All counties in the State of Illinois.
| Name | Status | Population (C 2000-04-01) | Population (E 2004-07-01) | Population (E 2008-07-01) |
|---|---|---|---|---|
| Adams | County | 68,277 | 66,750 | 66,897 |
| Alexander | County | 9,590 | 8,941 | 8,152 |
| Bond | County | 17,633 | 18,252 | 18,253 |
| Boone | County | 41,784 | 47,753 | 54,142 |
| Brown | County | 6,950 | 6,782 | 6,573 |
| Bureau | County | 35,503 | 34,811 | 34,933 |
| Calhoun | County | 5,084 | 5,106 | 5,101 |
| Carroll | County | 16,674 | 16,189 | 15,841 |
| Cass | County | 13,695 | 13,598 | 13,574 |
| Champaign | County | 179,669 | 186,459 | 193,636 |
| Christian | County | 35,372 | 35,020 | 34,501 |
| Clark | County | 17,008 | 16,809 | 16,834 |
| Clay | County | 14,422 | 13,980 | 13,767 |
| Clinton | County | 35,522 | 35,973 | 36,711 |
| Coles | County | 53,196 | 52,420 | 52,172 |
| Cook | County | 5,376,834 | 5,316,484 | 5,294,664 |
| Crawford | County | 20,452 | 19,837 | 19,555 |
| Cumberland | County | 11,253 | 10,903 | 10,846 |
| De Witt | County | 16,798 | 16,427 | 16,354 |
| DeKalb | County | 88,975 | 97,015 | 106,321 |
| Douglas | County | 19,922 | 19,760 | 19,448 |
| DuPage | County | 904,152 | 924,777 | 930,528 |
| Edgar | County | 19,704 | 19,045 | 18,692 |
| Edwards | County | 6,971 | 6,708 | 6,501 |
| Effingham | County | 34,264 | 34,535 | 34,275 |
| Fayette | County | 21,802 | 20,603 | 20,981 |
| Ford | County | 14,241 | 14,057 | 14,050 |
| Franklin | County | 39,029 | 39,157 | 39,488 |
| Fulton | County | 38,250 | 37,381 | 36,719 |
| Gallatin | County | 6,445 | 6,117 | 5,982 |
| Greene | County | 14,761 | 14,170 | 13,644 |
| Grundy | County | 37,535 | 40,870 | 47,958 |
| Hamilton | County | 8,621 | 8,375 | 8,267 |
| Hancock | County | 20,125 | 19,227 | 18,691 |
| Hardin | County | 4,800 | 4,679 | 4,381 |
| Henderson | County | 8,213 | 7,917 | 7,477 |
| Henry | County | 51,018 | 49,940 | 49,569 |
| Iroquois | County | 31,334 | 30,346 | 30,285 |
| Jackson | County | 59,627 | 58,691 | 58,264 |
| Jasper | County | 10,117 | 9,919 | 9,698 |
| Jefferson | County | 40,045 | 40,054 | 40,083 |
| Jersey | County | 21,668 | 22,130 | 22,622 |
| Jo Daviess | County | 22,289 | 22,322 | 22,188 |
| Johnson | County | 12,880 | 13,512 | 13,731 |
| Kane | County | 404,114 | 468,212 | 507,579 |
| Kankakee | County | 103,833 | 107,399 | 112,524 |
| Kendall | County | 54,560 | 72,308 | 103,460 |
| Knox | County | 55,838 | 53,308 | 51,857 |
| La Salle | County | 111,546 | 111,030 | 112,474 |
| Lake | County | 644,587 | 686,580 | 712,453 |
| Lawrence | County | 15,452 | 16,466 | 16,681 |
| Lee | County | 36,062 | 35,086 | 35,129 |
| Livingston | County | 39,678 | 38,476 | 37,681 |
| Logan | County | 31,192 | 30,452 | 29,788 |
| Macon | County | 114,706 | 110,027 | 108,328 |
| Macoupin | County | 49,019 | 48,648 | 48,138 |
| Madison | County | 258,961 | 263,959 | 268,078 |
| Marion | County | 41,691 | 40,047 | 39,505 |
| Marshall | County | 13,156 | 12,999 | 12,670 |
| Mason | County | 16,037 | 15,666 | 15,076 |
| Massac | County | 15,161 | 15,239 | 15,070 |
| McDonough | County | 32,913 | 32,814 | 32,788 |
| McHenry | County | 260,098 | 294,596 | 318,641 |
| McLean | County | 150,433 | 158,369 | 165,298 |
| Menard | County | 12,486 | 12,520 | 12,464 |
| Mercer | County | 16,957 | 16,701 | 16,481 |
| Monroe | County | 27,619 | 30,652 | 32,804 |
| Montgomery | County | 30,644 | 30,146 | 29,773 |
| Morgan | County | 36,619 | 35,995 | 35,251 |
| Moultrie | County | 14,287 | 14,328 | 14,374 |
| Ogle | County | 51,032 | 53,343 | 55,167 |
| Peoria | County | 183,435 | 181,974 | 183,655 |
| Perry | County | 23,095 | 22,624 | 22,484 |
| Piatt | County | 16,369 | 16,344 | 16,505 |
| Pike | County | 17,379 | 16,809 | 16,519 |
| Pope | County | 4,413 | 4,231 | 4,079 |
| Pulaski | County | 7,348 | 6,830 | 6,362 |
| Putnam | County | 6,086 | 6,020 | 6,003 |
| Randolph | County | 33,893 | 33,254 | 32,641 |
| Richland | County | 16,287 | 15,941 | 15,532 |
| Rock Island | County | 149,388 | 146,857 | 146,886 |
| Saline | County | 26,733 | 26,133 | 25,944 |
| Sangamon | County | 188,958 | 192,227 | 194,925 |
| Schuyler | County | 7,189 | 7,026 | 6,916 |
| Scott | County | 5,534 | 5,370 | 5,181 |
| Shelby | County | 22,893 | 22,160 | 21,748 |
| St. Clair | County | 256,056 | 258,338 | 262,291 |
| Stark | County | 6,332 | 6,143 | 6,135 |
| Stephenson | County | 48,979 | 47,846 | 46,367 |
| Tazewell | County | 128,486 | 128,405 | 131,524 |
| Union | County | 18,293 | 18,092 | 18,191 |
| Vermilion | County | 83,924 | 82,170 | 80,680 |
| Wabash | County | 12,937 | 12,461 | 12,047 |
| Warren | County | 18,735 | 17,760 | 17,541 |
| Washington | County | 15,148 | 15,003 | 14,728 |
| Wayne | County | 17,151 | 16,679 | 16,494 |
| White | County | 15,371 | 15,017 | 14,671 |
| Whiteside | County | 60,651 | 59,461 | 59,153 |
| Will | County | 502,227 | 608,767 | 681,097 |
| Williamson | County | 61,294 | 63,080 | 64,628 |
| Winnebago | County | 278,422 | 287,020 | 300,252 |
| Woodford | County | 35,469 | 36,509 | 38,503 |
| Illinois | Federal State | 12,419,660 | 12,665,718 | 12,901,563 |
Contents: All incorporated places in the State of Illinois.
| Name | Status | County | Population (C 2000-04-01) | Population (E 2004-07-01) | Population (E 2008-07-01) |
|---|---|---|---|---|---|
| Abingdon | City | Knox | 3,612 | 3,387 | 3,269 |
| Addieville | Village | Washington | 267 | 261 | 252 |
| Addison | Village | DuPage | 36,423 | 37,072 | 36,917 |
| Adeline | Village | Ogle | 139 | 142 | 141 |
| Albany | Village | Whiteside | 895 | 894 | 913 |
| Albers | Village | Clinton | 878 | 966 | 1,085 |
| Albion | City | Edwards | 1,937 | 1,870 | 1,814 |
| Aledo | City | Mercer | 3,613 | 3,501 | 3,565 |
| Alexis | Village | 863 | 822 | 797 | |
| Algonquin | Village | 22,952 | 28,223 | 30,352 | |
| Alhambra | Village | Madison | 638 | 644 | 642 |
| Allendale | Village | Wabash | 528 | 504 | 482 |
| Allenville | Village | Moultrie | 154 | 149 | 146 |
| Allerton | Village | 293 | 283 | 275 | |
| Alma | Village | Marion | 386 | 374 | 370 |
| Alorton | Village | St. Clair | 2,749 | 2,642 | 2,526 |
| Alpha | Village | Henry | 726 | 699 | 683 |
| Alsey | Village | Scott | 243 | 236 | 227 |
| Alsip | Village | Cook | 19,725 | 19,165 | 18,692 |
| Altamont | City | Effingham | 2,285 | 2,269 | 2,254 |
| Alto Pass | Village | Union | 388 | 386 | 382 |
| Alton | City | Madison | 30,545 | 29,783 | 29,393 |
| Altona | Village | Knox | 570 | 543 | 525 |
| Alvin | Village | Vermilion | 316 | 315 | 310 |
| Amboy | City | Lee | 2,633 | 2,576 | 2,574 |
| Anchor | Village | McLean | 175 | 170 | 171 |
| Andalusia | Village | Rock Island | 1,050 | 1,046 | 1,067 |
| Andover | Village | Henry | 594 | 574 | 566 |
| Anna | City | Union | 5,168 | 5,075 | 5,025 |
| Annawan | Town | Henry | 870 | 903 | 904 |
| Antioch | Village | Lake | 8,909 | 11,210 | 13,892 |
| Apple River | Village | Jo Daviess | 379 | 372 | 359 |
| Arcola | City | Douglas | 2,846 | 2,834 | 2,783 |
| Arenzville | Village | Cass | 419 | 414 | 401 |
| Argenta | Village | Macon | 921 | 854 | 824 |
| Arlington | Village | Bureau | 211 | 205 | 203 |
| Arlington Heights | Village | 76,429 | 74,896 | 73,399 | |
| Armington | Village | Tazewell | 368 | 354 | 349 |
| Aroma Park | Village | Kankakee | 1,030 | 1,011 | 1,035 |
| Arrowsmith | Village | McLean | 298 | 287 | 288 |
| Arthur | Village | 2,203 | 2,151 | 2,129 | |
| Ashkum | Village | Iroquois | 724 | 698 | 693 |
| Ashland | Village | Cass | 1,361 | 1,364 | 1,321 |
| Ashley | City | Washington | 613 | 586 | 573 |
| Ashmore | Village | Coles | 809 | 783 | 755 |
| Ashton | Village | Lee | 1,142 | 1,190 | 1,166 |
| Assumption | City | Christian | 1,261 | 1,229 | 1,196 |
| Astoria | Village | Fulton | 1,193 | 1,150 | 1,124 |
| Athens | City | Menard | 1,724 | 1,774 | 1,780 |
| Atkinson | Town | Henry | 1,001 | 967 | 955 |
| Atlanta | City | Logan | 1,649 | 1,664 | 1,633 |
| Atwood | Village | 1,310 | 1,262 | 1,226 | |
| Auburn | City | Sangamon | 4,383 | 4,364 | 4,362 |
| Augusta | Village | Hancock | 657 | 627 | 607 |
| Aurora | City | 143,288 | 165,257 | 171,782 | |
| Ava | City | Jackson | 662 | 665 | 642 |
| Aviston | Village | Clinton | 1,251 | 1,437 | 1,723 |
| Avon | Village | Fulton | 915 | 877 | 849 |
| Baldwin | Village | Randolph | 434 | 418 | 404 |
| Banner | Village | Fulton | 149 | 146 | 142 |
| Bannockburn | Village | Lake | 1,429 | 1,805 | 1,879 |
| Bardolph | Village | McDonough | 253 | 239 | 229 |
| Barrington | Village | 10,183 | 10,110 | 10,374 | |
| Barrington Hills | Village | 3,930 | 4,189 | 4,354 | |
| Barry | City | Pike | 1,368 | 1,319 | 1,290 |
| Bartelso | Village | Clinton | 599 | 593 | 583 |
| Bartlett | Village | 36,763 | 37,635 | 42,209 | |
| Bartonville | Village | Peoria | 6,338 | 6,174 | 6,160 |
| Basco | Village | Hancock | 107 | 102 | 98 |
| Batavia | City | 24,261 | 26,660 | 27,502 | |
| Batchtown | Village | Calhoun | 218 | 215 | 212 |
| Bath | Village | Mason | 310 | 304 | 293 |
| Bay View Gardens | Village | Woodford | 366 | 354 | 356 |
| Baylis | Village | Pike | 265 | 253 | 244 |
| Beach Park | Village | Lake | 10,105 | 12,013 | 13,119 |
| Beardstown | City | Cass | 5,803 | 5,692 | 5,859 |
| Beaverville | Village | Iroquois | 391 | 377 | 379 |
| Beckemeyer | Village | Clinton | 1,083 | 1,086 | 1,087 |
| Bedford Park | Village | Cook | 574 | 551 | 533 |
| Beecher | Village | Will | 2,111 | 2,591 | 3,029 |
| Beecher City | Village | Effingham | 493 | 498 | 487 |
| Belgium | Village | Vermilion | 466 | 472 | 461 |
| Belknap | Village | Johnson | 133 | 136 | 138 |
| Belle Prairie City | Town | Hamilton | 60 | 59 | 58 |
| Belle Rive | Village | Jefferson | 371 | 374 | 372 |
| Belleville | City | St. Clair | 42,236 | 41,357 | 41,097 |
| Bellevue | Village | Peoria | 1,887 | 1,807 | 1,783 |
| Bellflower | Village | McLean | 405 | 387 | 387 |
| Bellmont | Village | Wabash | 297 | 292 | 280 |
| Bellwood | Village | Cook | 20,535 | 19,678 | 18,973 |
| Belvidere | City | Boone | 21,051 | 23,481 | 26,461 |
| Bement | Village | Piatt | 1,784 | 1,721 | 1,698 |
| Benld | City | Macoupin | 1,541 | 1,486 | 1,463 |
| Bensenville | Village | 20,712 | 20,509 | 20,138 | |
| Benson | Village | Woodford | 408 | 406 | 407 |
| Bentley | Town | Hancock | 43 | 41 | 40 |
| Benton | City | Franklin | 6,936 | 6,903 | 6,957 |
| Berkeley | Village | Cook | 5,245 | 5,044 | 4,913 |
| Berlin | Village | Sangamon | 149 | 148 | 143 |
| Berwyn | City | Cook | 54,016 | 51,801 | 49,919 |
| Bethalto | Village | Madison | 9,562 | 9,690 | 9,933 |
| Bethany | Village | Moultrie | 1,290 | 1,254 | 1,226 |
| Big Rock | Village | 688 | 728 | 736 | |
| Biggsville | Village | Henderson | 343 | 329 | 307 |
| Bingham | Village | Fayette | 117 | 116 | 116 |
| Birds | Village | Lawrence | 51 | 50 | 49 |
| Bishop Hill | Village | Henry | 123 | 117 | 116 |
| Bismarck | Village | Vermilion | 544 | 543 | 554 |
| Blandinsville | Village | McDonough | 772 | 726 | 694 |
| Bloomingdale | Village | DuPage | 21,746 | 21,790 | 21,848 |
| Bloomington | City | McLean | 65,422 | 69,607 | 73,026 |
| Blue Island | City | Cook | 23,463 | 22,922 | 22,325 |
| Blue Mound | Village | Macon | 1,129 | 1,055 | 1,020 |
| Bluffs | Village | Scott | 751 | 727 | 701 |
| Bluford | Village | Jefferson | 785 | 761 | 762 |
| Bolingbrook | Village | 56,387 | 66,206 | 70,823 | |
| Bondville | Village | Champaign | 455 | 458 | 438 |
| Bone Gap | Village | Edwards | 272 | 263 | 254 |
| Bonfield | Village | Kankakee | 364 | 374 | 379 |
| Bonnie | Village | Jefferson | 424 | 419 | 419 |
| Bourbonnais | Village | Kankakee | 15,373 | 16,810 | 19,024 |
| Bowen | Village | Hancock | 535 | 510 | 493 |
| Braceville | Village | Grundy | 792 | 793 | 832 |
| Bradford | Village | Stark | 787 | 762 | 758 |
| Bradley | Village | Kankakee | 13,031 | 13,634 | 14,964 |
| Braidwood | City | Will | 5,214 | 5,915 | 6,664 |
| Breese | City | Clinton | 4,097 | 4,231 | 4,357 |
| Bridgeport | City | Lawrence | 2,168 | 2,133 | 2,085 |
| Bridgeview | Village | Cook | 15,336 | 15,006 | 14,991 |
| Brighton | Village | 2,185 | 2,274 | 2,376 | |
| Brimfield | Village | Peoria | 933 | 907 | 902 |
| Broadlands | Village | Champaign | 315 | 309 | 305 |
| Broadview | Village | Cook | 8,264 | 7,921 | 7,625 |
| Broadwell | Village | Logan | 174 | 172 | 167 |
| Brocton | Village | Edgar | 322 | 301 | 295 |
| Brookfield | Village | Cook | 19,085 | 18,607 | 18,077 |
| Brooklyn | Village | St. Clair | 676 | 648 | 620 |
| Brookport | City | Massac | 1,054 | 1,056 | 1,027 |
| Broughton | Village | Hamilton | 196 | 192 | 189 |
| Browning | Village | Schuyler | 130 | 127 | 124 |
| Browns | Village | Edwards | 175 | 169 | 163 |
| Brownstown | Village | Fayette | 715 | 710 | 706 |
| Brussels | Village | Calhoun | 147 | 144 | 142 |
| Bryant | Village | Fulton | 255 | 249 | 242 |
| Buckingham | Village | Kankakee | 237 | 233 | 241 |
| Buckley | Village | Iroquois | 593 | 572 | 564 |
| Buckner | Village | Franklin | 477 | 486 | 488 |
| Buda | Village | Bureau | 592 | 573 | 567 |
| Buffalo | Village | Sangamon | 491 | 467 | 451 |
| Buffalo Grove | Village | 43,216 | 43,015 | 42,972 | |
| Bull Valley | Village | McHenry | 726 | 740 | 841 |
| Bulpitt | Village | Christian | 206 | 199 | 193 |
| Buncombe | Village | Johnson | 186 | 190 | 193 |
| Bunker Hill | City | Macoupin | 1,801 | 1,778 | 1,741 |
| Burbank | City | Cook | 27,902 | 27,635 | 27,567 |
| Bureau Junction | Village | Bureau | 368 | 358 | 353 |
| Burlington | Village | Kane | 452 | 480 | 482 |
| Burnham | Village | Cook | 4,170 | 4,088 | 3,973 |
| Burnt Prairie | Village | White | 58 | 57 | 55 |
| Burr Ridge | Village | 10,732 | 11,161 | 11,398 | |
| Bush | Village | Williamson | 257 | 263 | 261 |
| Bushnell | City | McDonough | 3,240 | 3,052 | 2,921 |
| Butler | Village | Montgomery | 197 | 195 | 190 |
| Byron | City | Ogle | 3,027 | 3,534 | 3,850 |
| Cabery | Village | 263 | 263 | 260 | |
| Cahokia | Village | St. Clair | 16,391 | 15,721 | 15,103 |
| Cairo | City | Alexander | 3,632 | 3,403 | 3,105 |
| Caledonia | Village | Boone | 201 | 216 | 226 |
| Calhoun | Village | Richland | 222 | 218 | 211 |
| Calumet City | City | Cook | 39,074 | 38,025 | 36,800 |
| Calumet Park | Village | Cook | 8,516 | 8,175 | 7,980 |
| Camargo | Village | Douglas | 467 | 493 | 511 |
| Cambria | Village | Williamson | 1,332 | 1,340 | 1,336 |
| Cambridge | Village | Henry | 2,180 | 2,101 | 2,093 |
| Camden | Village | Schuyler | 97 | 95 | 93 |
| Camp Point | Village | Adams | 1,244 | 1,188 | 1,193 |
| Campbell Hill | Village | Jackson | 333 | 322 | 308 |
| Campton Hills | Village | Kane | 10,405 | 10,952 | 11,031 |
| Campus | Village | Livingston | 145 | 145 | 140 |
| Canton | City | Fulton | 15,317 | 14,868 | 14,545 |
| Cantrall | Village | Sangamon | 139 | 137 | 133 |
| Capron | Village | Boone | 963 | 1,211 | 1,547 |
| Carbon Cliff | Village | Rock Island | 1,689 | 1,672 | 1,657 |
| Carbon Hill | Village | Grundy | 392 | 395 | 419 |
| Carbondale | City | Jackson | 26,309 | 25,494 | 26,231 |
| Carlinville | City | Macoupin | 6,048 | 6,089 | 5,962 |
| Carlock | Village | McLean | 456 | 438 | 478 |
| Carlyle | City | Clinton | 3,406 | 3,398 | 3,378 |
| Carmi | City | White | 5,422 | 5,316 | 5,203 |
| Carol Stream | Village | DuPage | 40,483 | 40,116 | 40,004 |
| Carpentersville | Village | Kane | 30,741 | 35,753 | 37,741 |
| Carrier Mills | Village | Saline | 1,886 | 1,846 | 1,832 |
| Carrollton | City | Greene | 2,605 | 2,478 | 2,460 |
| Carterville | City | Williamson | 4,716 | 5,076 | 5,441 |
| Carthage | City | Hancock | 2,724 | 2,546 | 2,504 |
| Cary | Village | McHenry | 15,605 | 18,556 | 19,559 |
| Casey | City | 2,942 | 2,918 | 2,914 | |
| Caseyville | Village | St. Clair | 4,429 | 4,416 | 4,280 |
| Catlin | Village | Vermilion | 2,104 | 2,062 | 2,110 |
| Cave-In-Rock | Village | Hardin | 346 | 330 | 307 |
| Cedar Point | Village | La Salle | 262 | 258 | 261 |
| Cedarville | Village | Stephenson | 719 | 702 | 683 |
| Central City | Village | Marion | 1,371 | 1,335 | 1,313 |
| Centralia | City | 14,383 | 13,734 | 13,569 | |
| Centreville | City | St. Clair | 5,951 | 5,884 | 5,635 |
| Cerro Gordo | Village | Piatt | 1,440 | 1,378 | 1,343 |
| Chadwick | Village | Carroll | 505 | 489 | 471 |
| Champaign | City | Champaign | 70,269 | 74,175 | 79,389 |
| Chandlerville | Village | Cass | 704 | 713 | 693 |
| Channahon | Village | 7,837 | 11,251 | 14,030 | |
| Chapin | Village | Morgan | 592 | 585 | 568 |
| Charleston | City | Coles | 21,191 | 21,069 | 21,715 |
| Chatham | Village | Sangamon | 8,638 | 9,607 | 10,676 |
| Chatsworth | Town | Livingston | 1,280 | 1,229 | 1,179 |
| Chebanse | Village | 1,148 | 1,101 | 1,097 | |
| Chenoa | City | McLean | 1,845 | 1,816 | 1,832 |
| Cherry | Village | Bureau | 509 | 493 | 488 |
| Cherry Valley | Village | Winnebago | 2,200 | 2,214 | 2,267 |
| Chester | City | Randolph | 8,421 | 8,086 | 7,835 |
| Chesterfield | Village | Macoupin | 223 | 220 | 215 |
| Chicago | City | 2,896,051 | 2,857,596 | 2,853,114 | |
| Chicago Heights | City | Cook | 32,799 | 31,574 | 30,586 |
| Chicago Ridge | Village | Cook | 14,127 | 13,676 | 13,366 |
| Chillicothe | City | Peoria | 5,998 | 5,799 | 5,901 |
| Chrisman | City | Edgar | 1,318 | 1,260 | 1,232 |
| Christopher | City | Franklin | 2,848 | 2,805 | 2,819 |
| Cicero | Town | Cook | 85,616 | 82,777 | 80,414 |
| Cisco | Village | Piatt | 286 | 282 | 274 |
| Cisne | Village | Wayne | 673 | 656 | 649 |
| Cissna Park | Village | Iroquois | 811 | 771 | 788 |
| Claremont | Village | Richland | 212 | 208 | 201 |
| Clarendon Hills | Village | DuPage | 7,803 | 8,404 | 8,582 |
| Clay City | Village | Clay | 994 | 955 | 939 |
| Clayton | Village | Adams | 904 | 865 | 829 |
| Clear Lake | Village | Sangamon | 267 | 258 | 247 |
| Cleveland | Village | Henry | 253 | 242 | 239 |
| Clifton | Village | Iroquois | 1,317 | 1,269 | 1,257 |
| Clinton | City | De Witt | 7,511 | 7,217 | 7,154 |
| Coal City | Village | 4,848 | 5,010 | 5,729 | |
| Coal Valley | Village | 3,608 | 3,844 | 4,001 | |
| Coalton | Village | Montgomery | 307 | 303 | 297 |
| Coatsburg | Village | Adams | 226 | 223 | 222 |
| Cobden | Village | Union | 1,116 | 1,096 | 1,098 |
| Coffeen | City | Montgomery | 707 | 701 | 687 |
| Colchester | City | McDonough | 1,500 | 1,414 | 1,355 |
| Coleta | Village | Whiteside | 155 | 154 | 151 |
| Colfax | Village | McLean | 989 | 993 | 1,001 |
| Collinsville | City | 24,939 | 25,560 | 25,960 | |
| Colona | City | Henry | 5,216 | 5,158 | 5,232 |
| Colp | Village | Williamson | 224 | 229 | 227 |
| Columbia | City | 7,960 | 8,712 | 9,342 | |
| Columbus | Village | Adams | 112 | 111 | 110 |
| Compton | Village | Lee | 347 | 340 | 333 |
| Concord | Village | Morgan | 176 | 174 | 169 |
| Congerville | Village | Woodford | 466 | 484 | 500 |
| Cooksville | Village | McLean | 213 | 203 | 204 |
| Cordova | Village | Rock Island | 651 | 680 | 682 |
| Cornell | Village | Livingston | 511 | 500 | 488 |
| Cortland | Town | DeKalb | 2,124 | 2,942 | 4,164 |
| Coulterville | Village | Randolph | 1,230 | 1,191 | 1,148 |
| Country Club Hills | City | Cook | 16,169 | 16,220 | 16,723 |
| Countryside | City | Cook | 6,068 | 5,905 | 5,795 |
| Cowden | Village | Shelby | 612 | 588 | 568 |
| Crainville | Village | Williamson | 1,115 | 1,175 | 1,353 |
| Creal Springs | City | Williamson | 702 | 717 | 713 |
| Crescent City | Village | Iroquois | 631 | 600 | 591 |
| Crest Hill | City | Will | 13,503 | 17,899 | 20,451 |
| Creston | Village | Ogle | 543 | 559 | 623 |
| Crestwood | Village | Cook | 11,251 | 11,214 | 11,051 |
| Crete | Village | Will | 7,779 | 8,470 | 9,041 |
| Creve Coeur | Village | Tazewell | 5,448 | 5,250 | 5,206 |
| Crossville | Village | White | 782 | 738 | 712 |
| Crystal Lake | City | McHenry | 38,214 | 40,341 | 41,797 |
| Cuba | City | Fulton | 1,418 | 1,372 | 1,333 |
| Cullom | Village | Livingston | 556 | 538 | 521 |
| Curran | Village | 249 | 246 | 238 | |
| Cutler | Village | Perry | 543 | 533 | 528 |
| Cypress | Village | Johnson | 271 | 277 | 281 |
| Dahlgren | Village | Hamilton | 514 | 502 | 496 |
| Dakota | Village | Stephenson | 499 | 487 | 471 |
| Dallas City | City | 1,055 | 1,012 | 974 | |
| Dalton City | Village | Moultrie | 581 | 560 | 546 |
| Dalzell | Village | 717 | 717 | 717 | |
| Damiansville | Village | Clinton | 374 | 370 | 408 |
| Dana | Village | La Salle | 173 | 173 | 170 |
| Danforth | Village | Iroquois | 587 | 565 | 562 |
| Danvers | Village | McLean | 1,183 | 1,145 | 1,149 |
| Danville | City | Vermilion | 33,917 | 32,838 | 32,248 |
| Darien | City | DuPage | 22,946 | 22,790 | 22,370 |
| Davis | Village | Stephenson | 662 | 644 | 625 |
| Davis Junction | Village | Ogle | 940 | 1,335 | 2,270 |
| Dawson | Village | Sangamon | 466 | 456 | 462 |
| De Land | Village | Piatt | 475 | 462 | 458 |
| De Pue | Village | Bureau | 1,842 | 1,771 | 1,753 |
| De Soto | Village | Jackson | 1,653 | 1,620 | 1,559 |
| De Witt | Village | De Witt | 188 | 182 | 178 |
| Decatur | City | Macon | 82,132 | 78,194 | 76,256 |
| Deer Creek | Village | 608 | 701 | 741 | |
| Deer Grove | Village | Whiteside | 48 | 48 | 47 |
| Deer Park | Village | 3,132 | 3,177 | 3,349 | |
| Deerfield | Village | 18,422 | 19,230 | 19,667 | |
| DeKalb | City | DeKalb | 39,072 | 42,903 | 45,497 |
| Delavan | City | Tazewell | 1,825 | 1,780 | 1,755 |
| Des Plaines | City | Cook | 57,131 | 56,102 | 57,062 |
| Detroit | Village | Pike | 93 | 89 | 86 |
| Diamond | Village | 1,393 | 1,857 | 2,388 | |
| Dieterich | Village | Effingham | 602 | 608 | 595 |
| Divernon | Village | Sangamon | 1,203 | 1,164 | 1,129 |
| Dix | Village | Jefferson | 494 | 497 | 498 |
| Dixmoor | Village | Cook | 3,934 | 3,829 | 3,794 |
| Dixon | City | Lee | 16,019 | 15,030 | 15,033 |
| Dolton | Village | Cook | 25,614 | 24,671 | 23,889 |
| Dongola | Village | Union | 806 | 799 | 791 |
| Donnellson | Village | 262 | 261 | 256 | |
| Donovan | Village | Iroquois | 351 | 331 | 325 |
| Dorchester | Village | Macoupin | 142 | 137 | 166 |
| Dover | Village | Bureau | 172 | 167 | 165 |
| Dowell | Village | Jackson | 443 | 437 | 422 |
| Downers Grove | Village | DuPage | 49,940 | 49,564 | 49,250 |
| Downs | Village | McLean | 778 | 755 | 761 |
| Du Bois | Village | Washington | 222 | 214 | 207 |
| Du Quoin | City | Perry | 6,464 | 6,375 | 6,326 |
| Dunfermline | Village | Fulton | 262 | 283 | 301 |
| Dunlap | Village | Peoria | 966 | 943 | 934 |
| Dupo | Village | St. Clair | 3,930 | 3,862 | 4,073 |
| Durand | Village | Winnebago | 1,077 | 1,073 | 1,084 |
| Dwight | Village | 4,375 | 4,335 | 4,267 | |
| Eagarville | Village | Macoupin | 128 | 126 | 124 |
| Earlville | City | La Salle | 1,769 | 1,777 | 1,822 |
| East Alton | Village | Madison | 6,830 | 6,676 | 6,563 |
| East Brooklyn | Village | Grundy | 123 | 119 | 127 |
| East Cape Girardeau | Village | Alexander | 437 | 411 | 371 |
| East Carondelet | Village | St. Clair | 315 | 575 | 577 |
| East Dubuque | City | Jo Daviess | 2,004 | 1,901 | 1,921 |
| East Dundee | Village | 2,957 | 3,133 | 3,121 | |
| East Galesburg | Village | Knox | 839 | 798 | 775 |
| East Gillespie | Village | Macoupin | 234 | 226 | 238 |
| East Hazel Crest | Village | Cook | 1,607 | 1,567 | 1,536 |
| East Moline | City | Rock Island | 21,519 | 21,002 | 20,892 |
| East Peoria | City | Tazewell | 22,698 | 22,437 | 22,760 |
| East St. Louis | City | St. Clair | 31,622 | 30,113 | 28,773 |
| Easton | Village | Mason | 373 | 366 | 353 |
| Eddyville | Village | Pope | 153 | 147 | 141 |
| Edgewood | Village | Effingham | 527 | 533 | 520 |
| Edinburg | Village | Christian | 1,135 | 1,134 | 1,108 |
| Edwardsville | City | Madison | 22,378 | 23,933 | 24,557 |
| Effingham | City | Effingham | 12,422 | 12,429 | 12,489 |
| El Dara | Village | Pike | 89 | 85 | 82 |
| El Paso | City | 2,695 | 2,717 | 2,802 | |
| Elburn | Village | Kane | 2,802 | 3,836 | 5,276 |
| Eldorado | City | Saline | 4,534 | 4,430 | 4,392 |
| Eldred | Village | Greene | 211 | 206 | 197 |
| Elgin | City | 94,831 | 97,102 | 106,330 | |
| Elizabeth | Village | Jo Daviess | 684 | 672 | 650 |
| Elizabethtown | Village | Hardin | 348 | 332 | 308 |
| Elk Grove Village | Village | 34,725 | 34,004 | 33,320 | |
| Elkhart | Village | Logan | 443 | 427 | 423 |
| Elkville | Village | Jackson | 985 | 953 | 920 |
| Elliott | Village | Ford | 341 | 339 | 335 |
| Ellis Grove | Village | Randolph | 381 | 373 | 360 |
| Ellisville | Village | Fulton | 87 | 85 | 82 |
| Ellsworth | Village | McLean | 271 | 261 | 260 |
| Elmhurst | City | 42,821 | 44,314 | 46,013 | |
| Elmwood | City | Peoria | 1,944 | 1,895 | 1,871 |
| Elmwood Park | Village | Cook | 25,405 | 24,559 | 24,052 |
| Elsah | Village | Jersey | 635 | 651 | 631 |
| Elvaston | Village | Hancock | 152 | 145 | 140 |
| Elwood | Village | Will | 1,620 | 2,101 | 2,341 |
| Emden | Village | Logan | 515 | 493 | 477 |
| Emington | Village | Livingston | 120 | 115 | 110 |
| Energy | Village | Williamson | 1,175 | 1,177 | 1,199 |
| Enfield | Village | White | 625 | 614 | 601 |
| Equality | Village | Gallatin | 721 | 683 | 668 |
| Erie | Village | Whiteside | 1,589 | 1,551 | 1,548 |
| Essex | Village | Kankakee | 554 | 660 | 705 |
| Eureka | City | Woodford | 5,058 | 5,100 | 5,368 |
| Evanston | City | Cook | 74,239 | 75,099 | 77,693 |
| Evansville | Village | Randolph | 724 | 701 | 676 |
| Evergreen Park | Village | Cook | 20,821 | 20,011 | 19,359 |
| Ewing | Village | Franklin | 310 | 317 | 319 |
| Exeter | Village | Scott | 70 | 68 | 65 |
| Fairbury | City | Livingston | 3,980 | 3,907 | 3,783 |
| Fairfield | City | Wayne | 5,410 | 5,209 | 5,165 |
| Fairmont City | Village | 2,439 | 2,342 | 2,244 | |
| Fairmount | Village | Vermilion | 640 | 639 | 626 |
| Fairview | Village | Fulton | 493 | 477 | 480 |
| Fairview Heights | City | St. Clair | 14,972 | 15,671 | 16,643 |
| Farina | Village | 558 | 554 | 552 | |
| Farmer City | City | De Witt | 2,050 | 1,986 | 1,951 |
| Farmersville | Village | Montgomery | 768 | 761 | 747 |
| Farmington | City | Fulton | 2,603 | 2,494 | 2,433 |
| Fayetteville | Village | St. Clair | 384 | 388 | 371 |
| Ferris | Village | Hancock | 168 | 160 | 155 |
| Fidelity | Village | Jersey | 105 | 105 | 103 |
| Fieldon | Village | Jersey | 271 | 271 | 267 |
| Fillmore | Village | Montgomery | 362 | 358 | 351 |
| Findlay | Village | Shelby | 723 | 685 | 662 |
| Fisher | Village | Champaign | 1,651 | 1,653 | 1,755 |
| Fithian | Village | Vermilion | 506 | 554 | 545 |
| Flanagan | Village | Livingston | 1,083 | 1,056 | 1,024 |
| Flat Rock | Village | Crawford | 415 | 406 | 399 |
| Flora | City | Clay | 5,065 | 4,845 | 4,772 |
| Florence | Village | Pike | 71 | 68 | 66 |
| Flossmoor | Village | Cook | 9,333 | 9,364 | 9,309 |
| Foosland | Village | Champaign | 90 | 89 | 85 |
| Ford Heights | Village | Cook | 3,456 | 3,319 | 3,202 |
| Forest City | Village | Mason | 287 | 279 | 267 |
| Forest Park | Village | Cook | 15,688 | 15,194 | 15,224 |
| Forest View | Village | Cook | 778 | 745 | 718 |
| Forrest | Village | Livingston | 1,211 | 1,180 | 1,152 |
| Forreston | Village | Ogle | 1,469 | 1,493 | 1,490 |
| Forsyth | Village | Macon | 2,442 | 2,652 | 3,002 |
| Fox Lake | Village | 9,202 | 10,278 | 11,087 | |
| Fox River Grove | Village | 4,971 | 5,154 | 5,172 | |
| Frankfort | Village | 10,463 | 14,577 | 17,981 | |
| Franklin | Village | Morgan | 619 | 612 | 597 |
| Franklin Grove | Village | Lee | 1,052 | 1,017 | 1,000 |
| Franklin Park | Village | Cook | 19,453 | 18,648 | 17,965 |
| Freeburg | Village | St. Clair | 4,062 | 4,151 | 4,481 |
| Freeman Spur | Village | 273 | 279 | 278 | |
| Freeport | City | Stephenson | 26,460 | 25,613 | 24,615 |
| Fulton | City | Whiteside | 3,888 | 3,847 | 3,832 |
| Fults | Village | Monroe | 28 | 29 | 29 |
| Galatia | Village | Saline | 1,013 | 990 | 983 |
| Galena | City | Jo Daviess | 3,473 | 3,410 | 3,333 |
| Galesburg | City | Knox | 33,795 | 32,155 | 31,181 |
| Galva | City | Henry | 2,798 | 2,711 | 2,648 |
| Gardner | Village | Grundy | 1,406 | 1,400 | 1,489 |
| Garrett | Village | Douglas | 198 | 197 | 191 |
| Gays | Village | Moultrie | 265 | 266 | 259 |
| Geneseo | City | Henry | 6,496 | 6,367 | 6,437 |
| Geneva | City | Kane | 19,651 | 22,813 | 24,302 |
| Genoa | City | DeKalb | 4,200 | 4,645 | 5,101 |
| Georgetown | City | Vermilion | 3,628 | 3,524 | 3,440 |
| German Valley | Village | Stephenson | 481 | 465 | 450 |
| Germantown | Village | Clinton | 1,269 | 1,255 | 1,232 |
| Germantown Hills | Village | Woodford | 2,242 | 2,778 | 3,213 |
| Gibson City | City | Ford | 3,389 | 3,273 | 3,287 |
| Gifford | Village | Champaign | 838 | 990 | 993 |
| Gilberts | Village | Kane | 1,295 | 4,219 | 5,996 |
| Gillespie | City | Macoupin | 3,407 | 3,258 | 3,182 |
| Gilman | City | Iroquois | 1,793 | 1,734 | 1,714 |
| Girard | City | Macoupin | 2,245 | 2,217 | 2,166 |
| Gladstone | Village | Henderson | 284 | 273 | 255 |
| Glasford | Village | Peoria | 1,076 | 1,034 | 1,033 |
| Glasgow | Village | Scott | 170 | 166 | 159 |
| Glen Carbon | Village | Madison | 10,577 | 11,649 | 12,607 |
| Glen Ellyn | Village | DuPage | 27,202 | 27,234 | 27,142 |
| Glencoe | Village | Cook | 8,762 | 8,902 | 9,038 |
| Glendale Heights | Village | DuPage | 31,864 | 32,603 | 31,847 |
| Glenview | Village | Cook | 43,081 | 45,675 | 46,180 |
| Glenwood | Village | Cook | 9,020 | 8,692 | 8,489 |
| Godfrey | Village | Madison | 16,754 | 17,135 | 17,524 |
| Godley | Village | 594 | 680 | 703 | |
| Golconda | City | Pope | 724 | 677 | 653 |
| Golden | Village | Adams | 629 | 619 | 616 |
| Golden Gate | Village | Wayne | 100 | 98 | 96 |
| Golf | Village | Cook | 451 | 458 | 445 |
| Good Hope | Village | McDonough | 416 | 391 | 375 |
| Goodfield | Village | 686 | 757 | 844 | |
| Goreville | Village | Johnson | 941 | 945 | 972 |
| Gorham | Village | Jackson | 256 | 254 | 245 |
| Grafton | City | Jersey | 609 | 669 | 725 |
| Grand Ridge | Village | La Salle | 546 | 524 | 520 |
| Grand Tower | City | Jackson | 624 | 604 | 579 |
| Grandview | Village | Sangamon | 1,537 | 1,459 | 1,410 |
| Granite City | City | Madison | 32,009 | 31,229 | 30,703 |
| Grant Park | Village | Kankakee | 1,409 | 1,564 | 1,718 |
| Grantfork | Village | Madison | 254 | 263 | 327 |
| Granville | Village | Putnam | 1,414 | 1,383 | 1,343 |
| Grayslake | Village | Lake | 18,532 | 20,459 | 21,735 |
| Grayville | City | 1,735 | 1,635 | 1,585 | |
| Green Oaks | Village | Lake | 3,581 | 3,841 | 3,913 |
| Green Valley | Village | Tazewell | 728 | 703 | 694 |
| Greenfield | City | Greene | 1,179 | 1,123 | 1,073 |
| Greenup | Village | Cumberland | 1,532 | 1,485 | 1,477 |
| Greenview | Village | Menard | 862 | 816 | 789 |
| Greenville | City | Bond | 7,050 | 7,387 | 7,379 |
| Greenwood | Village | McHenry | 248 | 253 | 255 |
| Gridley | Village | McLean | 1,417 | 1,400 | 1,429 |
| Griggsville | City | Pike | 1,258 | 1,204 | 1,172 |
| Gulf Port | Village | Henderson | 207 | 216 | 214 |
| Gurnee | Village | Lake | 28,796 | 30,183 | 30,608 |
| Hainesville | Village | Lake | 2,074 | 3,733 | 3,699 |
| Hamburg | Village | Calhoun | 126 | 124 | 122 |
| Hamel | Village | Madison | 570 | 676 | 769 |
| Hamilton | City | Hancock | 3,029 | 2,855 | 2,777 |
| Hammond | Village | Piatt | 518 | 517 | 508 |
| Hampshire | Village | Kane | 2,972 | 3,871 | 5,569 |
| Hampton | Village | Rock Island | 1,626 | 1,710 | 1,774 |
| Hanaford | Village | Franklin | 214 | 220 | 221 |
| Hanna City | Village | Peoria | 1,013 | 989 | 977 |
| Hanover | Village | Jo Daviess | 857 | 823 | 793 |
| Hanover Park | Village | 38,278 | 37,233 | 36,777 | |
| Hardin | Village | Calhoun | 959 | 947 | 935 |
| Harmon | Village | Lee | 149 | 146 | 144 |
| Harrisburg | City | Saline | 9,872 | 9,651 | 9,582 |
| Harristown | Village | Macon | 1,345 | 1,269 | 1,244 |
| Hartford | Village | Madison | 1,545 | 1,508 | 1,477 |
| Hartsburg | Village | Logan | 358 | 341 | 330 |
| Harvard | City | McHenry | 8,056 | 8,833 | 9,855 |
| Harvel | Village | 235 | 231 | 227 | |
| Harvey | City | Cook | 30,000 | 28,920 | 28,056 |
| Harwood Heights | Village | Cook | 8,297 | 8,227 | 8,058 |
| Havana | City | Mason | 3,577 | 3,462 | 3,328 |
| Hawthorn Woods | Village | Lake | 6,126 | 6,786 | 8,067 |
| Hazel Crest | Village | Cook | 14,816 | 14,500 | 14,075 |
| Hebron | Village | McHenry | 1,133 | 1,207 | 1,401 |
| Hecker | Village | 475 | 488 | 489 | |
| Henderson | Village | Knox | 319 | 304 | 295 |
| Hennepin | Village | Putnam | 707 | 696 | 704 |
| Henning | Village | Vermilion | 241 | 236 | 229 |
| Henry | City | Marshall | 2,540 | 2,501 | 2,415 |
| Herrick | Village | Shelby | 524 | 517 | 498 |
| Herrin | City | Williamson | 11,473 | 11,677 | 12,337 |
| Herscher | Village | Kankakee | 1,524 | 1,565 | 1,615 |
| Hettick | Village | Macoupin | 182 | 180 | 175 |
| Heyworth | Village | McLean | 2,447 | 2,500 | 2,602 |
| Hickory Hills | City | Cook | 13,926 | 13,599 | 13,326 |
| Hidalgo | Village | Jasper | 123 | 121 | 118 |
| Highland | City | Madison | 8,500 | 9,061 | 9,748 |
| Highland Park | City | Lake | 30,257 | 30,895 | 31,449 |
| Highwood | City | Lake | 5,470 | 5,438 | 5,388 |
| Hillcrest | Village | Ogle | 1,158 | 1,276 | 1,288 |
| Hillsboro | City | Montgomery | 6,373 | 6,245 | 6,164 |
| Hillsdale | Village | Rock Island | 588 | 569 | 561 |
| Hillside | Village | Cook | 8,155 | 7,829 | 8,341 |
| Hillview | Village | Greene | 179 | 174 | 166 |
| Hinckley | Village | DeKalb | 1,994 | 2,054 | 2,081 |
| Hindsboro | Village | Douglas | 361 | 346 | 334 |
| Hinsdale | Village | 17,441 | 17,632 | 18,439 | |
| Hodgkins | Village | Cook | 2,134 | 2,085 | 2,014 |
| Hoffman | Village | Clinton | 466 | 460 | 449 |
| Hoffman Estates | Village | 49,666 | 51,496 | 53,641 | |
| Holiday Hills | Village | McHenry | 790 | 770 | 772 |
| Hollowayville | Village | Bureau | 91 | 88 | 87 |
| Homer | Village | Champaign | 1,200 | 1,167 | 1,122 |
| Homer Glen | Village | 22,202 | 23,970 | 26,111 | |
| Hometown | City | Cook | 4,467 | 4,276 | 4,112 |
| Homewood | Village | Cook | 19,543 | 19,039 | 18,475 |
| Hoopeston | City | Vermilion | 5,995 | 5,800 | 5,656 |
| Hooppole | Village | Henry | 162 | 154 | 152 |
| Hopedale | Village | Tazewell | 929 | 912 | 924 |
| Hopewell | Village | Marshall | 396 | 425 | 439 |
| Hopkins Park | Village | Kankakee | 711 | 797 | 791 |
| Hoyleton | Village | Washington | 520 | 501 | 492 |
| Hudson | Village | McLean | 1,512 | 1,629 | 1,794 |
| Huey | Village | Clinton | 196 | 188 | 185 |
| Hull | Village | Pike | 474 | 449 | 436 |
| Humboldt | Village | Coles | 481 | 480 | 466 |
| Hume | Village | Edgar | 380 | 370 | 362 |
| Huntley | Village | 5,743 | 15,066 | 22,923 | |
| Hurst | City | Williamson | 805 | 790 | 787 |
| Hutsonville | Village | Crawford | 633 | 609 | 606 |
| Illiopolis | Village | Sangamon | 916 | 877 | 849 |
| Ina | Village | Jefferson | 2,455 | 2,484 | 2,448 |
| Indian Creek | Village | Lake | 194 | 456 | 602 |
| Indian Head Park | Village | Cook | 3,685 | 3,678 | 3,614 |
| Indianola | Village | Vermilion | 224 | 224 | 220 |
| Industry | Village | McDonough | 545 | 513 | 491 |
| Inverness | Village | Cook | 6,987 | 7,211 | 7,673 |
| Iola | Village | Clay | 171 | 167 | 164 |
| Ipava | Village | Fulton | 506 | 484 | 470 |
| Iroquois | Village | Iroquois | 207 | 198 | 196 |
| Irving | Village | Montgomery | 495 | 490 | 479 |
| Irvington | Village | Washington | 736 | 705 | 700 |
| Irwin | Village | Kankakee | 92 | 89 | 89 |
| Island Lake | Village | 8,162 | 8,361 | 8,588 | |
| Itasca | Village | DuPage | 8,351 | 8,426 | 8,617 |
| Iuka | Village | Marion | 598 | 581 | 572 |
| Ivesdale | Village | 288 | 284 | 272 | |
| Jacksonville | City | Morgan | 20,000 | 19,720 | 19,415 |
| Jeffersonville | Village | Wayne | 366 | 358 | 353 |
| Jeisyville | Village | Christian | 128 | 125 | 122 |
| Jerome | Village | Sangamon | 1,414 | 1,340 | 1,294 |
| Jerseyville | City | Jersey | 8,025 | 8,023 | 8,373 |
| Jewett | Village | Cumberland | 232 | 226 | 223 |
| Johnsburg | Village | McHenry | 5,423 | 6,151 | 6,734 |
| Johnsonville | Village | Wayne | 69 | 67 | 66 |
| Johnston City | City | Williamson | 3,558 | 3,497 | 3,477 |
| Joliet | City | 107,127 | 128,447 | 146,125 | |
| Jonesboro | City | Union | 1,853 | 1,829 | 1,818 |
| Joppa | Village | Massac | 409 | 417 | 406 |
| Joy | Village | Mercer | 373 | 360 | 348 |
| Junction | Village | Gallatin | 139 | 132 | 129 |
| Junction City | Village | Marion | 559 | 546 | 537 |
| Justice | Village | Cook | 12,200 | 12,608 | 12,452 |
| Kampsville | Village | Calhoun | 302 | 298 | 293 |
| Kane | Village | Greene | 459 | 448 | 427 |
| Kaneville | Village | Kane | 446 | 575 | 608 |
| Kangley | Village | La Salle | 287 | 275 | 271 |
| Kankakee | City | Kankakee | 27,650 | 26,902 | 26,710 |
| Kansas | Village | Edgar | 842 | 820 | 804 |
| Kappa | Village | Woodford | 172 | 182 | 215 |
| Karnak | Village | Pulaski | 619 | 583 | 540 |
| Kaskaskia | Village | Randolph | 9 | 9 | 9 |
| Keenes | Village | Wayne | 99 | 97 | 95 |
| Keensburg | Village | Wabash | 254 | 249 | 239 |
| Keithsburg | City | Mercer | 714 | 705 | 688 |
| Kell | Village | Marion | 231 | 224 | 221 |
| Kempton | Village | Ford | 235 | 234 | 230 |
| Kenilworth | Village | Cook | 2,494 | 2,446 | 2,397 |
| Kenney | Village | De Witt | 374 | 362 | 355 |
| Kewanee | City | Henry | 12,980 | 12,548 | 12,302 |
| Keyesport | Village | 481 | 478 | 466 | |
| Kilbourne | Village | Mason | 375 | 365 | 350 |
| Kildeer | Village | Lake | 3,515 | 3,982 | 4,126 |
| Kincaid | Village | Christian | 1,442 | 1,452 | 1,450 |
| Kinderhook | Village | Pike | 249 | 239 | 231 |
| Kingston | Village | DeKalb | 980 | 1,025 | 1,060 |
| Kingston Mines | Village | Peoria | 259 | 251 | 252 |
| Kinmundy | City | Marion | 892 | 866 | 854 |
| Kinsman | Village | Grundy | 109 | 106 | 110 |
| Kirkland | Village | DeKalb | 1,166 | 1,469 | 1,697 |
| Kirkwood | Village | Warren | 794 | 732 | 707 |
| Knoxville | City | Knox | 3,178 | 3,001 | 2,917 |
| La Fayette | Village | Stark | 227 | 220 | 219 |
| La Grange | Village | Cook | 15,608 | 15,499 | 15,244 |
| La Grange Park | Village | Cook | 13,295 | 12,809 | 12,404 |
| La Harpe | City | Hancock | 1,385 | 1,327 | 1,287 |
| La Moille | Village | Bureau | 773 | 750 | 743 |
| La Prairie | Village | Adams | 60 | 59 | 58 |
| La Rose | Village | Marshall | 159 | 150 | 144 |
| Lacon | City | Marshall | 1,979 | 1,901 | 1,832 |
| Ladd | Village | Bureau | 1,311 | 1,290 | 1,274 |
| Lake Barrington | Village | Lake | 4,749 | 4,973 | 4,975 |
| Lake Bluff | Village | Lake | 6,056 | 6,169 | 6,222 |
| Lake Forest | City | Lake | 20,081 | 20,508 | 20,990 |
| Lake in the Hills | Village | McHenry | 23,619 | 28,221 | 29,698 |
| Lake Ka-ho | Village | 251 | 249 | 244 | |
| Lake Villa | Village | Lake | 5,935 | 8,260 | 8,709 |
| Lake Zurich | Village | Lake | 18,650 | 19,504 | 20,610 |
| Lakemoor | Village | 2,833 | 4,791 | 5,748 | |
| Lakewood | Village | McHenry | 2,333 | 3,207 | 3,690 |
| Lanark | City | Carroll | 1,591 | 1,505 | 1,457 |
| Lansing | Village | Cook | 28,343 | 27,468 | 26,672 |
| LaSalle | City | La Salle | 9,918 | 9,594 | 9,520 |
| Latham | Village | Logan | 371 | 356 | 343 |
| Lawrenceville | City | Lawrence | 4,750 | 4,511 | 4,382 |
| Le Roy | City | McLean | 3,335 | 3,404 | 3,527 |
| Leaf River | Village | Ogle | 555 | 545 | 541 |
| Lebanon | City | St. Clair | 3,557 | 3,737 | 4,477 |
| Lee | Village | 313 | 310 | 313 | |
| Leland | Village | La Salle | 970 | 936 | 962 |
| Leland Grove | City | Sangamon | 1,592 | 1,508 | 1,443 |
| Lemont | Village | 13,311 | 14,816 | 16,176 | |
| Lena | Village | Stephenson | 2,887 | 2,834 | 2,786 |
| Lenzburg | Village | St. Clair | 577 | 555 | 530 |
| Leonore | Village | La Salle | 110 | 110 | 108 |
| Lerna | Village | Coles | 322 | 321 | 312 |
| Lewistown | City | Fulton | 2,523 | 2,432 | 2,374 |
| Lexington | City | McLean | 1,912 | 1,885 | 1,899 |
| Liberty | Village | Adams | 519 | 512 | 510 |
| Libertyville | Village | Lake | 20,773 | 21,449 | 21,843 |
| Lily Lake | Village | Kane | 836 | 909 | 925 |
| Lima | Village | Adams | 159 | 157 | 156 |
| Limestone | Village | Kankakee | 1,640 | 1,660 | 1,659 |
| Lincoln | City | Logan | 15,382 | 14,889 | 14,541 |
| Lincolnshire | Village | Lake | 6,118 | 6,471 | 7,960 |
| Lincolnwood | Village | Cook | 12,359 | 12,054 | 11,810 |
| Lindenhurst | Village | Lake | 12,616 | 14,218 | 14,695 |
| Lisbon | Village | Kendall | 278 | 287 | 335 |
| Lisle | Village | DuPage | 22,539 | 22,940 | 23,135 |
| Litchfield | City | Montgomery | 6,974 | 6,783 | 6,647 |
| Little York | Village | Warren | 269 | 254 | 247 |
| Littleton | Village | Schuyler | 197 | 192 | 189 |
| Liverpool | Village | Fulton | 119 | 116 | 113 |
| Livingston | Village | Madison | 825 | 805 | 787 |
| Loami | Village | Sangamon | 804 | 786 | 781 |
| Lockport | City | Will | 15,425 | 20,555 | 24,810 |
| Loda | Village | Iroquois | 419 | 407 | 404 |
| Lomax | Village | Henderson | 477 | 448 | 422 |
| Lombard | Village | DuPage | 42,709 | 42,970 | 42,890 |
| London Mills | Village | 447 | 436 | 423 | |
| Long Creek | Village | Macon | 1,364 | 1,314 | 1,318 |
| Long Grove | Village | Lake | 6,735 | 7,608 | 8,101 |
| Long Point | Village | Livingston | 247 | 241 | 232 |
| Longview | Village | Champaign | 153 | 150 | 144 |
| Loraine | Village | Adams | 363 | 357 | 355 |
| Lostant | Village | La Salle | 486 | 477 | 472 |
| Louisville | Village | Clay | 1,280 | 1,253 | 1,235 |
| Loves Park | City | 20,213 | 22,491 | 24,457 | |
| Lovington | Village | Moultrie | 1,222 | 1,190 | 1,170 |
| Ludlow | Village | Champaign | 373 | 375 | 361 |
| Lyndon | Village | Whiteside | 566 | 547 | 543 |
| Lynnville | Village | Morgan | 137 | 136 | 133 |
| Lynwood | Village | Cook | 7,958 | 8,123 | 8,519 |
| Lyons | Village | Cook | 10,255 | 10,440 | 10,250 |
| Macedonia | Village | 51 | 50 | 50 | |
| Machesney Park | Village | Winnebago | 20,754 | 21,318 | 22,815 |
| Mackinaw | Village | Tazewell | 1,572 | 1,604 | 1,715 |
| Macomb | City | McDonough | 18,456 | 19,194 | 19,736 |
| Macon | City | Macon | 1,213 | 1,143 | 1,133 |
| Madison | City | 4,545 | 4,443 | 4,554 | |
| Maeystown | Village | Monroe | 146 | 152 | 151 |
| Magnolia | Village | Putnam | 279 | 273 | 272 |
| Mahomet | Village | Champaign | 5,018 | 5,606 | 6,422 |
| Makanda | Village | Jackson | 419 | 423 | 408 |
| Malden | Village | Bureau | 343 | 334 | 331 |
| Malta | Village | DeKalb | 976 | 976 | 1,192 |
| Manchester | Village | Scott | 354 | 344 | 331 |
| Manhattan | Village | Will | 3,378 | 4,422 | 7,166 |
| Manito | Village | Mason | 1,736 | 1,693 | 1,631 |
| Manlius | Village | Bureau | 355 | 344 | 340 |
| Mansfield | Village | Piatt | 949 | 927 | 910 |
| Manteno | Village | Kankakee | 6,487 | 7,664 | 8,562 |
| Maple Park | Village | 765 | 1,107 | 1,290 | |
| Mapleton | Village | Peoria | 246 | 238 | 236 |
| Maquon | Village | Knox | 318 | 296 | 286 |
| Marengo | City | McHenry | 6,373 | 7,184 | 7,520 |
| Marietta | Village | Fulton | 150 | 147 | 142 |
| Marine | Village | Madison | 918 | 947 | 935 |
| Marion | City | Williamson | 16,196 | 16,935 | 17,388 |
| Marissa | Village | St. Clair | 2,141 | 2,059 | 1,982 |
| Mark | Village | Putnam | 495 | 482 | 514 |
| Markham | City | Cook | 12,741 | 12,416 | 12,248 |
| Maroa | City | Macon | 1,654 | 1,562 | 1,538 |
| Marquette Heights | City | Tazewell | 2,794 | 2,819 | 2,831 |
| Marseilles | City | La Salle | 4,661 | 4,810 | 4,924 |
| Marshall | City | Clark | 3,900 | 3,799 | 3,846 |
| Martinsville | City | Clark | 1,225 | 1,215 | 1,212 |
| Martinton | Village | Iroquois | 375 | 379 | 383 |
| Maryville | Village | Madison | 4,844 | 6,246 | 7,397 |
| Mascoutah | City | St. Clair | 5,771 | 5,801 | 6,701 |
| Mason | Town | Effingham | 402 | 406 | 397 |
| Mason City | City | Mason | 2,558 | 2,470 | 2,365 |
| Matherville | Village | Mercer | 772 | 774 | 749 |
| Matteson | Village | 12,950 | 14,616 | 17,420 | |
| Mattoon | City | Coles | 18,291 | 17,699 | 17,177 |
| Maunie | Village | White | 177 | 174 | 170 |
| Maywood | Village | Cook | 26,980 | 25,975 | 25,035 |
| Mazon | Village | Grundy | 904 | 891 | 1,014 |
| McClure | Village | 423 | 413 | 376 | |
| McCook | Village | Cook | 254 | 243 | 237 |
| McCullom Lake | Village | McHenry | 1,038 | 1,019 | 1,100 |
| McHenry | City | McHenry | 21,743 | 23,992 | 26,862 |
| McLean | Village | McLean | 808 | 794 | 791 |
| McLeansboro | City | Hamilton | 2,949 | 2,832 | 2,780 |
| McNabb | Village | Putnam | 310 | 290 | 282 |
| Mechanicsburg | Village | Sangamon | 478 | 467 | 449 |
| Media | Village | Henderson | 130 | 122 | 114 |
| Medora | Village | Macoupin | 501 | 494 | 481 |
| Melrose Park | Village | Cook | 23,188 | 22,663 | 21,853 |
| Melvin | Village | Ford | 465 | 462 | 456 |
| Mendon | Village | Adams | 1,027 | 1,014 | 1,009 |
| Mendota | City | La Salle | 7,283 | 7,081 | 6,995 |
| Menominee | Village | Jo Daviess | 214 | 210 | 205 |
| Meredosia | Village | Morgan | 1,041 | 995 | 966 |
| Merrionette Park | Village | Cook | 1,999 | 2,031 | 1,982 |
| Metamora | Village | Woodford | 2,733 | 2,872 | 3,398 |
| Metcalf | Village | Edgar | 213 | 208 | 203 |
| Metropolis | City | Massac | 6,593 | 6,497 | 6,540 |
| Mettawa | Village | Lake | 367 | 436 | 514 |
| Middletown | Village | Logan | 434 | 431 | 416 |
| Midlothian | Village | Cook | 14,335 | 14,037 | 13,657 |
| Milan | Village | Rock Island | 5,376 | 5,220 | 5,186 |
| Milford | Village | Iroquois | 1,369 | 1,304 | 1,283 |
| Mill Creek | Village | Union | 76 | 76 | 75 |
| Mill Shoals | Village | 235 | 231 | 225 | |
| Millbrook | Village | 287 | 296 | 327 | |
| Milledgeville | Village | Carroll | 1,014 | 958 | 930 |
| Millington | Village | 478 | 483 | 509 | |
| Millstadt | Village | St. Clair | 2,920 | 3,092 | 3,348 |
| Milton | Village | Pike | 274 | 263 | 254 |
| Mineral | Village | Bureau | 272 | 264 | 261 |
| Minier | Village | Tazewell | 1,244 | 1,253 | 1,247 |
| Minonk | City | Woodford | 2,168 | 2,140 | 2,154 |
| Minooka | Village | 4,048 | 6,430 | 10,514 | |
| Modesto | Village | Macoupin | 252 | 249 | 243 |
| Mokena | Village | Will | 14,639 | 16,530 | 19,236 |
| Moline | City | Rock Island | 44,025 | 42,893 | 43,088 |
| Momence | City | Kankakee | 3,296 | 3,214 | 3,188 |
| Monee | Village | Will | 2,969 | 4,470 | 4,993 |
| Monmouth | City | Warren | 9,846 | 9,370 | 9,321 |
| Monroe Center | Village | 494 | 499 | 498 | |
| Montgomery | Village | 5,578 | 10,461 | 15,229 | |
| Monticello | City | Piatt | 5,139 | 5,155 | 5,350 |
| Montrose | Village | 260 | 263 | 257 | |
| Morris | City | Grundy | 11,993 | 12,484 | 13,812 |
| Morrison | City | Whiteside | 4,458 | 4,315 | 4,303 |
| Morrisonville | Village | Christian | 1,068 | 1,047 | 1,020 |
| Morton | Village | Tazewell | 15,441 | 15,695 | 16,039 |
| Morton Grove | Village | Cook | 22,451 | 22,298 | 22,478 |
| Mound City | City | Pulaski | 692 | 641 | 590 |
| Mound Station | Village | Brown | 127 | 123 | 117 |
| Mounds | City | Pulaski | 1,117 | 1,012 | 949 |
| Mount Auburn | Village | Christian | 515 | 532 | 542 |
| Mount Carmel | City | Wabash | 8,006 | 7,636 | 7,404 |
| Mount Carroll | City | Carroll | 1,836 | 1,733 | 1,659 |
| Mount Clare | Village | Macoupin | 433 | 428 | 421 |
| Mount Erie | Village | Wayne | 105 | 102 | 101 |
| Mount Morris | Village | Ogle | 3,033 | 3,026 | 3,078 |
| Mount Olive | City | Macoupin | 2,150 | 2,090 | 2,052 |
| Mount Prospect | Village | Cook | 56,271 | 54,819 | 53,338 |
| Mount Pulaski | City | Logan | 1,701 | 1,634 | 1,580 |
| Mount Sterling | City | Brown | 2,070 | 1,985 | 1,907 |
| Mount Vernon | City | Jefferson | 16,351 | 16,202 | 16,298 |
| Mount Zion | Village | Macon | 4,875 | 4,913 | 5,159 |
| Moweaqua | Village | 1,934 | 1,849 | 1,821 | |
| Muddy | Village | Saline | 79 | 74 | 73 |
| Mulberry Grove | Village | Bond | 672 | 674 | 658 |
| Muncie | Village | Vermilion | 155 | 151 | 147 |
| Mundelein | Village | Lake | 30,994 | 32,344 | 33,717 |
| Murphysboro | City | Jackson | 8,715 | 8,492 | 8,184 |
| Murrayville | Village | Morgan | 644 | 636 | 619 |
| Naperville | City | 128,582 | 139,160 | 143,117 | |
| Naplate | Village | La Salle | 523 | 520 | 512 |
| Naples | Town | Scott | 131 | 128 | 123 |
| Nashville | City | Washington | 3,147 | 3,099 | 3,027 |
| Nason | City | Jefferson | 234 | 236 | 234 |
| Nauvoo | City | Hancock | 1,071 | 1,165 | 1,155 |
| Nebo | Village | Pike | 408 | 389 | 377 |
| Nelson | Village | Lee | 163 | 160 | 157 |
| Neoga | City | Cumberland | 1,854 | 1,768 | 1,753 |
| Neponset | Village | Bureau | 519 | 499 | 493 |
| New Athens | Village | St. Clair | 1,981 | 1,998 | 1,999 |
| New Baden | Village | 3,010 | 3,049 | 3,248 | |
| New Bedford | Village | Bureau | 95 | 92 | 91 |
| New Berlin | Village | Sangamon | 1,032 | 1,141 | 1,131 |
| New Boston | City | Mercer | 632 | 634 | 616 |
| New Burnside | Village | Johnson | 242 | 248 | 252 |
| New Canton | Town | Pike | 417 | 399 | 385 |
| New Douglas | Village | Madison | 333 | 335 | 347 |
| New Grand Chain | Village | Pulaski | 233 | 219 | 203 |
| New Haven | Village | Gallatin | 477 | 453 | 442 |
| New Holland | Village | Logan | 318 | 315 | 304 |
| New Lenox | Village | Will | 18,052 | 22,329 | 24,137 |
| New Millford | Village | Winnebago | 541 | 549 | 556 |
| New Minden | Village | Washington | 204 | 200 | 193 |
| New Salem | Village | Pike | 136 | 130 | 126 |
| Newark | Village | Kendall | 887 | 1,010 | 1,128 |
| Newman | City | Douglas | 956 | 928 | 912 |
| Newton | City | Jasper | 3,069 | 3,008 | 2,942 |
| Niantic | Village | Macon | 738 | 688 | 667 |
| Niles | Village | Cook | 30,068 | 29,508 | 28,666 |
| Nilwood | Town | Macoupin | 284 | 281 | 274 |
| Noble | Village | Richland | 746 | 717 | 691 |
| Nokomis | City | Montgomery | 2,389 | 2,304 | 2,259 |
| Nora | Village | Jo Daviess | 118 | 117 | 113 |
| Normal | Town | McLean | 45,464 | 49,299 | 52,056 |
| Norridge | Village | Cook | 14,582 | 14,107 | 13,954 |
| Norris | Village | Fulton | 194 | 189 | 184 |
| Norris City | Village | White | 1,061 | 1,039 | 1,015 |
| North Aurora | Village | Kane | 10,727 | 13,677 | 15,812 |
| North Barrington | Village | Lake | 2,938 | 3,180 | 3,237 |
| North Chicago | City | Lake | 35,919 | 33,133 | 32,608 |
| North City | Village | Franklin | 630 | 632 | 653 |
| North Henderson | Village | Mercer | 187 | 186 | 181 |
| North Pekin | Village | Tazewell | 1,603 | 1,614 | 1,721 |
| North Riverside | Village | Cook | 6,688 | 6,432 | 6,240 |
| North Utica | Village | La Salle | 974 | 981 | 1,039 |
| Northbrook | Village | Cook | 33,525 | 34,136 | 33,936 |
| Northfield | Village | Cook | 5,521 | 5,530 | 5,429 |
| Northlake | City | Cook | 11,895 | 11,430 | 11,462 |
| Norwood | Village | Peoria | 473 | 462 | 456 |
| O'Fallon | City | St. Clair | 22,187 | 24,959 | 27,540 |
| Oak Brook | Village | 8,634 | 8,786 | 8,803 | |
| Oak Forest | City | Cook | 28,091 | 27,985 | 27,740 |
| Oak Grove | Village | Rock Island | 728 | 714 | 699 |
| Oak Lawn | Village | Cook | 55,245 | 54,051 | 53,244 |
| Oak Park | Village | Cook | 52,524 | 50,795 | 49,557 |
| Oakbrook Terrace | City | DuPage | 2,093 | 2,049 | 2,221 |
| Oakdale | Village | Washington | 213 | 208 | 201 |
| Oakford | Village | Menard | 309 | 301 | 292 |
| Oakland | City | Coles | 996 | 961 | 934 |
| Oakwood | Village | Vermilion | 1,502 | 1,466 | 1,426 |
| Oakwood Hills | Village | McHenry | 2,198 | 2,308 | 2,376 |
| Oblong | Village | Crawford | 1,580 | 1,546 | 1,523 |
| Oconee | Village | Shelby | 202 | 191 | 184 |
| Odell | Village | Livingston | 1,014 | 996 | 992 |
| Odin | Village | Marion | 1,122 | 1,082 | 1,061 |
| Ogden | Village | Champaign | 747 | 746 | 719 |
| Oglesby | City | La Salle | 3,647 | 3,583 | 3,671 |
| Ohio | Village | Bureau | 540 | 524 | 518 |
| Ohlman | Village | 75 | 144 | 145 | |
| Okawville | Village | Washington | 1,355 | 1,338 | 1,337 |
| Old Mill Creek | Village | Lake | 251 | 251 | 263 |
| Old Ripley | Village | Bond | 127 | 127 | 124 |
| Old Shawneetown | Village | Gallatin | 278 | 266 | 258 |
| Olmsted | Village | Pulaski | 299 | 282 | 261 |
| Olney | City | Richland | 8,798 | 8,606 | 8,407 |
| Olympia Fields | Village | Cook | 4,732 | 4,666 | 4,735 |
| Omaha | Village | Gallatin | 263 | 249 | 244 |
| Onarga | Village | Iroquois | 1,438 | 1,386 | 1,376 |
| Oneida | City | Knox | 752 | 716 | 692 |
| Oquawka | Village | Henderson | 1,539 | 1,469 | 1,378 |
| Orangeville | Village | Stephenson | 751 | 764 | 759 |
| Oreana | Village | Macon | 892 | 927 | 924 |
| Oregon | City | Ogle | 4,060 | 4,112 | 4,123 |
| Orient | City | Franklin | 305 | 310 | 312 |
| Orion | Village | Henry | 1,714 | 1,679 | 1,688 |
| Orland Hills | Village | Cook | 6,781 | 7,317 | 7,195 |
| Orland Park | Village | 51,170 | 54,605 | 55,514 | |
| Oswego | Village | Kendall | 13,540 | 21,057 | 31,504 |
| Ottawa | City | La Salle | 18,630 | 18,792 | 19,419 |
| Otterville | Town | Jersey | 120 | 121 | 119 |
| Owaneco | Village | Christian | 256 | 251 | 244 |
| Palatine | Village | Cook | 66,275 | 66,482 | 67,080 |
| Palestine | Village | Crawford | 1,376 | 1,345 | 1,324 |
| Palmer | Village | Christian | 248 | 239 | 232 |
| Palmyra | Village | Macoupin | 733 | 723 | 706 |
| Palos Heights | City | Cook | 11,261 | 12,396 | 12,469 |
| Palos Hills | City | Cook | 17,665 | 17,333 | 16,924 |
| Palos Park | Village | Cook | 4,835 | 4,850 | 4,877 |
| Pana | City | Christian | 5,944 | 5,856 | 5,718 |
| Panama | Village | 323 | 323 | 316 | |
| Panola | Village | Woodford | 33 | 33 | 33 |
| Papineau | Village | Iroquois | 196 | 197 | 199 |
| Paris | City | Edgar | 9,225 | 8,866 | 8,699 |
| Park City | City | Lake | 6,644 | 6,712 | 6,609 |
| Park Forest | Village | 23,476 | 23,108 | 22,583 | |
| Park Ridge | City | Cook | 37,775 | 37,045 | 36,927 |
| Parkersburg | Village | Richland | 234 | 230 | 222 |
| Patoka | Village | Marion | 633 | 614 | 606 |
| Paw Paw | Village | Lee | 852 | 837 | 876 |
| Pawnee | Village | Sangamon | 2,647 | 2,578 | 2,544 |
| Paxton | City | Ford | 4,599 | 4,529 | 4,521 |
| Payson | Village | Adams | 1,066 | 1,052 | 1,048 |
| Pearl | Village | Pike | 187 | 179 | 173 |
| Pearl City | Village | Stephenson | 785 | 784 | 771 |
| Pecatonica | Village | Winnebago | 1,997 | 2,134 | 2,209 |
| Pekin | City | 33,901 | 33,059 | 33,430 | |
| Peoria | City | Peoria | 113,109 | 112,729 | 114,114 |
| Peoria Heights | Village | 6,629 | 6,332 | 6,230 | |
| Peotone | Village | Will | 3,394 | 3,829 | 4,294 |
| Percy | Village | Randolph | 966 | 944 | 910 |
| Perry | Village | Pike | 437 | 414 | 399 |
| Peru | City | La Salle | 9,872 | 9,777 | 9,810 |
| Pesotum | Village | Champaign | 521 | 507 | 499 |
| Petersburg | City | Menard | 2,298 | 2,263 | 2,190 |
| Phillipstown | Village | White | 28 | 28 | 27 |
| Philo | Village | Champaign | 1,314 | 1,495 | 1,608 |
| Phoenix | Village | Cook | 2,157 | 2,081 | 2,041 |
| Pierron | Village | 649 | 653 | 646 | |
| Pinckneyville | City | Perry | 5,490 | 5,420 | 5,384 |
| Pingree Grove | Village | Kane | 185 | 194 | 4,075 |
| Piper City | Village | Ford | 781 | 749 | 736 |
| Pittsburg | Village | Williamson | 573 | 584 | 581 |
| Pittsfield | City | Pike | 4,628 | 4,463 | 4,453 |
| Plainfield | Village | Will | 13,261 | 24,663 | 36,507 |
| Plainville | Village | Adams | 248 | 244 | 242 |
| Plano | City | Kendall | 5,765 | 5,885 | 11,886 |
| Plattville | Village | Kendall | 225 | 232 | 255 |
| Pleasant Hill | Village | Pike | 1,047 | 1,003 | 970 |
| Pleasant Plains | Village | Sangamon | 777 | 748 | 720 |
| Plymouth | Village | 562 | 538 | 520 | |
| Pocahontas | Village | Bond | 732 | 733 | 717 |
| Polo | City | Ogle | 2,477 | 2,472 | 2,477 |
| Pontiac | City | Livingston | 11,981 | 11,441 | 11,258 |
| Pontoon Beach | Village | Madison | 5,735 | 6,044 | 6,081 |
| Pontoosuc | Village | Hancock | 171 | 164 | 159 |
| Poplar Grove | Village | Boone | 1,840 | 2,635 | 4,058 |
| Port Barrington | Village | 840 | 1,355 | 1,437 | |
| Port Byron | Village | Rock Island | 1,540 | 1,596 | 1,670 |
| Posen | Village | Cook | 4,730 | 4,859 | 4,907 |
| Potomac | Village | Vermilion | 681 | 663 | 656 |
| Prairie City | Village | McDonough | 461 | 436 | 418 |
| Prairie du Rocher | Village | Randolph | 613 | 592 | 568 |
| Prairie Grove | Village | McHenry | 1,010 | 1,666 | 1,995 |
| Princeton | City | Bureau | 7,509 | 7,437 | 7,496 |
| Princeville | Village | Peoria | 1,666 | 1,610 | 1,636 |
| Prophetstown | City | Whiteside | 2,023 | 1,960 | 1,925 |
| Prospect Heights | City | Cook | 17,061 | 16,480 | 16,047 |
| Pulaski | Village | Pulaski | 274 | 249 | 228 |
| Quincy | City | Adams | 40,740 | 39,698 | 39,983 |
| Radom | Village | Washington | 395 | 390 | 383 |
| Raleigh | Village | Saline | 330 | 322 | 319 |
| Ramsey | Village | Fayette | 1,056 | 1,051 | 1,047 |
| Rankin | Village | Vermilion | 617 | 597 | 584 |
| Ransom | Village | La Salle | 409 | 391 | 383 |
| Rantoul | Village | Champaign | 12,921 | 12,675 | 12,189 |
| Rapids City | Village | Rock Island | 955 | 968 | 990 |
| Raritan | Village | Henderson | 140 | 131 | 122 |
| Raymond | Village | Montgomery | 927 | 917 | 899 |
| Red Bud | City | Randolph | 3,454 | 3,514 | 3,636 |
| Reddick | Village | 227 | 226 | 225 | |
| Redmon | Village | Edgar | 199 | 194 | 189 |
| Reynolds | Village | 508 | 492 | 482 | |
| Richmond | Village | McHenry | 1,170 | 1,800 | 2,316 |
| Richton Park | Village | Cook | 12,547 | 12,844 | 12,842 |
| Richview | Village | Washington | 308 | 296 | 286 |
| Ridge Farm | Village | Vermilion | 912 | 880 | 857 |
| Ridgway | Village | Gallatin | 928 | 879 | 860 |
| Ridott | Village | Stephenson | 159 | 153 | 147 |
| Ringwood | Village | McHenry | 475 | 483 | 489 |
| Rio | Village | Knox | 240 | 229 | 221 |
| Ripley | Village | Brown | 103 | 98 | 93 |
| River Forest | Village | Cook | 11,635 | 11,263 | 11,176 |
| River Grove | Village | Cook | 10,668 | 10,253 | 9,992 |
| Riverdale | Village | Cook | 15,055 | 14,702 | 14,163 |
| Riverside | Village | Cook | 8,895 | 8,545 | 8,272 |
| Riverton | Village | Sangamon | 3,062 | 3,094 | 2,989 |
| Riverwoods | Village | Lake | 3,843 | 4,039 | 4,081 |
| Roanoke | Village | Woodford | 1,994 | 1,975 | 2,017 |
| Robbins | Village | Cook | 6,635 | 6,412 | 6,331 |
| Roberts | Village | Ford | 387 | 385 | 380 |
| Robinson | City | Crawford | 6,831 | 6,481 | 6,369 |
| Rochelle | City | Ogle | 9,671 | 9,778 | 9,847 |
| Rochester | Village | Sangamon | 2,893 | 2,952 | 3,236 |
| Rock City | Village | Stephenson | 313 | 313 | 313 |
| Rock Falls | City | Whiteside | 9,593 | 9,352 | 9,307 |
| Rock Island | City | Rock Island | 39,732 | 38,657 | 38,139 |
| Rockbridge | Village | Greene | 189 | 185 | 176 |
| Rockdale | Village | Will | 1,883 | 1,953 | 1,993 |
| Rockford | City | Winnebago | 151,388 | 152,614 | 157,272 |
| Rockton | Village | Winnebago | 5,429 | 5,430 | 5,512 |
| Rockwood | Village | Randolph | 42 | 41 | 40 |
| Rolling Meadows | City | Cook | 24,665 | 23,958 | 23,463 |
| Romeoville | Village | Will | 21,209 | 35,188 | 38,028 |
| Roodhouse | City | Greene | 2,214 | 2,026 | 1,937 |
| Roscoe | Village | Winnebago | 6,277 | 7,868 | 8,807 |
| Rose Hill | Village | Jasper | 79 | 78 | 76 |
| Roselle | Village | 23,292 | 23,369 | 23,209 | |
| Rosemont | Village | Cook | 4,224 | 4,063 | 3,929 |
| Roseville | Village | Warren | 1,083 | 1,000 | 979 |
| Rosiclare | City | Hardin | 1,213 | 1,158 | 1,085 |
| Rossville | Village | Vermilion | 1,213 | 1,184 | 1,153 |
| Round Lake | Village | Lake | 5,881 | 12,201 | 16,748 |
| Round Lake Beach | Village | Lake | 25,873 | 27,942 | 27,855 |
| Round Lake Heights | Village | Lake | 1,337 | 2,620 | 2,802 |
| Round Lake Park | Village | Lake | 6,097 | 6,165 | 6,181 |
| Roxana | Village | Madison | 1,608 | 1,578 | 1,552 |
| Royal | Village | Champaign | 273 | 273 | 267 |
| Royal Lakes | Village | Macoupin | 190 | 189 | 184 |
| Royalton | Village | Franklin | 1,130 | 1,150 | 1,159 |
| Ruma | Village | Randolph | 281 | 277 | 285 |
| Rushville | City | Schuyler | 3,219 | 3,144 | 3,096 |
| Russellville | Village | Lawrence | 119 | 117 | 114 |
| Rutland | Village | La Salle | 354 | 354 | 348 |
| Sadorus | Village | Champaign | 427 | 410 | 395 |
| Sailor Springs | Village | Clay | 128 | 125 | 123 |
| Salem | City | Marion | 7,906 | 7,569 | 7,446 |
| San Jose | Village | 695 | 665 | 646 | |
| Sandoval | Village | Marion | 1,434 | 1,354 | 1,335 |
| Sandwich | City | 6,570 | 6,896 | 7,337 | |
| Sauget | Village | St. Clair | 249 | 244 | 237 |
| Sauk Village | Village | 10,411 | 10,450 | 10,254 | |
| Saunemin | Village | Livingston | 452 | 441 | 424 |
| Savanna | City | Carroll | 3,557 | 3,349 | 3,211 |
| Savoy | Village | Champaign | 4,483 | 4,805 | 5,579 |
| Sawyerville | Village | Macoupin | 295 | 291 | 284 |
| Saybrook | Village | McLean | 764 | 743 | 746 |
| Scales Mound | Village | Jo Daviess | 401 | 386 | 381 |
| Schaumburg | Village | 75,409 | 73,072 | 71,716 | |
| Schiller Park | Village | Cook | 11,850 | 11,681 | 11,573 |
| Schram City | Village | Montgomery | 653 | 627 | 614 |
| Sciota | Village | McDonough | 58 | 54 | 52 |
| Scottville | Village | Macoupin | 140 | 138 | 135 |
| Seaton | Village | Mercer | 242 | 232 | 226 |
| Seatonville | Village | Bureau | 303 | 297 | 308 |
| Secor | Village | Woodford | 379 | 370 | 372 |
| Seneca | Village | 2,053 | 2,039 | 2,126 | |
| Sesser | City | Franklin | 2,124 | 2,106 | 2,121 |
| Shabbona | Village | DeKalb | 936 | 943 | 957 |
| Shannon | Village | Carroll | 854 | 808 | 795 |
| Shawneetown | City | Gallatin | 1,410 | 1,338 | 1,308 |
| Sheffield | Village | Bureau | 946 | 941 | 935 |
| Shelbyville | City | Shelby | 4,975 | 4,733 | 4,605 |
| Sheldon | Village | Iroquois | 1,232 | 1,173 | 1,154 |
| Sheridan | Village | La Salle | 2,411 | 1,849 | 1,963 |
| Sherman | Village | Sangamon | 2,881 | 3,343 | 3,827 |
| Sherrard | Village | Mercer | 694 | 667 | 645 |
| Shiloh | Village | St. Clair | 8,546 | 10,226 | 11,173 |
| Shipman | Town | Macoupin | 655 | 648 | 634 |
| Shorewood | Village | Will | 7,960 | 10,989 | 15,521 |
| Shumway | Village | Effingham | 230 | 232 | 227 |
| Sibley | Village | Ford | 329 | 327 | 323 |
| Sidell | Village | Vermilion | 626 | 600 | 592 |
| Sidney | Village | Champaign | 1,067 | 1,098 | 1,127 |
| Sigel | Town | Shelby | 386 | 401 | 389 |
| Silvis | City | Rock Island | 7,279 | 7,369 | 7,770 |
| Simpson | Village | Johnson | 54 | 55 | 56 |
| Sims | Village | Wayne | 273 | 266 | 262 |
| Skokie | Village | Cook | 63,348 | 63,965 | 66,620 |
| Sleepy Hollow | Village | Kane | 3,561 | 3,676 | 3,687 |
| Smithboro | Village | Bond | 200 | 195 | 232 |
| Smithfield | Village | Fulton | 214 | 209 | 203 |
| Smithton | Village | St. Clair | 2,352 | 2,849 | 3,418 |
| Somonauk | Village | 1,434 | 1,640 | 1,651 | |
| Sorento | Village | Bond | 601 | 592 | 602 |
| South Barrington | Village | Cook | 3,768 | 3,910 | 4,461 |
| South Beloit | City | Winnebago | 5,492 | 5,481 | 5,541 |
| South Chicago Heights | Village | Cook | 3,970 | 3,896 | 3,779 |
| South Elgin | Village | Kane | 16,150 | 20,553 | 21,131 |
| South Holland | Village | Cook | 22,147 | 21,649 | 21,083 |
| South Jacksonville | Village | Morgan | 3,475 | 3,336 | 3,250 |
| South Pekin | Village | Tazewell | 1,162 | 1,167 | 1,198 |
| South Roxana | Village | Madison | 1,888 | 1,845 | 1,807 |
| South Wilmington | Village | Grundy | 621 | 609 | 636 |
| Southern View | Village | Sangamon | 1,794 | 1,710 | 1,642 |
| Sparland | Village | Marshall | 504 | 492 | 474 |
| Sparta | City | Randolph | 4,581 | 4,450 | 4,314 |
| Spaulding | Village | Sangamon | 573 | 742 | 821 |
| Spillertown | Village | Williamson | 219 | 224 | 223 |
| Spring Bay | Village | Woodford | 436 | 506 | 522 |
| Spring Grove | Village | McHenry | 3,948 | 5,108 | 5,769 |
| Spring Valley | City | Bureau | 5,447 | 5,326 | 5,450 |
| Springerton | Village | White | 134 | 131 | 128 |
| Springfield | City | Sangamon | 111,749 | 114,826 | 117,352 |
| St. Anne | Village | Kankakee | 1,230 | 1,235 | 1,247 |
| St. Augustine | Village | Knox | 152 | 142 | 137 |
| St. Charles | City | 28,033 | 32,134 | 32,829 | |
| St. David | Village | Fulton | 587 | 561 | 547 |
| St. Elmo | City | Fayette | 1,456 | 1,397 | 1,420 |
| St. Francisville | City | Lawrence | 759 | 746 | 728 |
| St. Jacob | Village | Madison | 961 | 1,054 | 1,081 |
| St. Johns | Village | Perry | 218 | 214 | 213 |
| St. Joseph | Village | Champaign | 2,943 | 3,457 | 4,023 |
| St. Libory | Village | St. Clair | 583 | 588 | 625 |
| St. Peter | Village | Fayette | 386 | 383 | 381 |
| Standard | Village | Putnam | 258 | 254 | 250 |
| Standard City | Village | Macoupin | 138 | 137 | 133 |
| Stanford | Village | McLean | 694 | 675 | 674 |
| Staunton | City | Macoupin | 5,142 | 5,118 | 5,139 |
| Ste. Marie | Village | Jasper | 261 | 257 | 251 |
| Steeleville | Village | Randolph | 2,077 | 2,048 | 2,014 |
| Steger | Village | 9,679 | 10,123 | 10,421 | |
| Sterling | City | Whiteside | 15,810 | 15,332 | 15,124 |
| Steward | Village | Lee | 271 | 265 | 261 |
| Stewardson | Village | Shelby | 747 | 724 | 712 |
| Stickney | Village | Cook | 6,148 | 5,934 | 5,774 |
| Stillman Valley | Village | Ogle | 1,048 | 1,070 | 1,108 |
| Stockton | Village | Jo Daviess | 1,946 | 1,851 | 1,797 |
| Stone Park | Village | Cook | 5,127 | 4,936 | 4,860 |
| Stonefort | Village | 292 | 292 | 291 | |
| Stonington | Village | Christian | 960 | 926 | 900 |
| Stoy | Village | Crawford | 119 | 116 | 115 |
| Strasburg | Village | Shelby | 603 | 583 | 563 |
| Strawn | Village | Livingston | 104 | 101 | 97 |
| Streamwood | Village | Cook | 36,430 | 36,983 | 37,119 |
| Streator | City | 14,193 | 13,892 | 13,780 | |
| Stronghurst | Village | Henderson | 896 | 845 | 795 |
| Sublette | Village | Lee | 456 | 448 | 442 |
| Sugar Grove | Village | Kane | 4,001 | 7,498 | 9,645 |
| Sullivan | City | Moultrie | 4,355 | 4,305 | 4,383 |
| Summerfield | Village | St. Clair | 472 | 491 | 473 |
| Summit | Village | Cook | 10,637 | 10,351 | 10,223 |
| Sumner | City | Lawrence | 1,022 | 2,429 | 2,981 |
| Sun River Terrace | Village | Kankakee | 446 | 445 | 526 |
| Swansea | Village | St. Clair | 10,940 | 11,858 | 12,927 |
| Sycamore | City | DeKalb | 12,421 | 14,001 | 17,679 |
| Symerton | Village | Will | 106 | 112 | 112 |
| Table Grove | Village | Fulton | 396 | 386 | 375 |
| Tallula | Village | Menard | 638 | 622 | 601 |
| Tamaroa | Village | Perry | 740 | 724 | 719 |
| Tamms | Village | Alexander | 1,192 | 984 | 916 |
| Tampico | Village | Whiteside | 772 | 745 | 728 |
| Taylor Springs | Village | Montgomery | 583 | 577 | 565 |
| Taylorville | City | Christian | 12,666 | 12,431 | 12,238 |
| Tennessee | Village | McDonough | 144 | 136 | 130 |
| Teutopolis | Village | Effingham | 1,560 | 1,623 | 1,660 |
| Thawville | Village | Iroquois | 258 | 276 | 296 |
| Thayer | Village | Sangamon | 750 | 712 | 688 |
| Thebes | Village | Alexander | 478 | 447 | 406 |
| Third Lake | Village | Lake | 1,356 | 1,389 | 1,382 |
| Thomasboro | Village | Champaign | 1,233 | 1,231 | 1,209 |
| Thompsonville | Village | Franklin | 571 | 582 | 588 |
| Thomson | Village | Carroll | 559 | 542 | 524 |
| Thornton | Village | Cook | 2,582 | 2,473 | 2,386 |
| Tilden | Village | Randolph | 922 | 904 | 870 |
| Tilton | Village | Vermilion | 2,976 | 2,858 | 2,779 |
| Timberlane | Village | Boone | 251 | 366 | 615 |
| Time | Village | Pike | 29 | 28 | 27 |
| Tinley Park | Village | 48,841 | 56,244 | 59,198 | |
| Tiskilwa | Village | Bureau | 787 | 754 | 750 |
| Toledo | Village | Cumberland | 1,171 | 1,136 | 1,129 |
| Tolono | Village | Champaign | 2,714 | 2,757 | 2,836 |
| Toluca | City | Marshall | 1,339 | 1,289 | 1,250 |
| Tonica | Village | La Salle | 685 | 693 | 698 |
| Topeka | Village | Mason | 90 | 88 | 84 |
| Toulon | City | Stark | 1,381 | 1,344 | 1,339 |
| Tovey | Village | Christian | 516 | 496 | 486 |
| Towanda | Village | McLean | 493 | 484 | 487 |
| Tower Hill | Village | Shelby | 609 | 598 | 576 |
| Tower Lakes | Village | Lake | 1,310 | 1,315 | 1,302 |
| Tremont | Village | Tazewell | 2,029 | 2,008 | 2,070 |
| Trenton | City | Clinton | 2,621 | 2,642 | 2,661 |
| Trout Valley | Village | McHenry | 599 | 601 | 602 |
| Troy | City | Madison | 8,538 | 9,210 | 9,840 |
| Troy Grove | Village | La Salle | 305 | 304 | 301 |
| Tuscola | City | Douglas | 4,481 | 4,553 | 4,514 |
| Ullin | Village | Pulaski | 779 | 729 | 696 |
| Union | Village | McHenry | 577 | 575 | 615 |
| Union Hill | Village | Kankakee | 66 | 64 | 63 |
| University Park | Village | 6,699 | 7,825 | 8,171 | |
| Urbana | City | Champaign | 37,853 | 38,631 | 39,641 |
| Ursa | Village | Adams | 595 | 587 | 585 |
| Valier | Village | Franklin | 662 | 649 | 664 |
| Valley City | Village | Pike | 14 | 14 | 13 |
| Valmeyer | Village | Monroe | 607 | 873 | 1,164 |
| Vandalia | City | Fayette | 6,993 | 5,904 | 6,321 |
| Varna | Village | Marshall | 436 | 426 | 410 |
| Venedy | Village | Washington | 137 | 135 | 131 |
| Venice | City | Madison | 2,528 | 2,469 | 2,421 |
| Vergennes | Village | Jackson | 330 | 333 | 321 |
| Vermilion | Village | Edgar | 239 | 226 | 219 |
| Vermont | Village | Fulton | 792 | 774 | 751 |
| Vernon | Village | Marion | 178 | 173 | 170 |
| Vernon Hills | Village | Lake | 20,168 | 23,204 | 24,462 |
| Verona | Village | Grundy | 257 | 249 | 258 |
| Versailles | Village | Brown | 567 | 552 | 527 |
| Victoria | Village | Knox | 325 | 302 | 293 |
| Vienna | City | Johnson | 1,234 | 1,262 | 1,282 |
| Villa Grove | City | Douglas | 2,553 | 2,483 | 2,449 |
| Villa Park | Village | DuPage | 22,107 | 22,698 | 22,198 |
| Viola | Village | Mercer | 956 | 945 | 928 |
| Virden | City | 3,488 | 3,443 | 3,364 | |
| Virgil | Village | Kane | 266 | 299 | 308 |
| Virginia | City | Cass | 1,728 | 1,718 | 1,664 |
| Volo | Village | Lake | 209 | 228 | 803 |
| Wadsworth | Village | Lake | 3,311 | 3,705 | 3,829 |
| Waggoner | Village | Montgomery | 245 | 244 | 238 |
| Walnut | Village | Bureau | 1,463 | 1,409 | 1,400 |
| Walnut Hill | Village | Marion | 109 | 106 | 104 |
| Walshville | Village | Montgomery | 89 | 89 | 86 |
| Waltonville | Village | Jefferson | 428 | 430 | 428 |
| Wamac | City | 1,378 | 1,308 | 1,270 | |
| Wapella | Village | De Witt | 651 | 635 | 638 |
| Warren | Village | Jo Daviess | 1,496 | 1,429 | 1,370 |
| Warrensburg | Village | Macon | 1,289 | 1,211 | 1,172 |
| Warrenville | City | DuPage | 13,362 | 13,209 | 13,033 |
| Warsaw | City | Hancock | 1,793 | 1,665 | 1,603 |
| Washburn | Village | 1,147 | 1,103 | 1,100 | |
| Washington | City | Tazewell | 11,689 | 12,352 | 13,942 |
| Washington Park | Village | St. Clair | 5,942 | 5,761 | 5,558 |
| Wataga | Village | Knox | 857 | 809 | 787 |
| Waterloo | City | Monroe | 8,118 | 9,093 | 9,813 |
| Waterman | Village | DeKalb | 1,245 | 1,242 | 1,527 |
| Watseka | City | Iroquois | 5,675 | 5,496 | 5,481 |
| Watson | Village | Effingham | 747 | 757 | 743 |
| Wauconda | Village | Lake | 9,596 | 10,078 | 12,219 |
| Waukegan | City | Lake | 88,041 | 90,761 | 90,788 |
| Waverly | City | Morgan | 1,346 | 1,279 | 1,235 |
| Wayne | Village | 2,148 | 2,308 | 2,394 | |
| Wayne City | Village | Wayne | 1,096 | 1,071 | 1,059 |
| Waynesville | Village | De Witt | 452 | 437 | 429 |
| Weldon | Village | De Witt | 439 | 425 | 417 |
| Wellington | Village | Iroquois | 264 | 256 | 263 |
| Wenona | City | Marshall | 1,057 | 1,062 | 1,043 |
| Wenonah | Village | Montgomery | 44 | 43 | 43 |
| West Brooklyn | Village | Lee | 174 | 170 | 167 |
| West Chicago | City | DuPage | 23,658 | 26,042 | 26,454 |
| West City | Village | Franklin | 716 | 724 | 762 |
| West Dundee | Village | Kane | 5,442 | 7,359 | 7,975 |
| West Frankfort | City | Franklin | 8,242 | 8,163 | 8,190 |
| West Peoria | City | Peoria | 4,771 | 4,546 | 4,456 |
| West Point | Village | Hancock | 195 | 186 | 180 |
| West Salem | Village | Edwards | 1,001 | 966 | 937 |
| Westchester | Village | Cook | 16,824 | 16,305 | 15,710 |
| Western Springs | Village | Cook | 12,548 | 12,567 | 12,690 |
| Westfield | Village | Clark | 678 | 663 | 658 |
| Westmont | Village | DuPage | 24,902 | 24,838 | 24,979 |
| Westville | Village | Vermilion | 3,175 | 3,061 | 3,001 |
| Wheaton | City | DuPage | 55,530 | 54,869 | 54,465 |
| Wheeler | Village | Jasper | 119 | 117 | 114 |
| Wheeling | Village | 36,196 | 36,626 | 36,063 | |
| White City | Village | Macoupin | 221 | 218 | 222 |
| White Hall | City | Greene | 2,629 | 2,562 | 2,455 |
| Whiteash | Village | Williamson | 268 | 275 | 273 |
| Williamsfield | Village | Knox | 620 | 591 | 573 |
| Williamson | Village | Madison | 251 | 248 | 244 |
| Williamsville | Village | Sangamon | 1,439 | 1,409 | 1,388 |
| Willisville | Village | Perry | 706 | 691 | 686 |
| Willow Hill | Village | Jasper | 250 | 240 | 232 |
| Willow Springs | Village | Cook | 5,070 | 6,017 | 5,898 |
| Willowbrook | Village | DuPage | 8,994 | 8,885 | 8,739 |
| Wilmette | Village | Cook | 27,637 | 27,001 | 26,418 |
| Wilmington | Village | Greene | 120 | 117 | 112 |
| Wilmington | City | Will | 5,187 | 5,738 | 6,122 |
| Wilsonville | Village | Macoupin | 604 | 594 | 580 |
| Winchester | City | Scott | 1,658 | 1,605 | 1,548 |
| Windsor | Village | Mercer | 720 | 698 | 681 |
| Windsor | City | Shelby | 1,125 | 1,070 | 1,030 |
| Winfield | Village | DuPage | 8,808 | 9,649 | 9,984 |
| Winnebago | Village | Winnebago | 2,958 | 2,997 | 3,216 |
| Winnetka | Village | Cook | 12,419 | 12,425 | 12,371 |
| Winslow | Village | Stephenson | 345 | 337 | 326 |
| Winthrop Harbor | Village | Lake | 6,729 | 6,910 | 7,210 |
| Witt | City | Montgomery | 991 | 979 | 959 |
| Wonder Lake | Village | McHenry | 2,958 | 3,368 | 3,878 |
| Wood Dale | City | DuPage | 13,596 | 13,389 | 13,855 |
| Wood River | City | Madison | 11,341 | 11,122 | 10,973 |
| Woodhull | Village | Henry | 809 | 802 | 790 |
| Woodland | Village | Iroquois | 319 | 310 | 305 |
| Woodlawn | Village | Jefferson | 716 | 723 | 722 |
| Woodridge | Village | 31,040 | 33,779 | 34,130 | |
| Woodson | Village | Morgan | 559 | 555 | 540 |
| Woodstock | City | McHenry | 20,264 | 21,447 | 23,930 |
| Worden | Village | Madison | 916 | 1,002 | 1,037 |
| Worth | Village | Cook | 11,047 | 10,678 | 10,426 |
| Wyanet | Village | Bureau | 1,028 | 997 | 987 |
| Wyoming | City | Stark | 1,440 | 1,399 | 1,394 |
| Xenia | Village | Clay | 410 | 400 | 394 |
| Yale | Village | Jasper | 97 | 95 | 92 |
| Yates City | Village | Knox | 725 | 690 | 667 |
| Yorkville | City | Kendall | 6,499 | 9,557 | 16,505 |
| Zeigler | City | Franklin | 1,669 | 1,654 | 1,665 |
| Zion | City | Lake | 22,916 | 23,855 | 25,161 |
Change: (E 2008-07-01) in comparison to (C 2000-04-01).
Source: US Census Bureau (web).
2009-07-04HTTP://WWW.CITYPOPULATION.DE© TH. BRINKHOFF