | o | |
| Redmon | Village | Edgar | 201 | 199 | 173 | o |
| Rentchler | Census-Designated Place | St. Clair | ... | ... | 34 | o |
| Reynolds | Village | 582 | 508 | 539 | o | |
| Richmond | Village | McHenry | ... | 1,164 | 1,874 | o |
| Richton Park | Village | Cook | 10,520 | 12,546 | 13,646 | o |
| Richview | Village | Washington | 327 | 308 | 253 | o |
| Ridge Farm | Village | Vermilion | 939 | 912 | 882 | o |
| Ridgway | Village | Gallatin | 1,111 | 928 | 869 | o |
| Ridott | Village | Stephenson | 156 | 159 | 164 | o |
| Ringwood | Village | McHenry | ... | 528 | 836 | o |
| Rio | Village | Knox | 260 | 240 | 220 | o |
| Ripley | Village | Brown | 75 | 103 | 86 | o |
| River Forest | Village | Cook | 11,680 | 11,635 | 11,172 | o |
| River Grove | Village | Cook | 9,951 | 10,668 | 10,227 | o |
| Riverdale | Village | Cook | 13,498 | 15,055 | 13,549 | o |
| Riverside | Village | Cook | 8,802 | 8,895 | 8,875 | o |
| Riverton | Village | Sangamon | 2,735 | 3,093 | 3,455 | o |
| Riverwoods | Village | Lake | 3,098 | 3,843 | 3,660 | o |
| Roanoke | Village | Woodford | 1,910 | 1,994 | 2,065 | o |
| Robbins | Village | Cook | 7,535 | 6,635 | 5,337 | o |
| Roberts | Village | Ford | 400 | 387 | 362 | o |
| Robinson | City | Crawford | 7,040 | 6,822 | 7,713 | o |
| Rochelle | City | Ogle | 8,777 | 9,677 | 9,574 | o |
| Rochester | Village | Sangamon | 2,778 | 2,891 | 3,689 | o |
| Rock City | Village | Stephenson | 282 | 313 | 315 | o |
| Rock Falls | City | Whiteside | 9,678 | 9,606 | 9,266 | o |
| Rock Island | City | Rock Island | 40,537 | 39,735 | 39,018 | o |
| Rock Island Arsenal | Census-Designated Place | Rock Island | ... | 145 | 149 | o |
| Rockbridge | Village | Greene | 180 | 189 | 169 | o |
| Rockdale | Village | Will | 1,709 | 1,883 | 1,976 | o |
| Rockford | City | Winnebago | 143,942 | 151,815 | 152,871 | o |
| Rockton | Village | Winnebago | ... | 5,461 | 7,685 | o |
| Rockwood | Village | Randolph | 46 | 42 | 42 | o |
| Rolling Meadows | City | Cook | 22,757 | 24,665 | 24,099 | o |
| Rome | Census-Designated Place | Peoria | ... | 1,776 | 1,738 | o |
| Romeoville | Village | Will | 14,451 | 21,234 | 39,680 | o |
| Roodhouse | City | Greene | 2,137 | 2,214 | 1,814 | o |
| Roscoe | Village | Winnebago | 2,220 | 6,259 | 10,785 | o |
| Rose Hill | Village | Jasper | 78 | 79 | 80 | o |
| Roselle | Village | 20,929 | 23,287 | 22,763 | o | |
| Rosemont | Village | Cook | 3,981 | 4,224 | 4,202 | o |
| Roseville | Village | Warren | 1,151 | 1,083 | 989 | o |
| Rosewood Heights | Census-Designated Place | Madison | ... | ... | 4,038 | o |
| Rosiclare | City | Hardin | 1,378 | 1,224 | 1,160 | o |
| Rossville | Village | Vermilion | 1,337 | 1,213 | 1,331 | o |
| Round Lake | Village | Lake | 3,651 | 5,882 | 18,289 | o |
| Round Lake Beach | Village | Lake | 16,441 | 25,874 | 28,175 | o |
| Round Lake Heights | Village | Lake | 1,257 | 1,337 | 2,676 | o |
| Round Lake Park | Village | Lake | 4,124 | 6,044 | 7,505 | o |
| Roxana | Village | Madison | ... | 1,611 | 1,542 | o |
| Royal | Village | Champaign | 223 | 273 | 293 | o |
| Royal Lakes | Village | Macoupin | 272 | 190 | 197 | o |
| Royalton | Village | Franklin | 1,186 | 1,130 | 1,151 | o |
| Ruma | Village | Randolph | ... | 281 | 317 | o |
| Rushville | City | Schuyler | 3,266 | 3,219 | 3,192 | o |
| Russellville | Village | Lawrence | 133 | 119 | 94 | o |
| Rutland | Village | La Salle | 396 | 354 | 318 | o |
| Sadorus | Village | Champaign | 469 | 427 | 416 | o |
| Sailor Springs | Village | Clay | 136 | 128 | 95 | o |
| Salem | City | Marion | 7,669 | 7,904 | 7,485 | o |
| Sammons Point | Village | Kankakee | ... | 319 | 279 | o |
| San Jose | Village | 666 | 695 | 642 | o | |
| Sandoval | Village | Marion | 1,649 | 1,434 | 1,274 | o |
| Sandwich | City | 5,633 | 6,552 | 7,421 | o | |
| Sauget | Village | St. Clair | 197 | 249 | 159 | o |
| Sauk Village | Village | 10,783 | 10,411 | 10,506 | o | |
| Saunemin | Village | Livingston | 402 | 452 | 420 | o |
| Savanna | City | Carroll | 3,866 | 3,557 | 3,062 | o |
| Savoy | Village | Champaign | 2,805 | 4,488 | 7,280 | o |
| Sawyerville | Village | Macoupin | 284 | 295 | 279 | o |
| Saybrook | Village | McLean | 774 | 764 | 693 | o |
| Scales Mound | Village | Jo Daviess | 388 | 401 | 376 | o |
| Schaumburg | Village | 68,678 | 75,394 | 74,227 | o | |
| Schiller Park | Village | Cook | 11,193 | 11,777 | 11,793 | o |
| Schram City | Village | Montgomery | 716 | 653 | 586 | o |
| Sciota | Village | McDonough | 68 | 58 | 61 | o |
| Scott AFB | Census-Designated Place | St. Clair | ... | ... | 3,612 | o |
| Scottville | Village | Macoupin | 165 | 140 | 116 | o |
| Seaton | Village | Mercer | 221 | 242 | 222 | o |
| Seatonville | Village | Bureau | 259 | 303 | 314 | o |
| Secor | Village | Woodford | 391 | 379 | 373 | o |
| Seneca | Village | 1,935 | 2,053 | 2,371 | o | |
| Sesser | City | Franklin | 2,096 | 2,124 | 1,931 | o |
| Seymour | Census-Designated Place | Champaign | ... | ... | 303 | o |
| Shabbona | Village | DeKalb | 882 | 929 | 925 | o |
| Shannon | Village | Carroll | 951 | 854 | 757 | o |
| Shawneetown | City | Gallatin | 1,577 | 1,410 | 1,239 | o |
| Sheffield | Village | Bureau | 970 | 946 | 926 | o |
| Shelbyville | City | Shelby | 4,791 | 4,975 | 4,700 | o |
| Sheldon | Village | Iroquois | 1,088 | 1,232 | 1,070 | o |
| Sheridan | Village | La Salle | 1,812 | 2,411 | 2,137 | o |
| Sherman | Village | Sangamon | 2,027 | 2,883 | 4,148 | o |
| Sherrard | Village | Mercer | ... | 729 | 640 | o |
| Shiloh | Village | St. Clair | ... | 8,622 | 12,651 | o |
| Shipman | Town | Macoupin | 642 | 655 | 624 | o |
| Shorewood | Village | Will | ... | 8,017 | 15,615 | o |
| Shumway | Village | Effingham | ... | 230 | 202 | o |
| Sibley | Village | Ford | 356 | 329 | 272 | o |
| Sidell | Village | Vermilion | 584 | 626 | 617 | o |
| Sidney | Village | Champaign | 1,049 | 1,070 | 1,233 | o |
| Sigel | Town | Shelby | 344 | 386 | 373 | o |
| Silvis | City | Rock Island | 6,892 | 7,279 | 7,479 | o |
| Simpson | Village | Johnson | 82 | 54 | 60 | o |
| Sims | Village | Wayne | 338 | 273 | 252 | o |
| Skokie | Village | Cook | 59,431 | 63,354 | 64,784 | o |
| Sleepy Hollow | Village | Kane | 3,231 | 3,561 | 3,304 | o |
| Smithboro | Village | Bond | 201 | 200 | 177 | o |
| Smithfield | Village | Fulton | 277 | 214 | 230 | o |
| Smithton | Village | St. Clair | ... | 2,365 | 3,693 | o |
| Somonauk | Village | ... | 1,430 | 1,893 | o | |
| Sorento | Village | Bond | 596 | 601 | 498 | o |
| South Barrington | Village | Cook | 3,159 | 3,768 | 4,565 | o |
| South Beloit | City | Winnebago | 4,096 | 5,431 | 7,892 | o |
| South Chicago Heights | Village | Cook | 3,631 | 3,970 | 4,139 | o |
| South Elgin | Village | Kane | 7,599 | 16,164 | 21,985 | o |
| South Holland | Village | Cook | 22,073 | 22,239 | 22,030 | o |
| South Jacksonville | Village | Morgan | 3,371 | 3,475 | 3,331 | o |
| South Pekin | Village | Tazewell | 1,184 | 1,162 | 1,146 | o |
| South Roxana | Village | Madison | 1,954 | 1,888 | 2,053 | o |
| South Wilmington | Village | Grundy | 696 | 621 | 681 | o |
| Southern View | Village | Sangamon | ... | 1,794 | 1,642 | o |
| Sparland | Village | Marshall | 414 | 504 | 406 | o |
| Sparta | City | Randolph | 4,902 | 4,581 | 4,302 | o |
| Spaulding | Village | Sangamon | 338 | 573 | 873 | o |
| Spillertown | Village | Williamson | 249 | 219 | 203 | o |
| Spring Bay | Village | Woodford | 435 | 436 | 452 | o |
| Spring Grove | Village | McHenry | 1,195 | 3,944 | 5,778 | o |
| Spring Valley | City | Bureau | 5,235 | 5,448 | 5,558 | o |
| Springerton | Village | White | 164 | 134 | 110 | o |
| Springfield | City | Sangamon | 107,265 | 112,096 | 116,250 | o |
| St. Anne | Village | Kankakee | 1,143 | 1,215 | 1,257 | o |
| St. Augustine | Village | Knox | 157 | 152 | 120 | o |
| St. Charles | City | 23,019 | 27,979 | 32,974 | o | |
| St. David | Village | Fulton | 605 | 587 | 589 | o |
| St. Elmo | City | Fayette | 1,470 | 1,456 | 1,426 | o |
| St. Francisville | City | Lawrence | 851 | 759 | 697 | o |
| St. Jacob | Village | Madison | ... | 961 | 1,098 | o |
| St. Johns | Village | Perry | 218 | 218 | 219 | o |
| St. Joseph | Village | Champaign | 2,051 | 2,965 | 3,967 | o |
| St. Libory | Village | St. Clair | 531 | 583 | 615 | o |
| St. Peter | Village | Fayette | 353 | 386 | 359 | o |
| Standard | Village | Putnam | 260 | 258 | 220 | o |
| Standard City | Village | Macoupin | 128 | 138 | 152 | o |
| Stanford | Village | McLean | ... | 694 | 596 | o |
| Staunton | City | Macoupin | 4,836 | 5,142 | 5,139 | o |
| Ste. Marie | Village | Jasper | 281 | 261 | 244 | o |
| Steeleville | Village | Randolph | 2,075 | 2,079 | 2,083 | o |
| Steger | Village | 9,398 | 9,679 | 9,570 | o | |
| Sterling | City | Whiteside | 15,342 | 15,814 | 15,370 | o |
| Steward | Village | Lee | 277 | 271 | 256 | o |
| Stewardson | Village | Shelby | 660 | 747 | 734 | o |
| Stickney | Village | Cook | 5,678 | 6,148 | 6,786 | o |
| Stillman Valley | Village | Ogle | 850 | 1,048 | 1,120 | o |
| Stockton | Village | Jo Daviess | 1,904 | 1,944 | 1,862 | o |
| Stone Park | Village | Cook | 4,383 | 5,127 | 4,946 | o |
| Stonefort | Village | 359 | 292 | 297 | o | |
| Stonington | Village | Christian | 1,011 | 960 | 932 | o |
| Stoy | Village | Crawford | 135 | 119 | 104 | o |
| Strasburg | Village | Shelby | 473 | 603 | 467 | o |
| Strawn | Village | Livingston | 132 | 104 | 100 | o |
| Streamwood | Village | Cook | 31,461 | 36,430 | 39,858 | o |
| Streator | City | 14,669 | 14,191 | 13,710 | o | |
| Stronghurst | Village | Henderson | 799 | 896 | 883 | o |
| Sublette | Village | Lee | 397 | 456 | 449 | o |
| Sugar Grove | Village | Kane | 2,123 | 4,001 | 8,997 | o |
| Sullivan | City | Moultrie | 4,367 | 4,355 | 4,440 | o |
| Summerfield | Village | St. Clair | 508 | 467 | 451 | o |
| Summit | Village | Cook | 9,986 | 10,637 | 11,054 | o |
| Sumner | City | Lawrence | 1,095 | 1,022 | 3,174 | o |
| Sun River Terrace | Village | Kankakee | ... | 446 | 528 | o |
| Swansea | Village | St. Clair | ... | 10,928 | 13,430 | o |
| Sycamore | City | DeKalb | 10,005 | 12,365 | 17,519 | o |
| Symerton | Village | Will | 110 | 106 | 87 | o |
| Table Grove | Village | Fulton | 430 | 396 | 416 | o |
| Tallula | Village | Menard | 624 | 638 | 488 | o |
| Tamaroa | Village | Perry | 782 | 740 | 638 | o |
| Tamms | Village | Alexander | ... | 1,192 | 632 | o |
| Tampico | Village | Whiteside | 835 | 772 | 790 | o |
| Taylor Springs | Village | Montgomery | 676 | 583 | 690 | o |
| Taylorville | City | Christian | ... | 12,661 | 11,246 | o |
| Tennessee | Village | McDonough | 127 | 144 | 115 | o |
| Teutopolis | Village | Effingham | 1,585 | 1,560 | 1,530 | o |
| Thawville | Village | Iroquois | 241 | 258 | 241 | o |
| Thayer | Village | Sangamon | 730 | 750 | 693 | o |
| The Galena Territory | Census-Designated Place | Jo Daviess | ... | ... | 1,058 | o |
| Thebes | Village | Alexander | 461 | 478 | 436 | o |
| Third Lake | Village | Lake | 1,233 | 1,359 | 1,182 | o |
| Thomasboro | Village | Champaign | 1,250 | 1,233 | 1,126 | o |
| Thompsonville | Village | Franklin | 602 | 571 | 543 | o |
| Thomson | Village | Carroll | 538 | 562 | 590 | o |
| Thornton | Village | Cook | 2,765 | 2,582 | 2,338 | o |
| Tilden | Village | Randolph | 919 | 922 | 934 | o |
| Tilton | Village | Vermilion | ... | 3,288 | 2,724 | o |
| Timberlane | Village | Boone | ... | 251 | 934 | o |
| Time | Village | Pike | 36 | 29 | 23 | o |
| Tinley Park | Village | 37,846 | 48,841 | 56,703 | o | |
| Tiskilwa | Village | Bureau | 838 | 787 | 829 | o |
| Toledo | Village | Cumberland | 1,197 | 1,171 | 1,238 | o |
| Tolono | Village | Champaign | 2,604 | 2,714 | 3,447 | o |
| Toluca | City | Marshall | 1,315 | 1,339 | 1,414 | o |
| Tonica | Village | La Salle | 717 | 685 | 768 | o |
| Topeka | Village | Mason | 93 | 90 | 76 | o |
| Toulon | City | Stark | 1,332 | 1,381 | 1,292 | o |
| Tovey | Village | Christian | 533 | 516 | 512 | o |
| Towanda | Village | McLean | 543 | 493 | 480 | o |
| Tower Hill | Village | Shelby | 601 | 609 | 611 | o |
| Tower Lakes | Village | Lake | 1,395 | 1,331 | 1,283 | o |
| Tremont | Village | Tazewell | 2,042 | 2,029 | 2,236 | o |
| Trenton | City | Clinton | 2,500 | 2,629 | 2,715 | o |
| Trout Valley | Village | McHenry | 595 | 595 | 537 | o |
| Troy | City | Madison | 6,488 | 8,522 | 9,888 | o |
| Troy Grove | Village | La Salle | 249 | 305 | 250 | o |
| Tuscola | City | Douglas | 4,165 | 4,481 | 4,480 | o |
| Twin Grove | Census-Designated Place | McLean | ... | ... | 1,564 | o |
| Ullin | Village | Pulaski | 402 | 779 | 463 | o |
| Union | Village | McHenry | 536 | 577 | 580 | o |
| Union Hill | Village | Kankakee | 74 | 68 | 58 | o |
| University Park | Village | 6,411 | 6,706 | 7,129 | o | |
| Urbana | City | Champaign | ... | 37,791 | 41,250 | o |
| Ursa | Village | Adams | 511 | 595 | 626 | o |
| Valier | Village | Franklin | 708 | 662 | 669 | o |
| Valley City | Village | Pike | 23 | 14 | 13 | o |
| Valmeyer | Village | Monroe | 989 | 607 | 1,263 | o |
| Vandalia | City | Fayette | 6,336 | 7,001 | 7,042 | o |
| Varna | Village | Marshall | 407 | 436 | 384 | o |
| Venedy | Village | Washington | 158 | 137 | 138 | o |
| Venetian Village | Census-Designated Place | Lake | ... | ... | 2,826 | o |
| Venice | City | Madison | 3,528 | 2,528 | 1,890 | o |
| Vergennes | Village | Jackson | ... | 339 | 298 | o |
| Vermilion | Village | Edgar | 280 | 239 | 225 | o |
| Vermont | Village | Fulton | 806 | 792 | 667 | o |
| Vernon | Village | Marion | 207 | 178 | 129 | o |
| Vernon Hills | Village | Lake | 15,338 | 20,163 | 25,113 | o |
| Verona | Village | Grundy | 242 | 257 | 215 | o |
| Versailles | Village | Brown | 480 | 567 | 478 | o |
| Victoria | Village | Knox | 303 | 325 | 316 | o |
| Vienna | City | Johnson | 1,496 | 1,261 | 1,434 | o |
| Villa Grove | City | Douglas | 2,814 | 2,553 | 2,537 | o |
| Villa Park | Village | DuPage | 21,516 | 22,106 | 21,904 | o |
| Viola | Village | Mercer | 976 | 956 | 955 | o |
| Virden | City | 3,688 | 3,488 | 3,425 | o | |
| Virgil | Village | Kane | ... | 337 | 329 | o |
| Virginia | City | Cass | 1,804 | 1,728 | 1,611 | o |
| Volo | Village | Lake | ... | 207 | 2,929 | o |
| Wadsworth | Village | Lake | ... | 3,360 | 3,815 | o |
| Waggoner | Village | Montgomery | 233 | 245 | 266 | o |
| Walnut | Village | Bureau | 1,476 | 1,463 | 1,416 | o |
| Walnut Hill | Village | Marion | 140 | 109 | 108 | o |
| Walshville | Village | Montgomery | 69 | 89 | 64 | o |
| Waltonville | Village | Jefferson | 398 | 428 | 434 | o |
| Wamac | City | 1,512 | 1,374 | 1,185 | o | |
| Wapella | Village | De Witt | 696 | 651 | 558 | o |
| Warren | Village | Jo Daviess | 1,577 | 1,496 | 1,428 | o |
| Warrensburg | Village | Macon | 1,273 | 1,289 | 1,210 | o |
| Warrenville | City | DuPage | 11,343 | 13,359 | 13,140 | o |
| Warsaw | City | Hancock | 1,883 | 1,793 | 1,607 | o |
| Washburn | Village | 1,075 | 1,152 | 1,155 | o | |
| Washington | City | Tazewell | ... | 11,708 | 15,134 | o |
| Washington Park | Village | St. Clair | ... | 5,942 | 4,196 | o |
| Wataga | Village | Knox | 879 | 857 | 843 | o |
| Waterloo | City | Monroe | ... | 8,140 | 9,811 | o |
| Waterman | Village | DeKalb | 1,074 | 1,241 | 1,506 | o |
| Watseka | City | Iroquois | 5,474 | 5,675 | 5,255 | o |
| Watson | Village | Effingham | 644 | 747 | 754 | o |
| Wauconda | Village | Lake | 6,508 | 9,608 | 13,603 | o |
| Waukegan | City | Lake | 69,621 | 88,002 | 89,078 | o |
| Waverly | City | Morgan | 1,404 | 1,346 | 1,307 | o |
| Wayne | Village | 1,605 | 2,148 | 2,431 | o | |
| Wayne City | Village | Wayne | 1,118 | 1,097 | 1,032 | o |
| Waynesville | Village | De Witt | 521 | 452 | 434 | o |
| Weldon | Village | De Witt | 407 | 439 | 429 | o |
| Wellington | Village | Iroquois | 294 | 264 | 242 | o |
| Wenona | City | Marshall | 965 | 1,057 | 1,056 | o |
| Wenonah | Village | Montgomery | 27 | 44 | 37 | o |
| West Brooklyn | Village | Lee | 160 | 174 | 142 | o |
| West Chicago | City | DuPage | 14,990 | 23,643 | 27,086 | o |
| West City | Village | Franklin | 736 | 718 | 661 | o |
| West Dundee | Village | Kane | 3,796 | 5,442 | 7,331 | o |
| West Frankfort | City | Franklin | 8,597 | 8,242 | 8,182 | o |
| West Peoria | City | Peoria | 5,364 | 4,767 | 4,458 | o |
| West Point | Village | Hancock | 214 | 195 | 178 | o |
| West Salem | Village | Edwards | 1,042 | 1,001 | 897 | o |
| West Union | Census-Designated Place | Clark | ... | ... | 288 | o |
| West York | Census-Designated Place | Crawford | ... | ... | 129 | o |
| Westchester | Village | Cook | 17,301 | 16,824 | 16,718 | o |
| Western Springs | Village | Cook | 11,960 | 12,548 | 12,975 | o |
| Westervelt | Census-Designated Place | Shelby | ... | ... | 128 | o |
| Westfield | Village | Clark | 677 | 678 | 601 | o |
| Westmont | Village | DuPage | 22,121 | 24,882 | 24,685 | o |
| Westville | Village | Vermilion | 3,326 | 3,175 | 3,202 | o |
| Wheaton | City | DuPage | 52,057 | 55,550 | 52,894 | o |
| Wheeler | Village | Jasper | 155 | 119 | 147 | o |
| Wheeling | Village | ... | 36,196 | 37,648 | o | |
| White City | Village | Macoupin | 222 | 221 | 232 | o |
| White Hall | City | Greene | 2,832 | 2,629 | 2,520 | o |
| White Heath | Census-Designated Place | Piatt | ... | ... | 290 | o |
| Whiteash | Village | Williamson | 249 | 268 | 241 | o |
| Williamsfield | Village | Knox | 571 | 620 | 578 | o |
| Williamson | Village | Madison | 278 | 251 | 230 | o |
| Williamsville | Village | Sangamon | 1,108 | 1,439 | 1,476 | o |
| Willisville | Village | Perry | 577 | 706 | 633 | o |
| Willow Hill | Village | Jasper | 268 | 250 | 230 | o |
| Willow Springs | Village | Cook | 4,505 | 5,070 | 5,524 | o |
| Willowbrook | Village | DuPage | 9,181 | 9,037 | 8,540 | o |
| Willowbrook | Census-Designated Place | Will | 1,808 | 2,130 | 2,076 | o |
| Wilmette | Village | Cook | 26,829 | 27,626 | 27,087 | o |
| Wilmington | Village | Greene | 129 | 120 | 142 | o |
| Wilmington | City | Will | 4,738 | 5,212 | 5,724 | o |
| Wilsonville | Village | Macoupin | 614 | 604 | 586 | o |
| Winchester | City | Scott | 1,830 | 1,658 | 1,593 | o |
| Windsor | Village | Mercer | 774 | 720 | 748 | o |
| Windsor | City | Shelby | 1,142 | 1,125 | 1,187 | o |
| Winfield | Village | DuPage | 7,107 | 8,784 | 9,080 | o |
| Winnebago | Village | Winnebago | 1,899 | 2,969 | 3,101 | o |
| Winnetka | Village | Cook | 12,034 | 12,461 | 12,187 | o |
| Winslow | Village | Stephenson | 319 | 345 | 338 | o |
| Winthrop Harbor | Village | Lake | 6,300 | 6,730 | 6,742 | o |
| Witt | City | Montgomery | 989 | 991 | 903 | o |
| Wonder Lake | Village | McHenry | ... | 2,880 | 4,026 | o |
| Wood Dale | City | DuPage | 12,778 | 13,596 | 13,770 | o |
| Wood River | City | Madison | 11,510 | 11,314 | 10,657 | o |
| Woodhull | Village | Henry | 808 | 809 | 811 | o |
| Woodland | Village | Iroquois | 313 | 322 | 324 | o |
| Woodlawn | Village | Jefferson | ... | 716 | 698 | o |
| Woodridge | Village | 26,590 | 31,041 | 32,971 | o | |
| Woodson | Village | Morgan | 478 | 559 | 512 | o |
| Woodstock | City | McHenry | 14,689 | 20,260 | 24,770 | o |
| Worden | Village | Madison | 903 | 916 | 1,044 | o |
| Worth | Village | Cook | 11,218 | 11,047 | 10,789 | o |
| Wyanet | Village | Bureau | 1,017 | 1,028 | 991 | o |
| Wyoming | City | Stark | 1,482 | 1,440 | 1,429 | o |
| Xenia | Village | Clay | 424 | 410 | 391 | o |
| Yale | Village | Jasper | 110 | 97 | 86 | o |
| Yates City | Village | Knox | 760 | 725 | 693 | o |
| Yorkville | City | Kendall | ... | 6,495 | 16,921 | o |
| Zeigler | City | Franklin | 1,748 | 1,669 | 1,801 | o |
| Zion | City | Lake | 19,849 | 22,916 | 24,413 | o |
Source: US Census Bureau (web).
2011-04-03WWW.CITYPOPULATION.DE