# List of municipalities in Illinois

Illinois is a state located in the Midwestern United States. According to the 2020 United States census, Illinois is the 6th most populous state with 12,812,508 inhabitants but the 24th largest by land area spanning 55,499.0 square miles (143,742 km$^2$) of land. Illinois is divided into 102 counties and, as of 2020, contained 1,300 municipalities consisting of cities, towns, and villages.
The most populous city is Chicago with 2,746,388 residents while the least populous is Valley City with 14 residents. The largest municipality by land area is Chicago, which spans 227.73 sq mi (589.8 km$^2$), while the smallest is Irwin at 0.045 sq mi (0.12 km$^2$).

## List

* Most populous municipalities
* Chicago is Illinois' most populous municipality.
* Paramount Theatre in Aurora, Illinois' second most populous municipality
* Union Station in Joliet, Illinois' third most populous municipality
* Downtown block in Naperville, Illinois' fourth most populous municipality
* Skyline of Rockford as seen from the Rock River, Illinois' fifth most populous municipality
* Aerial view of downtown Elgin, Illinois' sixth most populous municipality
* Illinois State Capitol in Springfield, Illinois' capital city and seventh most populous municipality
* Skyline of Peoria, Illinois' eighth most populous municipality
Key :
| † | County seat | ‡ | State capital |
| Name | Type | County(ies) | Population (2020) | Population (2010) | Change | Land area (2020) | Land area (2020) | Population density |
| Name | Type | County(ies) | Population (2020) | Population (2010) | Change | sq mi | km2 | Population density |
| Abingdon | City | Knox | 2,951 | 3,319 | −11.1% | 1.425 | 3.69 | 2,070.9/sq mi (799.6/km$^2$) |
| Addieville | Village | Washington | 259 | 252 | +2.8% | 0.993 | 2.57 | 260.8/sq mi (100.7/km$^2$) |
| Addison | Village | DuPage | 35,702 | 36,942 | −3.4% | 9.829 | 25.46 | 3,632.3/sq mi (1,402.4/km$^2$) |
| Adeline | Village | Ogle | 78 | 85 | −8.2% | 0.266 | 0.69 | 293.2/sq mi (113.2/km$^2$) |
| Albany | Village | Whiteside | 864 | 891 | −3.0% | 1.071 | 2.77 | 806.7/sq mi (311.5/km$^2$) |
| Albers | Village | Clinton | 1,121 | 1,190 | −5.8% | 0.846 | 2.19 | 1,325.1/sq mi (511.6/km$^2$) |
| Albion† | City | Edwards | 1,971 | 1,988 | −0.9% | 2.136 | 5.53 | 922.8/sq mi (356.3/km$^2$) |
| Aledo† | City | Mercer | 3,633 | 3,640 | −0.2% | 2.368 | 6.13 | 1,534.2/sq mi (592.4/km$^2$) |
| Alexis | Village | Warren Mercer | 793 | 831 | −4.6% | 0.475 | 1.23 | 1,669.5/sq mi (644.6/km$^2$) |
| Algonquin | Village | McHenry Kane | 29,700 | 30,046 | −1.2% | 12.302 | 31.86 | 2,414.2/sq mi (932.1/km$^2$) |
| Alhambra | Village | Madison | 622 | 681 | −8.7% | 0.756 | 1.96 | 822.8/sq mi (317.7/km$^2$) |
| Allendale | Village | Wabash | 458 | 475 | −3.6% | 0.307 | 0.80 | 1,491.9/sq mi (576.0/km$^2$) |
| Allenville | Village | Moultrie | 132 | 148 | −10.8% | 0.609 | 1.58 | 216.7/sq mi (83.7/km$^2$) |
| Allerton | Village | Champaign | 262 | 291 | −10.0% | 0.679 | 1.76 | 385.9/sq mi (149.0/km$^2$) |
| Alma | Village | Marion | 318 | 320 | −0.6% | 1.132 | 2.93 | 280.9/sq mi (108.5/km$^2$) |
| Alpha | Village | Henry | 675 | 671 | +0.6% | 0.309 | 0.80 | 2,184.5/sq mi (843.4/km$^2$) |
| Alsey | Village | Scott | 195 | 227 | −14.1% | 0.549 | 1.42 | 355.2/sq mi (137.1/km$^2$) |
| Alsip | Village | Cook | 19,063 | 19,277 | −1.1% | 6.525 | 16.90 | 2,921.5/sq mi (1,128.0/km$^2$) |
| Altamont | City | Effingham | 2,216 | 2,319 | −4.4% | 1.489 | 3.86 | 1,488.2/sq mi (574.6/km$^2$) |
| Alton | City | Madison | 25,676 | 27,865 | −7.9% | 15.681 | 40.61 | 1,637.4/sq mi (632.2/km$^2$) |
| Altona | Village | Knox | 463 | 531 | −12.8% | 0.938 | 2.43 | 493.6/sq mi (190.6/km$^2$) |
| Alto Pass | Village | Union | 319 | 391 | −18.4% | 2.134 | 5.53 | 149.5/sq mi (57.7/km$^2$) |
| Alvin | Village | Vermilion | 233 | 270 | −13.7% | 0.793 | 2.05 | 293.8/sq mi (113.4/km$^2$) |
| Amboy | City | Lee | 2,278 | 2,500 | −8.9% | 6.368 | 16.49 | 357.7/sq mi (138.1/km$^2$) |
| Anchor | Village | McLean | 163 | 146 | +11.6% | 0.171 | 0.44 | 953.2/sq mi (368.0/km$^2$) |
| Andalusia | Village | Rock Island | 1,184 | 1,178 | +0.5% | 1.175 | 3.04 | 1,007.7/sq mi (389.1/km$^2$) |
| Andover | Village | Henry | 555 | 578 | −4.0% | 0.991 | 2.57 | 560.0/sq mi (216.2/km$^2$) |
| Anna | City | Union | 4,303 | 4,442 | −3.1% | 3.558 | 9.22 | 1,209.4/sq mi (466.9/km$^2$) |
| Annawan | Town | Henry | 884 | 878 | +0.7% | 2.135 | 5.53 | 414.1/sq mi (159.9/km$^2$) |
| Antioch | Village | Lake | 14,622 | 14,430 | +1.3% | 8.213 | 21.27 | 1,780.3/sq mi (687.4/km$^2$) |
| Apple River | Village | Jo Daviess | 347 | 366 | −5.2% | 0.705 | 1.83 | 492.2/sq mi (190.0/km$^2$) |
| Arcola | City | Douglas | 2,927 | 2,916 | +0.4% | 2.023 | 5.24 | 1,446.9/sq mi (558.6/km$^2$) |
| Arenzville | Village | Cass | 367 | 409 | −10.3% | 0.768 | 1.99 | 477.9/sq mi (184.5/km$^2$) |
| Argenta | Village | Macon | 913 | 947 | −3.6% | 0.653 | 1.69 | 1,398.2/sq mi (539.8/km$^2$) |
| Arlington | Village | Bureau | 169 | 193 | −12.4% | 0.395 | 1.02 | 427.8/sq mi (165.2/km$^2$) |
| Arlington Heights | Village | Cook | 77,676 | 75,101 | +3.4% | 16.605 | 43.01 | 4,677.9/sq mi (1,806.1/km$^2$) |
| Armington | Village | Tazewell | 310 | 343 | −9.6% | 0.285 | 0.74 | 1,087.7/sq mi (420.0/km$^2$) |
| Aroma Park | Village | Kankakee | 664 | 743 | −10.6% | 1.882 | 4.87 | 352.8/sq mi (136.2/km$^2$) |
| Arrowsmith | Village | McLean | 276 | 294 | −6.1% | 0.197 | 0.51 | 1,401.0/sq mi (540.9/km$^2$) |
| Arthur | Village | Douglas Moultrie | 2,231 | 2,288 | −2.5% | 1.337 | 3.46 | 1,668.7/sq mi (644.3/km$^2$) |
| Ashkum | Village | Iroquois | 750 | 761 | −1.4% | 0.835 | 2.16 | 898.2/sq mi (346.8/km$^2$) |
| Ashland | Village | Cass | 1,218 | 1,333 | −8.6% | 0.748 | 1.94 | 1,628.3/sq mi (628.7/km$^2$) |
| Ashley | City | Washington | 462 | 536 | −13.8% | 1.128 | 2.92 | 409.6/sq mi (158.1/km$^2$) |
| Ashmore | Village | Coles | 637 | 785 | −18.9% | 0.805 | 2.08 | 791.3/sq mi (305.5/km$^2$) |
| Ashton | Village | Lee | 967 | 972 | −0.5% | 0.670 | 1.74 | 1,443.3/sq mi (557.3/km$^2$) |
| Assumption | City | Christian | 1,155 | 1,168 | −1.1% | 0.990 | 2.56 | 1,166.7/sq mi (450.5/km$^2$) |
| Astoria | Town | Fulton | 929 | 1,141 | −18.6% | 0.586 | 1.52 | 1,585.3/sq mi (612.1/km$^2$) |
| Athens | City | Menard | 1,977 | 1,988 | −0.6% | 1.682 | 4.36 | 1,175.4/sq mi (453.8/km$^2$) |
| Atkinson | Town | Henry | 965 | 972 | −0.7% | 1.921 | 4.98 | 502.3/sq mi (194.0/km$^2$) |
| Atlanta | City | Logan | 1,669 | 1,692 | −1.4% | 1.249 | 3.23 | 1,336.3/sq mi (515.9/km$^2$) |
| Atwood | Village | Douglas Piatt | 1,116 | 1,224 | −8.8% | 0.614 | 1.59 | 1,817.6/sq mi (701.8/km$^2$) |
| Auburn | City | Sangamon | 4,574 | 4,771 | −4.1% | 4.124 | 10.68 | 1,109.1/sq mi (428.2/km$^2$) |
| Augusta | Village | Hancock | 553 | 587 | −5.8% | 0.691 | 1.79 | 800.3/sq mi (309.0/km$^2$) |
| Aurora | City | Kane DuPage Will Kendall | 180,542 | 197,899 | −8.8% | 45.023 | 116.61 | 4,010.0/sq mi (1,548.3/km$^2$) |
| Ava | City | Jackson | 553 | 654 | −15.4% | 1.057 | 2.74 | 523.2/sq mi (202.0/km$^2$) |
| Aviston | Village | Clinton | 2,340 | 1,945 | +20.3% | 1.600 | 4.14 | 1,462.5/sq mi (564.7/km$^2$) |
| Avon | Village | Fulton | 704 | 799 | −11.9% | 0.444 | 1.15 | 1,585.6/sq mi (612.2/km$^2$) |
| Baldwin | Village | Randolph | 314 | 373 | −15.8% | 0.666 | 1.72 | 471.5/sq mi (182.0/km$^2$) |
| Banner | Village | Fulton | 169 | 189 | −10.6% | 1.290 | 3.34 | 131.0/sq mi (50.6/km$^2$) |
| Bannockburn | Village | Lake | 1,013 | 1,583 | −36.0% | 2.028 | 5.25 | 499.5/sq mi (192.9/km$^2$) |
| Bardolph | Village | McDonough | 210 | 251 | −16.3% | 0.617 | 1.60 | 340.4/sq mi (131.4/km$^2$) |
| Barrington | Village | Cook Lake | 10,722 | 10,327 | +3.8% | 4.608 | 11.93 | 2,326.8/sq mi (898.4/km$^2$) |
| Barrington Hills | Village | Cook McHenry Lake Kane | 4,114 | 4,209 | −2.3% | 27.004 | 69.94 | 152.3/sq mi (58.8/km$^2$) |
| Barry | City | Pike | 1,303 | 1,318 | −1.1% | 1.432 | 3.71 | 909.9/sq mi (351.3/km$^2$) |
| Bartelso | Village | Clinton | 635 | 595 | +6.7% | 0.431 | 1.12 | 1,473.3/sq mi (568.9/km$^2$) |
| Bartlett | Village | Cook DuPage Kane | 41,105 | 41,208 | −0.2% | 15.726 | 40.73 | 2,613.8/sq mi (1,009.2/km$^2$) |
| Bartonville | Village | Peoria | 5,945 | 6,471 | −8.1% | 8.050 | 20.85 | 738.5/sq mi (285.1/km$^2$) |
| Basco | Village | Hancock | 80 | 98 | −18.4% | 0.222 | 0.57 | 360.4/sq mi (139.1/km$^2$) |
| Batavia | City | Kane | 26,098 | 26,045 | +0.2% | 10.616 | 27.50 | 2,458.4/sq mi (949.2/km$^2$) |
| Batchtown | Village | Calhoun | 170 | 214 | −20.6% | 1.863 | 4.83 | 91.3/sq mi (35.2/km$^2$) |
| Bath | Village | Mason | 279 | 333 | −16.2% | 0.365 | 0.95 | 764.4/sq mi (295.1/km$^2$) |
| Baylis | Village | Pike | 172 | 205 | −16.1% | 0.471 | 1.22 | 365.2/sq mi (141.0/km$^2$) |
| Bay View Gardens | Village | Woodford | 354 | 378 | −6.3% | 0.569 | 1.47 | 622.1/sq mi (240.2/km$^2$) |
| Beach Park | Village | Lake | 14,249 | 13,638 | +4.5% | 7.079 | 18.33 | 2,012.9/sq mi (777.2/km$^2$) |
| Beardstown | City | Cass | 5,951 | 6,123 | −2.8% | 3.619 | 9.37 | 1,644.4/sq mi (634.9/km$^2$) |
| Beaverville | Village | Iroquois | 306 | 362 | −15.5% | 0.275 | 0.71 | 1,112.7/sq mi (429.6/km$^2$) |
| Beckemeyer | Village | Clinton | 923 | 1,040 | −11.3% | 0.613 | 1.59 | 1,505.7/sq mi (581.4/km$^2$) |
| Bedford Park | Village | Cook | 602 | 580 | +3.8% | 5.934 | 15.37 | 101.4/sq mi (39.2/km$^2$) |
| Beecher | Village | Will | 4,713 | 4,359 | +8.1% | 2.728 | 7.07 | 1,727.6/sq mi (667.0/km$^2$) |
| Beecher City | Village | Effingham | 428 | 463 | −7.6% | 0.895 | 2.32 | 478.2/sq mi (184.6/km$^2$) |
| Belgium | Village | Vermilion | 358 | 404 | −11.4% | 0.434 | 1.12 | 824.9/sq mi (318.5/km$^2$) |
| Belknap | Village | Johnson | 88 | 104 | −15.4% | 1.057 | 2.74 | 83.3/sq mi (32.1/km$^2$) |
| Belle Prairie City | Town | Hamilton | 49 | 54 | −9.3% | 0.438 | 1.13 | 111.9/sq mi (43.2/km$^2$) |
| Belle Rive | Village | Jefferson | 309 | 361 | −14.4% | 1.026 | 2.66 | 301.2/sq mi (116.3/km$^2$) |
| Belleville† | City | St. Clair | 42,404 | 44,478 | −4.7% | 23.222 | 60.14 | 1,826.0/sq mi (705.0/km$^2$) |
| Bellevue | Village | Peoria | 1,878 | 1,978 | −5.1% | 2.224 | 5.76 | 844.4/sq mi (326.0/km$^2$) |
| Bellflower | Village | McLean | 346 | 357 | −3.1% | 0.361 | 0.93 | 958.4/sq mi (370.1/km$^2$) |
| Bellmont | Village | Wabash | 247 | 276 | −10.5% | 0.325 | 0.84 | 760.0/sq mi (293.4/km$^2$) |
| Bellwood | Village | Cook | 18,789 | 19,071 | −1.5% | 2.398 | 6.21 | 7,835.3/sq mi (3,025.2/km$^2$) |
| Belvidere† | City | Boone | 25,339 | 25,585 | −1.0% | 12.064 | 31.25 | 2,100.4/sq mi (811.0/km$^2$) |
| Bement | Village | Piatt | 1,484 | 1,730 | −14.2% | 0.778 | 2.02 | 1,907.5/sq mi (736.5/km$^2$) |
| Benld | City | Macoupin | 1,464 | 1,556 | −5.9% | 1.060 | 2.75 | 1,381.1/sq mi (533.3/km$^2$) |
| Bensenville | Village | DuPage | 18,813 | 18,352 | +2.5% | 5.530 | 14.32 | 3,402.0/sq mi (1,313.5/km$^2$) |
| Benson | Village | Woodford | 412 | 423 | −2.6% | 0.163 | 0.42 | 2,527.6/sq mi (975.9/km$^2$) |
| Bentley | Town | Hancock | 30 | 35 | −14.3% | 0.143 | 0.37 | 209.8/sq mi (81.0/km$^2$) |
| Benton† | City | Franklin | 6,709 | 7,087 | −5.3% | 5.480 | 14.19 | 1,224.3/sq mi (472.7/km$^2$) |
| Berkeley | Village | Cook | 5,338 | 5,209 | +2.5% | 1.402 | 3.63 | 3,807.4/sq mi (1,470.1/km$^2$) |
| Berlin | Village | Sangamon | 141 | 180 | −21.7% | 0.891 | 2.31 | 158.2/sq mi (61.1/km$^2$) |
| Berwyn | City | Cook | 57,250 | 56,657 | +1.0% | 3.904 | 10.11 | 14,664.4/sq mi (5,662.0/km$^2$) |
| Bethalto | Village | Madison | 9,310 | 9,521 | −2.2% | 7.591 | 19.66 | 1,226.5/sq mi (473.5/km$^2$) |
| Bethany | Village | Moultrie | 1,255 | 1,352 | −7.2% | 0.977 | 2.53 | 1,284.5/sq mi (496.0/km$^2$) |
| Biggsville | Village | Henderson | 300 | 304 | −1.3% | 0.337 | 0.87 | 890.2/sq mi (343.7/km$^2$) |
| Big Rock | Village | Kane | 1,104 | 1,126 | −2.0% | 4.318 | 11.18 | 255.7/sq mi (98.7/km$^2$) |
| Bingham | Village | Fayette | 60 | 83 | −27.7% | 0.274 | 0.71 | 219.0/sq mi (84.5/km$^2$) |
| Bishop Hill | Village | Henry | 113 | 128 | −11.7% | 0.532 | 1.38 | 212.4/sq mi (82.0/km$^2$) |
| Bismarck | Village | Vermilion | 582 | 579 | +0.5% | 0.743 | 1.92 | 783.3/sq mi (302.4/km$^2$) |
| Blandinsville | Village | McDonough | 569 | 651 | −12.6% | 0.875 | 2.27 | 650.3/sq mi (251.1/km$^2$) |
| Bloomingdale | Village | DuPage | 22,382 | 22,018 | +1.7% | 6.766 | 17.52 | 3,308.0/sq mi (1,277.2/km$^2$) |
| Bloomington† | City | McLean | 78,680 | 76,610 | +2.7% | 27.129 | 70.26 | 2,900.2/sq mi (1,119.8/km$^2$) |
| Blue Island | City | Cook | 22,558 | 23,706 | −4.8% | 4.071 | 10.54 | 5,541.1/sq mi (2,139.4/km$^2$) |
| Blue Mound | Village | Macon | 1,133 | 1,158 | −2.2% | 0.585 | 1.52 | 1,936.8/sq mi (747.8/km$^2$) |
| Bluffs | Village | Scott | 618 | 715 | −13.6% | 0.893 | 2.31 | 692.0/sq mi (267.2/km$^2$) |
| Bluford | Village | Jefferson | 630 | 688 | −8.4% | 1.561 | 4.04 | 403.6/sq mi (155.8/km$^2$) |
| Bolingbrook | Village | Will DuPage | 73,922 | 73,366 | +0.8% | 24.845 | 64.35 | 2,975.3/sq mi (1,148.8/km$^2$) |
| Bondville | Village | Champaign | 388 | 443 | −12.4% | 0.251 | 0.65 | 1,545.8/sq mi (596.8/km$^2$) |
| Bone Gap | Village | Edwards | 181 | 246 | −26.4% | 0.583 | 1.51 | 310.5/sq mi (119.9/km$^2$) |
| Bonfield | Village | Kankakee | 351 | 382 | −8.1% | 0.492 | 1.27 | 713.4/sq mi (275.5/km$^2$) |
| Bonnie | Village | Jefferson | 374 | 397 | −5.8% | 1.275 | 3.30 | 293.3/sq mi (113.3/km$^2$) |
| Bourbonnais | Village | Kankakee | 18,164 | 18,631 | −2.5% | 9.312 | 24.12 | 1,950.6/sq mi (753.1/km$^2$) |
| Bowen | Village | Hancock | 464 | 494 | −6.1% | 0.428 | 1.11 | 1,084.1/sq mi (418.6/km$^2$) |
| Braceville | Village | Grundy | 724 | 793 | −8.7% | 3.111 | 8.06 | 232.7/sq mi (89.9/km$^2$) |
| Bradford | Village | Stark | 676 | 768 | −12.0% | 0.398 | 1.03 | 1,698.5/sq mi (655.8/km$^2$) |
| Bradley | Village | Kankakee | 15,419 | 15,895 | −3.0% | 6.932 | 17.95 | 2,224.3/sq mi (858.8/km$^2$) |
| Braidwood | City | Will | 6,194 | 6,191 | 0.0% | 5.296 | 13.72 | 1,169.6/sq mi (451.6/km$^2$) |
| Breese | City | Clinton | 4,641 | 4,442 | +4.5% | 2.669 | 6.91 | 1,738.9/sq mi (671.4/km$^2$) |
| Bridgeport | City | Lawrence | 1,800 | 1,886 | −4.6% | 1.072 | 2.78 | 1,679.1/sq mi (648.3/km$^2$) |
| Bridgeview | Village | Cook | 17,027 | 16,446 | +3.5% | 4.133 | 10.70 | 4,119.8/sq mi (1,590.7/km$^2$) |
| Brighton | Village | Macoupin Jersey | 2,221 | 2,254 | −1.5% | 1.921 | 4.98 | 1,156.2/sq mi (446.4/km$^2$) |
| Brimfield | Village | Peoria | 778 | 868 | −10.4% | 0.821 | 2.13 | 947.6/sq mi (365.9/km$^2$) |
| Broadlands | Village | Champaign | 316 | 349 | −9.5% | 0.322 | 0.83 | 981.4/sq mi (378.9/km$^2$) |
| Broadview | Village | Cook | 7,998 | 7,932 | +0.8% | 1.777 | 4.60 | 4,500.8/sq mi (1,737.8/km$^2$) |
| Broadwell | Village | Logan | 136 | 145 | −6.2% | 0.180 | 0.47 | 755.6/sq mi (291.7/km$^2$) |
| Brocton | Village | Edgar | 273 | 322 | −15.2% | 0.572 | 1.48 | 477.3/sq mi (184.3/km$^2$) |
| Brookfield | Village | Cook | 19,476 | 18,978 | +2.6% | 3.064 | 7.94 | 6,356.4/sq mi (2,454.2/km$^2$) |
| Brooklyn | Village | St. Clair | 649 | 749 | −13.4% | 0.811 | 2.10 | 800.2/sq mi (309.0/km$^2$) |
| Brookport | City | Massac | 725 | 984 | −26.3% | 0.653 | 1.69 | 1,110.3/sq mi (428.7/km$^2$) |
| Broughton | Village | Hamilton | 185 | 194 | −4.6% | 1.890 | 4.90 | 97.9/sq mi (37.8/km$^2$) |
| Browning | Village | Schuyler | 117 | 137 | −14.6% | 0.310 | 0.80 | 377.4/sq mi (145.7/km$^2$) |
| Browns | Village | Edwards | 139 | 134 | +3.7% | 0.290 | 0.75 | 479.3/sq mi (185.1/km$^2$) |
| Brownstown | Village | Fayette | 690 | 759 | −9.1% | 0.760 | 1.97 | 907.9/sq mi (350.5/km$^2$) |
| Brussels | Village | Calhoun | 116 | 141 | −17.7% | 0.558 | 1.45 | 207.9/sq mi (80.3/km$^2$) |
| Bryant | Village | Fulton | 168 | 220 | −23.6% | 0.248 | 0.64 | 677.4/sq mi (261.6/km$^2$) |
| Buckingham | Village | Kankakee | 244 | 300 | −18.7% | 0.251 | 0.65 | 972.1/sq mi (375.3/km$^2$) |
| Buckley | Village | Iroquois | 495 | 600 | −17.5% | 0.316 | 0.82 | 1,566.5/sq mi (604.8/km$^2$) |
| Buckner | Village | Franklin | 409 | 462 | −11.5% | 0.872 | 2.26 | 469.0/sq mi (181.1/km$^2$) |
| Buda | Village | Bureau | 482 | 538 | −10.4% | 1.014 | 2.63 | 475.3/sq mi (183.5/km$^2$) |
| Buffalo | Village | Sangamon | 447 | 503 | −11.1% | 0.345 | 0.89 | 1,295.7/sq mi (500.3/km$^2$) |
| Buffalo Grove | Village | Cook Lake | 43,212 | 41,496 | +4.1% | 9.563 | 24.77 | 4,518.7/sq mi (1,744.7/km$^2$) |
| Bull Valley | Village | McHenry | 1,128 | 1,077 | +4.7% | 9.128 | 23.64 | 123.6/sq mi (47.7/km$^2$) |
| Bulpitt | Village | Christian | 212 | 222 | −4.5% | 0.069 | 0.18 | 3,072.5/sq mi (1,186.3/km$^2$) |
| Buncombe | Village | Johnson | 207 | 203 | +2.0% | 1.187 | 3.07 | 174.4/sq mi (67.3/km$^2$) |
| Bunker Hill | City | Macoupin | 1,630 | 1,774 | −8.1% | 1.274 | 3.30 | 1,279.4/sq mi (494.0/km$^2$) |
| Burbank | City | Cook | 29,439 | 28,925 | +1.8% | 4.170 | 10.80 | 7,059.7/sq mi (2,725.8/km$^2$) |
| Bureau Junction | Village | Bureau | 281 | 322 | −12.7% | 1.446 | 3.75 | 194.3/sq mi (75.0/km$^2$) |
| Burlington | Village | Kane | 535 | 618 | −13.4% | 6.855 | 17.75 | 78.0/sq mi (30.1/km$^2$) |
| Burnham | Village | Cook | 4,046 | 4,206 | −3.8% | 1.855 | 4.80 | 2,181.1/sq mi (842.1/km$^2$) |
| Burnt Prairie | Village | White | 36 | 52 | −30.8% | 0.076 | 0.20 | 473.7/sq mi (182.9/km$^2$) |
| Burr Ridge | Village | DuPage Cook | 11,192 | 10,559 | +6.0% | 7.143 | 18.50 | 1,566.8/sq mi (605.0/km$^2$) |
| Bush | Village | Williamson | 241 | 275 | −12.4% | 0.455 | 1.18 | 529.7/sq mi (204.5/km$^2$) |
| Bushnell | City | McDonough | 2,718 | 3,117 | −12.8% | 2.117 | 5.48 | 1,283.9/sq mi (495.7/km$^2$) |
| Butler | Village | Montgomery | 164 | 180 | −8.9% | 0.596 | 1.54 | 275.2/sq mi (106.2/km$^2$) |
| Byron | City | Ogle | 3,784 | 3,753 | +0.8% | 4.650 | 12.04 | 813.8/sq mi (314.2/km$^2$) |
| Cabery | Village | Ford Kankakee | 231 | 266 | −13.2% | 0.344 | 0.89 | 671.5/sq mi (259.3/km$^2$) |
| Cahokia Heights | City | St. Clair | 17,894 | 22,552 | −20.7% | 16.37 | 42.4 | 1,093.1/sq mi (422.0/km$^2$) |
| Cairo† | City | Alexander | 1,733 | 2,831 | −38.8% | 6.987 | 18.10 | 248.0/sq mi (95.8/km$^2$) |
| Caledonia | Village | Boone | 183 | 197 | −7.1% | 1.035 | 2.68 | 176.8/sq mi (68.3/km$^2$) |
| Calhoun | Village | Richland | 164 | 172 | −4.7% | 0.912 | 2.36 | 179.8/sq mi (69.4/km$^2$) |
| Calumet City | City | Cook | 36,033 | 37,042 | −2.7% | 7.181 | 18.60 | 5,017.8/sq mi (1,937.4/km$^2$) |
| Calumet Park | Village | Cook | 7,025 | 7,835 | −10.3% | 1.117 | 2.89 | 6,289.2/sq mi (2,428.3/km$^2$) |
| Camargo | Village | Douglas | 452 | 445 | +1.6% | 1.259 | 3.26 | 359.0/sq mi (138.6/km$^2$) |
| Cambria | Village | Williamson | 1,505 | 1,228 | +22.6% | 1.415 | 3.66 | 1,063.6/sq mi (410.7/km$^2$) |
| Cambridge† | Village | Henry | 2,086 | 2,160 | −3.4% | 1.991 | 5.16 | 1,047.7/sq mi (404.5/km$^2$) |
| Camden | Village | Schuyler | 62 | 86 | −27.9% | 0.761 | 1.97 | 81.5/sq mi (31.5/km$^2$) |
| Campbell Hill | Village | Jackson | 309 | 336 | −8.0% | 0.462 | 1.20 | 668.8/sq mi (258.2/km$^2$) |
| Camp Point | Village | Adams | 1,121 | 1,132 | −1.0% | 1.134 | 2.94 | 988.5/sq mi (381.7/km$^2$) |
| Campton Hills | Village | Kane | 10,885 | 11,131 | −2.2% | 16.890 | 43.74 | 644.5/sq mi (248.8/km$^2$) |
| Campus | Village | Livingston | 149 | 166 | −10.2% | 0.092 | 0.24 | 1,619.6/sq mi (625.3/km$^2$) |
| Canton | City | Fulton | 13,242 | 14,704 | −9.9% | 7.858 | 20.35 | 1,685.2/sq mi (650.6/km$^2$) |
| Cantrall | Village | Sangamon | 144 | 139 | +3.6% | 0.250 | 0.65 | 576.0/sq mi (222.4/km$^2$) |
| Capron | Village | Boone | 1,395 | 1,376 | +1.4% | 0.768 | 1.99 | 1,816.4/sq mi (701.3/km$^2$) |
| Carbon Cliff | Village | Rock Island | 1,846 | 2,134 | −13.5% | 2.095 | 5.43 | 881.1/sq mi (340.2/km$^2$) |
| Carbondale | City | Jackson | 21,857 | 25,902 | −15.6% | 17.397 | 45.06 | 1,256.4/sq mi (485.1/km$^2$) |
| Carbon Hill | Village | Grundy | 372 | 345 | +7.8% | 0.178 | 0.46 | 2,089.9/sq mi (806.9/km$^2$) |
| Carlinville† | City | Macoupin | 5,710 | 5,917 | −3.5% | 3.369 | 8.73 | 1,694.9/sq mi (654.4/km$^2$) |
| Carlock | Village | McLean | 548 | 552 | −0.7% | 0.395 | 1.02 | 1,387.3/sq mi (535.7/km$^2$) |
| Carlyle† | City | Clinton | 3,253 | 3,281 | −0.9% | 3.425 | 8.87 | 949.8/sq mi (366.7/km$^2$) |
| Carmi† | City | White | 4,865 | 5,240 | −7.2% | 2.589 | 6.71 | 1,879.1/sq mi (725.5/km$^2$) |
| Carol Stream | Village | DuPage | 39,854 | 39,711 | +0.4% | 9.119 | 23.62 | 4,370.4/sq mi (1,687.4/km$^2$) |
| Carpentersville | Village | Kane | 37,983 | 37,691 | +0.8% | 7.883 | 20.42 | 4,818.3/sq mi (1,860.4/km$^2$) |
| Carrier Mills | Village | Saline | 1,672 | 1,653 | +1.1% | 1.208 | 3.13 | 1,384.1/sq mi (534.4/km$^2$) |
| Carrollton† | City | Greene | 2,485 | 2,484 | 0.0% | 1.902 | 4.93 | 1,306.5/sq mi (504.4/km$^2$) |
| Carterville | City | Williamson | 5,848 | 5,496 | +6.4% | 5.266 | 13.64 | 1,110.5/sq mi (428.8/km$^2$) |
| Carthage† | City | Hancock | 2,490 | 2,605 | −4.4% | 2.491 | 6.45 | 999.6/sq mi (385.9/km$^2$) |
| Cary | Village | McHenry | 17,826 | 18,271 | −2.4% | 6.232 | 16.14 | 2,860.4/sq mi (1,104.4/km$^2$) |
| Casey | City | Clark Cumberland | 2,404 | 2,769 | −13.2% | 2.263 | 5.86 | 1,062.3/sq mi (410.2/km$^2$) |
| Caseyville | Village | St. Clair | 4,400 | 4,245 | +3.7% | 7.266 | 18.82 | 605.6/sq mi (233.8/km$^2$) |
| Catlin | Village | Vermilion | 1,983 | 2,040 | −2.8% | 0.849 | 2.20 | 2,335.7/sq mi (901.8/km$^2$) |
| Cave-In-Rock | Village | Hardin | 228 | 318 | −28.3% | 0.374 | 0.97 | 609.6/sq mi (235.4/km$^2$) |
| Cedar Point | Village | LaSalle | 266 | 277 | −4.0% | 1.021 | 2.64 | 260.5/sq mi (100.6/km$^2$) |
| Cedarville | Village | Stephenson | 663 | 741 | −10.5% | 0.459 | 1.19 | 1,444.4/sq mi (557.7/km$^2$) |
| Central City | Village | Marion | 1,098 | 1,172 | −6.3% | 0.565 | 1.46 | 1,943.4/sq mi (750.3/km$^2$) |
| Centralia | City | Marion Clinton Jefferson Washington | 12,182 | 13,032 | −6.5% | 8.200 | 21.24 | 1,485.6/sq mi (573.6/km$^2$) |
| Cerro Gordo | Village | Piatt | 1,316 | 1,403 | −6.2% | 0.729 | 1.89 | 1,805.2/sq mi (697.0/km$^2$) |
| Chadwick | Village | Carroll | 481 | 551 | −12.7% | 0.311 | 0.81 | 1,546.6/sq mi (597.2/km$^2$) |
| Champaign | City | Champaign | 88,302 | 81,055 | +8.9% | 22.928 | 59.38 | 3,851.3/sq mi (1,487.0/km$^2$) |
| Chandlerville | Village | Cass | 527 | 553 | −4.7% | 0.794 | 2.06 | 663.7/sq mi (256.3/km$^2$) |
| Channahon | Village | Will Grundy | 13,383 | 12,560 | +6.6% | 15.622 | 40.46 | 856.7/sq mi (330.8/km$^2$) |
| Chapin | Village | Morgan | 475 | 512 | −7.2% | 0.998 | 2.58 | 476.0/sq mi (183.8/km$^2$) |
| Charleston† | City | Coles | 17,286 | 21,838 | −20.8% | 8.884 | 23.01 | 1,945.7/sq mi (751.3/km$^2$) |
| Chatham | Village | Sangamon | 14,377 | 11,500 | +25.0% | 7.364 | 19.07 | 1,952.3/sq mi (753.8/km$^2$) |
| Chatsworth | Town | Livingston | 1,185 | 1,205 | −1.7% | 2.757 | 7.14 | 429.8/sq mi (166.0/km$^2$) |
| Chebanse | Village | Kankakee Iroquois | 1,044 | 1,062 | −1.7% | 1.190 | 3.08 | 877.3/sq mi (338.7/km$^2$) |
| Chenoa | City | McLean | 1,720 | 1,785 | −3.6% | 2.430 | 6.29 | 707.8/sq mi (273.3/km$^2$) |
| Cherry | Village | Bureau | 435 | 482 | −9.8% | 0.514 | 1.33 | 846.3/sq mi (326.8/km$^2$) |
| Cherry Valley | Village | Winnebago | 2,905 | 3,162 | −8.1% | 8.405 | 21.77 | 345.6/sq mi (133.4/km$^2$) |
| Chester† | City | Randolph | 6,814 | 8,586 | −20.6% | 5.806 | 15.04 | 1,173.6/sq mi (453.1/km$^2$) |
| Chesterfield | Village | Macoupin | 170 | 188 | −9.6% | 0.541 | 1.40 | 314.2/sq mi (121.3/km$^2$) |
| Chicago† | City | Cook DuPage | 2,746,388 | 2,695,598 | +1.9% | 227.73 | 589.8 | 12,059.8/sq mi (4,656.3/km$^2$) |
| Chicago Heights | City | Cook | 27,480 | 30,276 | −9.2% | 10.283 | 26.63 | 2,672.4/sq mi (1,031.8/km$^2$) |
| Chicago Ridge | Village | Cook | 14,433 | 14,305 | +0.9% | 2.268 | 5.87 | 6,363.8/sq mi (2,457.1/km$^2$) |
| Chillicothe | City | Peoria | 6,128 | 6,097 | +0.5% | 5.274 | 13.66 | 1,161.9/sq mi (448.6/km$^2$) |
| Chrisman | City | Edgar | 1,312 | 1,343 | −2.3% | 0.719 | 1.86 | 1,824.8/sq mi (704.5/km$^2$) |
| Christopher | City | Franklin | 2,697 | 2,382 | +13.2% | 1.622 | 4.20 | 1,662.8/sq mi (642.0/km$^2$) |
| Cicero | Town | Cook | 85,268 | 83,891 | +1.6% | 5.865 | 15.19 | 14,538.4/sq mi (5,613.3/km$^2$) |
| Cisco | Village | Piatt | 254 | 261 | −2.7% | 0.182 | 0.47 | 1,395.6/sq mi (538.8/km$^2$) |
| Cisne | Village | Wayne | 634 | 672 | −5.7% | 0.630 | 1.63 | 1,006.3/sq mi (388.6/km$^2$) |
| Cissna Park | Village | Iroquois | 817 | 846 | −3.4% | 0.725 | 1.88 | 1,126.9/sq mi (435.1/km$^2$) |
| Claremont | Village | Richland | 161 | 176 | −8.5% | 0.793 | 2.05 | 203.0/sq mi (78.4/km$^2$) |
| Clarendon Hills | Village | DuPage | 8,702 | 8,427 | +3.3% | 1.810 | 4.69 | 4,807.7/sq mi (1,856.3/km$^2$) |
| Clay City | Village | Clay | 847 | 959 | −11.7% | 1.782 | 4.62 | 475.3/sq mi (183.5/km$^2$) |
| Clayton | Village | Adams | 639 | 709 | −9.9% | 0.884 | 2.29 | 722.9/sq mi (279.1/km$^2$) |
| Clear Lake | Village | Sangamon | 203 | 229 | −11.4% | 0.092 | 0.24 | 2,206.5/sq mi (851.9/km$^2$) |
| Cleveland | Village | Henry | 163 | 188 | −13.3% | 0.294 | 0.76 | 554.4/sq mi (214.1/km$^2$) |
| Clifton | Village | Iroquois | 1,352 | 1,468 | −7.9% | 0.930 | 2.41 | 1,453.8/sq mi (561.3/km$^2$) |
| Clinton† | City | De Witt | 7,004 | 7,225 | −3.1% | 3.572 | 9.25 | 1,960.8/sq mi (757.1/km$^2$) |
| Coal City | Village | Grundy | 5,705 | 5,587 | +2.1% | 5.617 | 14.55 | 1,015.7/sq mi (392.2/km$^2$) |
| Coalton | Village | Montgomery | 317 | 304 | +4.3% | 0.530 | 1.37 | 598.1/sq mi (230.9/km$^2$) |
| Coal Valley | Village | Rock Island Henry | 3,873 | 3,743 | +3.5% | 3.112 | 8.06 | 1,244.5/sq mi (480.5/km$^2$) |
| Coatsburg | Village | Adams | 150 | 147 | +2.0% | 0.132 | 0.34 | 1,136.4/sq mi (438.8/km$^2$) |
| Cobden | Village | Union | 1,074 | 1,157 | −7.2% | 1.219 | 3.16 | 881.1/sq mi (340.2/km$^2$) |
| Coffeen | City | Montgomery | 647 | 685 | −5.5% | 1.161 | 3.01 | 557.3/sq mi (215.2/km$^2$) |
| Colchester | City | McDonough | 1,108 | 1,401 | −20.9% | 1.150 | 2.98 | 963.5/sq mi (372.0/km$^2$) |
| Coleta | Village | Whiteside | 167 | 164 | +1.8% | 0.370 | 0.96 | 451.4/sq mi (174.3/km$^2$) |
| Colfax | Village | McLean | 996 | 1,061 | −6.1% | 0.553 | 1.43 | 1,801.1/sq mi (695.4/km$^2$) |
| Collinsville | City | Madison St. Clair | 24,366 | 25,579 | −4.7% | 15.077 | 39.05 | 1,616.1/sq mi (624.0/km$^2$) |
| Colona | City | Henry | 5,045 | 5,099 | −1.1% | 3.818 | 9.89 | 1,321.4/sq mi (510.2/km$^2$) |
| Colp | Village | Williamson | 168 | 225 | −25.3% | 0.134 | 0.35 | 1,253.7/sq mi (484.1/km$^2$) |
| Columbia | City | Monroe St. Clair | 10,999 | 9,707 | +13.3% | 10.303 | 26.68 | 1,067.6/sq mi (412.2/km$^2$) |
| Columbus | Village | Adams | 114 | 99 | +15.2% | 0.219 | 0.57 | 520.5/sq mi (201.0/km$^2$) |
| Compton | Village | Lee | 274 | 303 | −9.6% | 0.158 | 0.41 | 1,734.2/sq mi (669.6/km$^2$) |
| Concord | Village | Morgan | 150 | 167 | −10.2% | 0.249 | 0.64 | 602.4/sq mi (232.6/km$^2$) |
| Congerville | Village | Woodford | 497 | 474 | +4.9% | 0.963 | 2.49 | 516.1/sq mi (199.3/km$^2$) |
| Cooksville | Village | McLean | 157 | 182 | −13.7% | 0.217 | 0.56 | 723.5/sq mi (279.3/km$^2$) |
| Cordova | Village | Rock Island | 671 | 672 | −0.1% | 0.574 | 1.49 | 1,169.0/sq mi (451.3/km$^2$) |
| Cornell | Village | Livingston | 446 | 467 | −4.5% | 0.654 | 1.69 | 682.0/sq mi (263.3/km$^2$) |
| Cortland | Town | DeKalb | 4,398 | 4,270 | +3.0% | 3.649 | 9.45 | 1,205.3/sq mi (465.4/km$^2$) |
| Coulterville | Village | Randolph | 834 | 945 | −11.7% | 0.569 | 1.47 | 1,465.7/sq mi (565.9/km$^2$) |
| Country Club Hills | City | Cook | 16,775 | 16,541 | +1.4% | 4.970 | 12.87 | 3,375.3/sq mi (1,303.2/km$^2$) |
| Countryside | City | Cook | 6,420 | 5,895 | +8.9% | 2.878 | 7.45 | 2,230.7/sq mi (861.3/km$^2$) |
| Cowden | Village | Shelby | 515 | 629 | −18.1% | 0.402 | 1.04 | 1,281.1/sq mi (494.6/km$^2$) |
| Crainville | Village | Williamson | 1,443 | 1,254 | +15.1% | 1.653 | 4.28 | 873.0/sq mi (337.1/km$^2$) |
| Creal Springs | City | Williamson | 505 | 543 | −7.0% | 1.027 | 2.66 | 491.7/sq mi (189.9/km$^2$) |
| Crescent City | Village | Iroquois | 552 | 615 | −10.2% | 0.456 | 1.18 | 1,210.5/sq mi (467.4/km$^2$) |
| Crest Hill | City | Will | 20,459 | 20,837 | −1.8% | 9.052 | 23.44 | 2,260.2/sq mi (872.7/km$^2$) |
| Creston | Village | Ogle | 627 | 662 | −5.3% | 1.146 | 2.97 | 547.1/sq mi (211.2/km$^2$) |
| Crestwood | Village | Cook | 10,826 | 10,950 | −1.1% | 3.049 | 7.90 | 3,550.7/sq mi (1,370.9/km$^2$) |
| Crete | Village | Will | 8,465 | 8,259 | +2.5% | 9.409 | 24.37 | 899.7/sq mi (347.4/km$^2$) |
| Creve Coeur | Village | Tazewell | 4,934 | 5,451 | −9.5% | 4.231 | 10.96 | 1,166.2/sq mi (450.3/km$^2$) |
| Crossville | Village | White | 623 | 745 | −16.4% | 0.640 | 1.66 | 973.4/sq mi (375.8/km$^2$) |
| Crystal Lake | City | McHenry | 40,269 | 40,743 | −1.2% | 18.918 | 49.00 | 2,128.6/sq mi (821.9/km$^2$) |
| Cuba | City | Fulton | 1,184 | 1,294 | −8.5% | 0.543 | 1.41 | 2,180.5/sq mi (841.9/km$^2$) |
| Cullom | Village | Livingston | 520 | 555 | −6.3% | 0.335 | 0.87 | 1,552.2/sq mi (599.3/km$^2$) |
| Curran | Village | Sangamon | 213 | 212 | +0.5% | 1.975 | 5.12 | 107.8/sq mi (41.6/km$^2$) |
| Cutler | Village | Perry | 361 | 441 | −18.1% | 0.468 | 1.21 | 771.4/sq mi (297.8/km$^2$) |
| Cypress | Village | Johnson | 217 | 234 | −7.3% | 0.753 | 1.95 | 288.2/sq mi (111.3/km$^2$) |
| Dahlgren | Village | Hamilton | 504 | 525 | −4.0% | 1.017 | 2.63 | 495.6/sq mi (191.3/km$^2$) |
| Dakota | Village | Stephenson | 500 | 506 | −1.2% | 0.249 | 0.64 | 2,008.0/sq mi (775.3/km$^2$) |
| Dallas City | City | Hancock Henderson | 805 | 945 | −14.8% | 2.374 | 6.15 | 339.1/sq mi (130.9/km$^2$) |
| Dalton City | Village | Moultrie | 454 | 544 | −16.5% | 0.534 | 1.38 | 850.2/sq mi (328.3/km$^2$) |
| Dalzell | Village | Bureau | 663 | 717 | −7.5% | 0.820 | 2.12 | 808.5/sq mi (312.2/km$^2$) |
| Damiansville | Village | Clinton | 564 | 491 | +14.9% | 0.822 | 2.13 | 686.1/sq mi (264.9/km$^2$) |
| Dana | Village | LaSalle | 162 | 159 | +1.9% | 0.220 | 0.57 | 736.4/sq mi (284.3/km$^2$) |
| Danforth | Village | Iroquois | 594 | 604 | −1.7% | 0.478 | 1.24 | 1,242.7/sq mi (479.8/km$^2$) |
| Danvers | Village | McLean | 1,089 | 1,154 | −5.6% | 0.803 | 2.08 | 1,356.2/sq mi (523.6/km$^2$) |
| Danville† | City | Vermilion | 29,204 | 33,027 | −11.6% | 17.856 | 46.25 | 1,635.5/sq mi (631.5/km$^2$) |
| Darien | City | DuPage | 22,011 | 22,086 | −0.3% | 6.171 | 15.98 | 3,566.8/sq mi (1,377.2/km$^2$) |
| Davis | Village | Stephenson | 589 | 677 | −13.0% | 0.405 | 1.05 | 1,454.3/sq mi (561.5/km$^2$) |
| Davis Junction | Village | Ogle | 2,512 | 2,373 | +5.9% | 4.200 | 10.88 | 598.1/sq mi (230.9/km$^2$) |
| Dawson | Village | Sangamon | 519 | 509 | +2.0% | 0.792 | 2.05 | 655.3/sq mi (253.0/km$^2$) |
| Decatur† | City | Macon | 70,522 | 76,122 | −7.4% | 42.894 | 111.09 | 1,644.1/sq mi (634.8/km$^2$) |
| Deer Creek | Village | Tazewell | 667 | 704 | −5.3% | 0.535 | 1.39 | 1,246.7/sq mi (481.4/km$^2$) |
| Deerfield | Village | Lake Cook | 19,196 | 18,225 | +5.3% | 5.528 | 14.32 | 3,472.5/sq mi (1,340.7/km$^2$) |
| Deer Grove | Village | Whiteside | 38 | 48 | −20.8% | 0.411 | 1.06 | 92.5/sq mi (35.7/km$^2$) |
| Deer Park | Village | Lake Cook | 3,681 | 3,200 | +15.0% | 3.654 | 9.46 | 1,007.4/sq mi (389.0/km$^2$) |
| DeKalb | City | DeKalb | 40,290 | 43,862 | −8.1% | 16.150 | 41.83 | 2,494.7/sq mi (963.2/km$^2$) |
| De Land | Village | Piatt | 447 | 446 | +0.2% | 0.424 | 1.10 | 1,054.2/sq mi (407.0/km$^2$) |
| Delavan | City | Tazewell | 1,568 | 1,689 | −7.2% | 1.440 | 3.73 | 1,088.9/sq mi (420.4/km$^2$) |
| De Pue | Village | Bureau | 1,633 | 1,838 | −11.2% | 2.775 | 7.19 | 588.5/sq mi (227.2/km$^2$) |
| De Soto | Village | Jackson | 1,407 | 1,590 | −11.5% | 0.912 | 2.36 | 1,542.8/sq mi (595.7/km$^2$) |
| Des Plaines | City | Cook | 60,675 | 58,364 | +4.0% | 14.238 | 36.88 | 4,261.5/sq mi (1,645.4/km$^2$) |
| Detroit | Village | Pike | 76 | 83 | −8.4% | 0.251 | 0.65 | 302.8/sq mi (116.9/km$^2$) |
| De Witt | Village | De Witt | 160 | 184 | −13.0% | 0.237 | 0.61 | 675.1/sq mi (260.7/km$^2$) |
| Diamond | Village | Grundy Will | 2,640 | 2,527 | +4.5% | 1.900 | 4.92 | 1,389.5/sq mi (536.5/km$^2$) |
| Dieterich | Village | Effingham | 890 | 617 | +44.2% | 1.366 | 3.54 | 651.5/sq mi (251.6/km$^2$) |
| Divernon | Village | Sangamon | 1,139 | 1,172 | −2.8% | 0.763 | 1.98 | 1,492.8/sq mi (576.4/km$^2$) |
| Dix | Village | Jefferson | 469 | 461 | +1.7% | 2.074 | 5.37 | 226.1/sq mi (87.3/km$^2$) |
| Dixmoor | Village | Cook | 2,973 | 3,644 | −18.4% | 1.249 | 3.23 | 2,380.3/sq mi (919.0/km$^2$) |
| Dixon† | City | Lee | 15,274 | 15,733 | −2.9% | 7.752 | 20.08 | 1,970.3/sq mi (760.7/km$^2$) |
| Dolton | Village | Cook | 21,426 | 23,153 | −7.5% | 4.571 | 11.84 | 4,687.4/sq mi (1,809.8/km$^2$) |
| Dongola | Village | Union | 661 | 726 | −9.0% | 1.088 | 2.82 | 607.5/sq mi (234.6/km$^2$) |
| Donnellson | Village | Montgomery Bond | 153 | 210 | −27.1% | 0.370 | 0.96 | 413.5/sq mi (159.7/km$^2$) |
| Donovan | Village | Iroquois | 251 | 304 | −17.4% | 0.328 | 0.85 | 765.2/sq mi (295.5/km$^2$) |
| Dorchester | Village | Macoupin | 133 | 151 | −11.9% | 0.722 | 1.87 | 184.2/sq mi (71.1/km$^2$) |
| Dover | Village | Bureau | 135 | 168 | −19.6% | 0.280 | 0.73 | 482.1/sq mi (186.2/km$^2$) |
| Dowell | Village | Jackson | 368 | 408 | −9.8% | 0.390 | 1.01 | 943.6/sq mi (364.3/km$^2$) |
| Downers Grove | Village | DuPage | 50,247 | 47,833 | +5.0% | 14.643 | 37.93 | 3,431.5/sq mi (1,324.9/km$^2$) |
| Downs | Village | McLean | 1,201 | 1,005 | +19.5% | 2.966 | 7.68 | 404.9/sq mi (156.3/km$^2$) |
| Du Bois | Village | Washington | 175 | 205 | −14.6% | 1.052 | 2.72 | 166.3/sq mi (64.2/km$^2$) |
| Dunfermline | Village | Fulton | 262 | 300 | −12.7% | 0.147 | 0.38 | 1,782.3/sq mi (688.2/km$^2$) |
| Dunlap | Village | Peoria | 1,603 | 1,386 | +15.7% | 2.308 | 5.98 | 694.5/sq mi (268.2/km$^2$) |
| Dupo | Village | St. Clair | 3,996 | 4,138 | −3.4% | 6.377 | 16.52 | 626.6/sq mi (241.9/km$^2$) |
| Du Quoin | City | Perry | 5,827 | 6,109 | −4.6% | 6.979 | 18.08 | 834.9/sq mi (322.4/km$^2$) |
| Durand | Village | Winnebago | 1,390 | 1,443 | −3.7% | 0.919 | 2.38 | 1,512.5/sq mi (584.0/km$^2$) |
| Dwight | Village | Livingston Grundy | 4,032 | 4,260 | −5.4% | 3.297 | 8.54 | 1,222.9/sq mi (472.2/km$^2$) |
| Eagarville | Village | Macoupin | 114 | 127 | −10.2% | 0.911 | 2.36 | 125.1/sq mi (48.3/km$^2$) |
| Earlville | City | LaSalle | 1,613 | 1,701 | −5.2% | 1.201 | 3.11 | 1,343.0/sq mi (518.6/km$^2$) |
| East Alton | Village | Madison | 5,786 | 6,301 | −8.2% | 5.318 | 13.77 | 1,088.0/sq mi (420.1/km$^2$) |
| East Brooklyn | Village | Grundy | 80 | 106 | −24.5% | 0.052 | 0.13 | 1,538.5/sq mi (594.0/km$^2$) |
| East Cape Girardeau | Village | Alexander | 289 | 385 | −24.9% | 1.961 | 5.08 | 147.4/sq mi (56.9/km$^2$) |
| East Carondelet | Village | St. Clair | 390 | 499 | −21.8% | 1.177 | 3.05 | 331.4/sq mi (127.9/km$^2$) |
| East Dubuque | City | Jo Daviess | 1,505 | 1,704 | −11.7% | 2.742 | 7.10 | 548.9/sq mi (211.9/km$^2$) |
| East Dundee | Village | Kane Cook | 3,152 | 2,860 | +10.2% | 2.839 | 7.35 | 1,110.3/sq mi (428.7/km$^2$) |
| East Galesburg | Village | Knox | 763 | 812 | −6.0% | 1.365 | 3.54 | 559.0/sq mi (215.8/km$^2$) |
| East Gillespie | Village | Macoupin | 269 | 270 | −0.4% | 0.319 | 0.83 | 843.3/sq mi (325.6/km$^2$) |
| East Hazel Crest | Village | Cook | 1,297 | 1,543 | −15.9% | 0.784 | 2.03 | 1,654.3/sq mi (638.7/km$^2$) |
| East Moline | City | Rock Island | 21,374 | 21,302 | +0.3% | 14.596 | 37.80 | 1,464.4/sq mi (565.4/km$^2$) |
| Easton | Village | Mason | 312 | 321 | −2.8% | 0.240 | 0.62 | 1,300.0/sq mi (501.9/km$^2$) |
| East Peoria | City | Tazewell | 22,484 | 23,402 | −3.9% | 20.411 | 52.86 | 1,101.6/sq mi (425.3/km$^2$) |
| East St. Louis | City | St. Clair | 18,469 | 27,006 | −31.6% | 13.919 | 36.05 | 1,326.9/sq mi (512.3/km$^2$) |
| Eddyville | Village | Pope | 99 | 101 | −2.0% | 0.281 | 0.73 | 352.3/sq mi (136.0/km$^2$) |
| Edgewood | Village | Effingham | 398 | 440 | −9.5% | 1.013 | 2.62 | 392.9/sq mi (151.7/km$^2$) |
| Edinburg | Village | Christian | 1,085 | 1,078 | +0.6% | 0.625 | 1.62 | 1,736.0/sq mi (670.3/km$^2$) |
| Edwardsville† | City | Madison | 26,808 | 24,293 | +10.4% | 19.811 | 51.31 | 1,353.2/sq mi (522.5/km$^2$) |
| Effingham† | City | Effingham | 12,252 | 12,328 | −0.6% | 10.309 | 26.70 | 1,188.5/sq mi (458.9/km$^2$) |
| Elburn | Village | Kane | 6,175 | 5,602 | +10.2% | 3.608 | 9.34 | 1,711.5/sq mi (660.8/km$^2$) |
| El Dara | Village | Pike | 63 | 78 | −19.2% | 1.011 | 2.62 | 62.3/sq mi (24.1/km$^2$) |
| Eldorado | City | Saline | 3,743 | 4,122 | −9.2% | 2.503 | 6.48 | 1,495.4/sq mi (577.4/km$^2$) |
| Eldred | Village | Greene | 149 | 201 | −25.9% | 0.134 | 0.35 | 1,111.9/sq mi (429.3/km$^2$) |
| Elgin | City | Kane Cook | 114,797 | 108,188 | +6.1% | 38.027 | 98.49 | 3,018.8/sq mi (1,165.6/km$^2$) |
| Elizabeth | Village | Jo Daviess | 694 | 761 | −8.8% | 0.900 | 2.33 | 771.1/sq mi (297.7/km$^2$) |
| Elizabethtown† | Village | Hardin | 220 | 299 | −26.4% | 0.705 | 1.83 | 312.1/sq mi (120.5/km$^2$) |
| Elk Grove Village | Village | Cook | 32,812 | 33,127 | −1.0% | 11.639 | 30.14 | 2,819.1/sq mi (1,088.5/km$^2$) |
| Elkhart | Village | Logan | 450 | 405 | +11.1% | 1.942 | 5.03 | 231.7/sq mi (89.5/km$^2$) |
| Elkville | Village | Jackson | 838 | 928 | −9.7% | 0.767 | 1.99 | 1,092.6/sq mi (421.8/km$^2$) |
| Elliott | Village | Ford | 274 | 295 | −7.1% | 0.498 | 1.29 | 550.2/sq mi (212.4/km$^2$) |
| Ellis Grove | Village | Randolph | 328 | 363 | −9.6% | 0.491 | 1.27 | 668.0/sq mi (257.9/km$^2$) |
| Ellisville | Village | Fulton | 87 | 96 | −9.4% | 0.271 | 0.70 | 321.0/sq mi (124.0/km$^2$) |
| Ellsworth | Village | McLean | 184 | 195 | −5.6% | 0.217 | 0.56 | 847.9/sq mi (327.4/km$^2$) |
| Elmhurst | City | DuPage | 45,786 | 44,121 | +3.8% | 10.218 | 26.46 | 4,480.9/sq mi (1,730.1/km$^2$) |
| Elmwood | City | Peoria | 2,058 | 2,097 | −1.9% | 1.396 | 3.62 | 1,474.2/sq mi (569.2/km$^2$) |
| Elmwood Park | Village | Cook | 24,521 | 24,883 | −1.5% | 1.908 | 4.94 | 12,851.7/sq mi (4,962.1/km$^2$) |
| El Paso | City | Woodford | 2,756 | 2,810 | −1.9% | 2.145 | 5.56 | 1,284.8/sq mi (496.1/km$^2$) |
| Elsah | Village | Jersey | 519 | 673 | −22.9% | 1.092 | 2.83 | 475.3/sq mi (183.5/km$^2$) |
| Elvaston | Village | Hancock | 147 | 165 | −10.9% | 0.799 | 2.07 | 184.0/sq mi (71.0/km$^2$) |
| Elwood | Village | Will | 2,229 | 2,279 | −2.2% | 13.641 | 35.33 | 163.4/sq mi (63.1/km$^2$) |
| Emden | Village | Logan | 467 | 485 | −3.7% | 0.235 | 0.61 | 1,987.2/sq mi (767.3/km$^2$) |
| Emington | Village | Livingston | 101 | 117 | −13.7% | 0.083 | 0.21 | 1,216.9/sq mi (469.8/km$^2$) |
| Energy | Village | Williamson | 974 | 1,146 | −15.0% | 1.194 | 3.09 | 815.7/sq mi (315.0/km$^2$) |
| Enfield | Village | White | 794 | 596 | +33.2% | 1.011 | 2.62 | 785.4/sq mi (303.2/km$^2$) |
| Equality | Village | Gallatin | 539 | 595 | −9.4% | 0.877 | 2.27 | 614.6/sq mi (237.3/km$^2$) |
| Erie | Village | Whiteside | 1,518 | 1,602 | −5.2% | 1.380 | 3.57 | 1,100.0/sq mi (424.7/km$^2$) |
| Essex | Village | Kankakee | 841 | 802 | +4.9% | 2.327 | 6.03 | 361.4/sq mi (139.5/km$^2$) |
| Eureka† | City | Woodford | 5,227 | 5,295 | −1.3% | 2.684 | 6.95 | 1,947.5/sq mi (751.9/km$^2$) |
| Evanston | City | Cook | 78,110 | 74,486 | +4.9% | 7.779 | 20.15 | 10,041.1/sq mi (3,876.9/km$^2$) |
| Evansville | Village | Randolph | 547 | 701 | −22.0% | 0.788 | 2.04 | 694.2/sq mi (268.0/km$^2$) |
| Evergreen Park | Village | Cook | 19,943 | 19,852 | +0.5% | 3.163 | 8.19 | 6,305.1/sq mi (2,434.4/km$^2$) |
| Ewing | Village | Franklin | 300 | 307 | −2.3% | 1.009 | 2.61 | 297.3/sq mi (114.8/km$^2$) |
| Exeter | Village | Scott | 87 | 65 | +33.8% | 0.690 | 1.79 | 126.1/sq mi (48.7/km$^2$) |
| Fairbury | City | Livingston | 3,633 | 3,757 | −3.3% | 1.809 | 4.69 | 2,008.3/sq mi (775.4/km$^2$) |
| Fairfield† | City | Wayne | 4,883 | 5,154 | −5.3% | 4.028 | 10.43 | 1,212.3/sq mi (468.1/km$^2$) |
| Fairmont City | Village | St. Clair Madison | 2,265 | 2,635 | −14.0% | 6.205 | 16.07 | 365.0/sq mi (140.9/km$^2$) |
| Fairmount | Village | Vermilion | 612 | 642 | −4.7% | 0.317 | 0.82 | 1,930.6/sq mi (745.4/km$^2$) |
| Fairview | Village | Fulton | 426 | 522 | −18.4% | 4.215 | 10.92 | 101.1/sq mi (39.0/km$^2$) |
| Fairview Heights | City | St. Clair | 16,706 | 17,078 | −2.2% | 11.431 | 29.61 | 1,461.5/sq mi (564.3/km$^2$) |
| Farina | Village | Fayette | 540 | 518 | +4.2% | 1.457 | 3.77 | 370.6/sq mi (143.1/km$^2$) |
| Farmer City | City | De Witt | 1,828 | 2,037 | −10.3% | 2.395 | 6.20 | 763.3/sq mi (294.7/km$^2$) |
| Farmersville | Village | Montgomery | 689 | 724 | −4.8% | 0.703 | 1.82 | 980.1/sq mi (378.4/km$^2$) |
| Farmington | City | Fulton | 2,389 | 2,448 | −2.4% | 1.505 | 3.90 | 1,587.4/sq mi (612.9/km$^2$) |
| Fayetteville | Village | St. Clair | 302 | 366 | −17.5% | 0.296 | 0.77 | 1,020.3/sq mi (393.9/km$^2$) |
| Ferris | Village | Hancock | 127 | 156 | −18.6% | 1.967 | 5.09 | 64.6/sq mi (24.9/km$^2$) |
| Fidelity | Village | Jersey | 96 | 114 | −15.8% | 0.101 | 0.26 | 950.5/sq mi (367.0/km$^2$) |
| Fieldon | Village | Jersey | 176 | 239 | −26.4% | 0.202 | 0.52 | 871.3/sq mi (336.4/km$^2$) |
| Fillmore | Village | Montgomery | 305 | 330 | −7.6% | 1.016 | 2.63 | 300.2/sq mi (115.9/km$^2$) |
| Findlay | Village | Shelby | 664 | 683 | −2.8% | 0.924 | 2.39 | 718.6/sq mi (277.5/km$^2$) |
| Fisher | Village | Champaign | 2,062 | 1,881 | +9.6% | 1.330 | 3.44 | 1,550.4/sq mi (598.6/km$^2$) |
| Fithian | Village | Vermilion | 488 | 485 | +0.6% | 0.383 | 0.99 | 1,274.2/sq mi (492.0/km$^2$) |
| Flanagan | Village | Livingston | 1,010 | 1,110 | −9.0% | 0.574 | 1.49 | 1,759.6/sq mi (679.4/km$^2$) |
| Flat Rock | Village | Crawford | 323 | 331 | −2.4% | 0.856 | 2.22 | 377.3/sq mi (145.7/km$^2$) |
| Flora | City | Clay | 4,803 | 5,070 | −5.3% | 4.690 | 12.15 | 1,024.1/sq mi (395.4/km$^2$) |
| Florence | Village | Pike | 17 | 38 | −55.3% | 0.276 | 0.71 | 61.6/sq mi (23.8/km$^2$) |
| Flossmoor | Village | Cook | 9,704 | 9,464 | +2.5% | 3.661 | 9.48 | 2,650.6/sq mi (1,023.4/km$^2$) |
| Foosland | Village | Champaign | 75 | 101 | −25.7% | 0.069 | 0.18 | 1,087.0/sq mi (419.7/km$^2$) |
| Ford Heights | Village | Cook | 1,813 | 2,763 | −34.4% | 1.946 | 5.04 | 931.7/sq mi (359.7/km$^2$) |
| Forest City | Village | Mason | 222 | 246 | −9.8% | 0.523 | 1.35 | 424.5/sq mi (163.9/km$^2$) |
| Forest Park | Village | Cook | 14,339 | 14,167 | +1.2% | 2.402 | 6.22 | 5,969.6/sq mi (2,304.9/km$^2$) |
| Forest View | Village | Cook | 792 | 698 | +13.5% | 1.168 | 3.03 | 678.1/sq mi (261.8/km$^2$) |
| Forrest | Village | Livingston | 1,041 | 1,220 | −14.7% | 0.648 | 1.68 | 1,606.5/sq mi (620.3/km$^2$) |
| Forreston | Village | Ogle | 1,435 | 1,446 | −0.8% | 0.943 | 2.44 | 1,521.7/sq mi (587.5/km$^2$) |
| Forsyth | Village | Macon | 3,734 | 3,490 | +7.0% | 3.130 | 8.11 | 1,193.0/sq mi (460.6/km$^2$) |
| Fox Lake | Village | Lake McHenry | 10,978 | 10,579 | +3.8% | 7.833 | 20.29 | 1,401.5/sq mi (541.1/km$^2$) |
| Fox River Grove | Village | McHenry Lake | 4,702 | 4,854 | −3.1% | 1.711 | 4.43 | 2,748.1/sq mi (1,061.0/km$^2$) |
| Frankfort | Village | Will | 20,296 | 17,782 | +14.1% | 15.788 | 40.89 | 1,285.5/sq mi (496.3/km$^2$) |
| Franklin | Village | Morgan | 610 | 610 | 0.0% | 0.829 | 2.15 | 735.8/sq mi (284.1/km$^2$) |
| Franklin Grove | Village | Lee | 896 | 1,021 | −12.2% | 0.467 | 1.21 | 1,918.6/sq mi (740.8/km$^2$) |
| Franklin Park | Village | Cook | 18,467 | 18,333 | +0.7% | 4.772 | 12.36 | 3,869.9/sq mi (1,494.2/km$^2$) |
| Freeburg | Village | St. Clair | 4,582 | 4,354 | +5.2% | 6.836 | 17.71 | 670.3/sq mi (258.8/km$^2$) |
| Freeman Spur | Village | Williamson Franklin | 268 | 287 | −6.6% | 0.399 | 1.03 | 671.7/sq mi (259.3/km$^2$) |
| Freeport† | City | Stephenson | 23,973 | 25,638 | −6.5% | 11.881 | 30.77 | 2,017.8/sq mi (779.1/km$^2$) |
| Fulton | City | Whiteside | 3,647 | 3,481 | +4.8% | 2.338 | 6.06 | 1,559.9/sq mi (602.3/km$^2$) |
| Fults | Village | Monroe | 28 | 26 | +7.7% | 0.053 | 0.14 | 528.3/sq mi (204.0/km$^2$) |
| Galatia | Village | Saline | 827 | 933 | −11.4% | 1.952 | 5.06 | 423.7/sq mi (163.6/km$^2$) |
| Galena† | City | Jo Daviess | 3,308 | 3,429 | −3.5% | 4.492 | 11.63 | 736.4/sq mi (284.3/km$^2$) |
| Galesburg† | City | Knox | 30,052 | 32,195 | −6.7% | 17.743 | 45.95 | 1,693.7/sq mi (654.0/km$^2$) |
| Galva | City | Henry | 2,470 | 2,589 | −4.6% | 2.755 | 7.14 | 896.6/sq mi (346.2/km$^2$) |
| Gardner | Village | Grundy | 1,366 | 1,463 | −6.6% | 2.912 | 7.54 | 469.1/sq mi (181.1/km$^2$) |
| Garrett | Village | Douglas | 122 | 162 | −24.7% | 0.108 | 0.28 | 1,129.6/sq mi (436.2/km$^2$) |
| Gays | Village | Moultrie | 218 | 281 | −22.4% | 0.386 | 1.00 | 564.8/sq mi (218.1/km$^2$) |
| Geneseo | City | Henry | 6,539 | 6,586 | −0.7% | 4.646 | 12.03 | 1,407.4/sq mi (543.4/km$^2$) |
| Geneva† | City | Kane | 21,393 | 21,495 | −0.5% | 9.919 | 25.69 | 2,156.8/sq mi (832.7/km$^2$) |
| Genoa | City | DeKalb | 5,298 | 5,193 | +2.0% | 2.590 | 6.71 | 2,045.6/sq mi (789.8/km$^2$) |
| Georgetown | City | Vermilion | 3,143 | 3,474 | −9.5% | 1.616 | 4.19 | 1,944.9/sq mi (750.9/km$^2$) |
| Germantown | Village | Clinton | 1,324 | 1,269 | +4.3% | 1.014 | 2.63 | 1,305.7/sq mi (504.1/km$^2$) |
| Germantown Hills | Village | Woodford | 3,412 | 3,438 | −0.8% | 1.636 | 4.24 | 2,085.6/sq mi (805.2/km$^2$) |
| German Valley | Village | Stephenson | 433 | 463 | −6.5% | 0.478 | 1.24 | 905.9/sq mi (349.8/km$^2$) |
| Gibson City | City | Ford | 3,475 | 3,407 | +2.0% | 2.321 | 6.01 | 1,497.2/sq mi (578.1/km$^2$) |
| Gifford | Village | Champaign | 911 | 975 | −6.6% | 0.444 | 1.15 | 2,051.8/sq mi (792.2/km$^2$) |
| Gilberts | Village | Kane | 8,366 | 6,879 | +21.6% | 5.489 | 14.22 | 1,524.1/sq mi (588.5/km$^2$) |
| Gillespie | City | Macoupin | 3,168 | 3,319 | −4.5% | 1.484 | 3.84 | 2,134.8/sq mi (824.2/km$^2$) |
| Gilman | City | Iroquois | 1,738 | 1,814 | −4.2% | 2.433 | 6.30 | 714.3/sq mi (275.8/km$^2$) |
| Girard | City | Macoupin | 1,785 | 2,103 | −15.1% | 0.934 | 2.42 | 1,911.1/sq mi (737.9/km$^2$) |
| Gladstone | Village | Henderson | 234 | 281 | −16.7% | 0.360 | 0.93 | 650.0/sq mi (251.0/km$^2$) |
| Glasford | Village | Peoria | 866 | 1,022 | −15.3% | 0.908 | 2.35 | 953.7/sq mi (368.2/km$^2$) |
| Glasgow | Village | Scott | 113 | 141 | −19.9% | 1.011 | 2.62 | 111.8/sq mi (43.2/km$^2$) |
| Glen Carbon | Village | Madison | 13,842 | 12,934 | +7.0% | 10.250 | 26.55 | 1,350.4/sq mi (521.4/km$^2$) |
| Glencoe | Village | Cook | 8,849 | 8,723 | +1.4% | 3.718 | 9.63 | 2,380.0/sq mi (918.9/km$^2$) |
| Glendale Heights | Village | DuPage | 33,176 | 34,208 | −3.0% | 5.385 | 13.95 | 6,160.8/sq mi (2,378.7/km$^2$) |
| Glen Ellyn | Village | DuPage | 28,846 | 27,450 | +5.1% | 6.850 | 17.74 | 4,211.1/sq mi (1,625.9/km$^2$) |
| Glenview | Village | Cook | 48,705 | 44,692 | +9.0% | 14.001 | 36.26 | 3,478.7/sq mi (1,343.1/km$^2$) |
| Glenwood | Village | Cook | 8,662 | 8,969 | −3.4% | 3.264 | 8.45 | 2,653.8/sq mi (1,024.6/km$^2$) |
| Godfrey | Village | Madison | 17,825 | 17,982 | −0.9% | 34.395 | 89.08 | 518.2/sq mi (200.1/km$^2$) |
| Godley | Village | Will Grundy | 566 | 601 | −5.8% | 1.083 | 2.80 | 522.6/sq mi (201.8/km$^2$) |
| Golconda† | City | Pope | 630 | 668 | −5.7% | 0.510 | 1.32 | 1,235.3/sq mi (476.9/km$^2$) |
| Golden | Village | Adams | 648 | 644 | +0.6% | 0.642 | 1.66 | 1,009.3/sq mi (389.7/km$^2$) |
| Golden Gate | Village | Wayne | 65 | 68 | −4.4% | 0.079 | 0.20 | 822.8/sq mi (317.7/km$^2$) |
| Golf | Village | Cook | 514 | 500 | +2.8% | 0.448 | 1.16 | 1,147.3/sq mi (443.0/km$^2$) |
| Goodfield | Village | Woodford Tazewell | 936 | 860 | +8.8% | 1.622 | 4.20 | 577.1/sq mi (222.8/km$^2$) |
| Good Hope | Village | McDonough | 363 | 396 | −8.3% | 0.300 | 0.78 | 1,210.0/sq mi (467.2/km$^2$) |
| Goreville | Village | Johnson | 1,068 | 1,049 | +1.8% | 2.686 | 6.96 | 397.6/sq mi (153.5/km$^2$) |
| Gorham | Village | Jackson | 173 | 236 | −26.7% | 1.219 | 3.16 | 141.9/sq mi (54.8/km$^2$) |
| Grafton | City | Jersey | 626 | 674 | −7.1% | 3.712 | 9.61 | 168.6/sq mi (65.1/km$^2$) |
| Grand Ridge | Village | LaSalle | 515 | 560 | −8.0% | 0.462 | 1.20 | 1,114.7/sq mi (430.4/km$^2$) |
| Grand Tower | City | Jackson | 479 | 605 | −20.8% | 1.248 | 3.23 | 383.8/sq mi (148.2/km$^2$) |
| Grandview | Village | Sangamon | 1,405 | 1,441 | −2.5% | 0.335 | 0.87 | 4,194.0/sq mi (1,619.3/km$^2$) |
| Granite City | City | Madison | 27,549 | 29,849 | −7.7% | 19.024 | 49.27 | 1,448.1/sq mi (559.1/km$^2$) |
| Grantfork | Village | Madison | 341 | 337 | +1.2% | 0.337 | 0.87 | 1,011.9/sq mi (390.7/km$^2$) |
| Grant Park | Village | Kankakee | 1,294 | 1,331 | −2.8% | 3.413 | 8.84 | 379.1/sq mi (146.4/km$^2$) |
| Granville | Village | Putnam | 1,359 | 1,427 | −4.8% | 1.307 | 3.39 | 1,039.8/sq mi (401.5/km$^2$) |
| Grayslake | Village | Lake | 21,248 | 20,957 | +1.4% | 10.900 | 28.23 | 1,949.4/sq mi (752.7/km$^2$) |
| Grayville | City | Edwards White | 1,550 | 1,666 | −7.0% | 2.127 | 5.51 | 728.7/sq mi (281.4/km$^2$) |
| Greenfield | City | Greene | 1,059 | 1,071 | −1.1% | 1.714 | 4.44 | 617.9/sq mi (238.6/km$^2$) |
| Green Oaks | Village | Lake | 4,128 | 3,866 | +6.8% | 3.985 | 10.32 | 1,035.9/sq mi (400.0/km$^2$) |
| Greenup | Village | Cumberland | 1,365 | 1,513 | −9.8% | 1.750 | 4.53 | 780.0/sq mi (301.2/km$^2$) |
| Green Valley | Village | Tazewell | 630 | 709 | −11.1% | 0.301 | 0.78 | 2,093.0/sq mi (808.1/km$^2$) |
| Greenview | Village | Menard | 745 | 778 | −4.2% | 0.859 | 2.22 | 867.3/sq mi (334.9/km$^2$) |
| Greenville† | City | Bond | 7,083 | 7,000 | +1.2% | 6.309 | 16.34 | 1,122.7/sq mi (433.5/km$^2$) |
| Greenwood | Village | McHenry | 324 | 255 | +27.1% | 2.632 | 6.82 | 123.1/sq mi (47.5/km$^2$) |
| Gridley | Village | McLean | 1,456 | 1,432 | +1.7% | 1.233 | 3.19 | 1,180.9/sq mi (455.9/km$^2$) |
| Griggsville | City | Pike | 1,097 | 1,226 | −10.5% | 1.106 | 2.86 | 991.9/sq mi (383.0/km$^2$) |
| Gulfport | Village | Henderson | 42 | 54 | −22.2% | 1.412 | 3.66 | 29.7/sq mi (11.5/km$^2$) |
| Gurnee | Village | Lake | 30,706 | 31,295 | −1.9% | 13.503 | 34.97 | 2,274.0/sq mi (878.0/km$^2$) |
| Hainesville | Village | Lake | 3,546 | 3,597 | −1.4% | 1.847 | 4.78 | 1,919.9/sq mi (741.3/km$^2$) |
| Hamburg | Village | Calhoun | 99 | 128 | −22.7% | 0.522 | 1.35 | 189.7/sq mi (73.2/km$^2$) |
| Hamel | Village | Madison | 929 | 816 | +13.8% | 1.190 | 3.08 | 780.7/sq mi (301.4/km$^2$) |
| Hamilton | City | Hancock | 2,753 | 2,951 | −6.7% | 3.561 | 9.22 | 773.1/sq mi (298.5/km$^2$) |
| Hammond | Village | Piatt | 508 | 509 | −0.2% | 0.757 | 1.96 | 671.1/sq mi (259.1/km$^2$) |
| Hampshire | Village | Kane | 7,667 | 5,563 | +37.8% | 9.505 | 24.62 | 806.6/sq mi (311.4/km$^2$) |
| Hampton | Village | Rock Island | 1,779 | 1,863 | −4.5% | 1.461 | 3.78 | 1,217.7/sq mi (470.1/km$^2$) |
| Hanaford | Village | Franklin | 320 | 327 | −2.1% | 1.008 | 2.61 | 317.5/sq mi (122.6/km$^2$) |
| Hanna City | Village | Peoria | 1,253 | 1,225 | +2.3% | 1.278 | 3.31 | 980.4/sq mi (378.5/km$^2$) |
| Hanover | Village | Jo Daviess | 863 | 844 | +2.3% | 1.122 | 2.91 | 769.2/sq mi (297.0/km$^2$) |
| Hanover Park | Village | DuPage | 37,470 | 37,973 | −1.3% | 6.422 | 16.63 | 5,834.6/sq mi (2,252.8/km$^2$) |
| Hardin† | Village | Calhoun | 801 | 967 | −17.2% | 2.128 | 5.51 | 376.4/sq mi (145.3/km$^2$) |
| Harmon | Village | Lee | 111 | 120 | −7.5% | 0.149 | 0.39 | 745.0/sq mi (287.6/km$^2$) |
| Harrisburg† | City | Saline | 8,219 | 9,017 | −8.8% | 6.612 | 17.13 | 1,243.0/sq mi (479.9/km$^2$) |
| Harristown | Village | Macon | 1,310 | 1,367 | −4.2% | 1.797 | 4.65 | 729.0/sq mi (281.5/km$^2$) |
| Hartford | Village | Madison | 1,185 | 1,429 | −17.1% | 5.166 | 13.38 | 229.4/sq mi (88.6/km$^2$) |
| Hartsburg | Village | Logan | 262 | 314 | −16.6% | 0.150 | 0.39 | 1,746.7/sq mi (674.4/km$^2$) |
| Harvard | City | McHenry | 9,469 | 9,447 | +0.2% | 8.355 | 21.64 | 1,133.3/sq mi (437.6/km$^2$) |
| Harvel | Village | Montgomery Christian | 178 | 223 | −20.2% | 0.718 | 1.86 | 247.9/sq mi (95.7/km$^2$) |
| Harvey | City | Cook | 20,324 | 25,282 | −19.6% | 6.206 | 16.07 | 3,274.9/sq mi (1,264.4/km$^2$) |
| Harwood Heights | Village | Cook | 9,065 | 8,612 | +5.3% | 0.825 | 2.14 | 10,987.9/sq mi (4,242.4/km$^2$) |
| Havana† | City | Mason | 2,963 | 3,301 | −10.2% | 2.776 | 7.19 | 1,067.4/sq mi (412.1/km$^2$) |
| Hawthorn Woods | Village | Lake | 9,062 | 7,663 | +18.3% | 8.046 | 20.84 | 1,126.3/sq mi (434.9/km$^2$) |
| Hazel Crest | Village | Cook | 13,382 | 14,100 | −5.1% | 3.397 | 8.80 | 3,939.4/sq mi (1,521.0/km$^2$) |
| Hebron | Village | McHenry | 1,368 | 1,216 | +12.5% | 1.931 | 5.00 | 708.4/sq mi (273.5/km$^2$) |
| Hecker | Village | Monroe | 429 | 481 | −10.8% | 0.253 | 0.66 | 1,695.7/sq mi (654.7/km$^2$) |
| Henderson | Village | Knox | 266 | 255 | +4.3% | 0.265 | 0.69 | 1,003.8/sq mi (387.6/km$^2$) |
| Hennepin† | Village | Putnam | 769 | 757 | +1.6% | 5.307 | 13.75 | 144.9/sq mi (55.9/km$^2$) |
| Henning | Village | Vermilion | 210 | 251 | −16.3% | 1.524 | 3.95 | 137.8/sq mi (53.2/km$^2$) |
| Henry | City | Marshall | 2,320 | 2,464 | −5.8% | 1.797 | 4.65 | 1,291.0/sq mi (498.5/km$^2$) |
| Herrick | Village | Shelby | 358 | 436 | −17.9% | 0.366 | 0.95 | 978.1/sq mi (377.7/km$^2$) |
| Herrin | City | Williamson | 12,352 | 12,501 | −1.2% | 9.673 | 25.05 | 1,277.0/sq mi (493.0/km$^2$) |
| Herscher | Village | Kankakee | 1,521 | 1,591 | −4.4% | 1.813 | 4.70 | 838.9/sq mi (323.9/km$^2$) |
| Hettick | Village | Macoupin | 149 | 181 | −17.7% | 0.365 | 0.95 | 408.2/sq mi (157.6/km$^2$) |
| Heyworth | Village | McLean | 2,791 | 2,841 | −1.8% | 3.026 | 7.84 | 922.3/sq mi (356.1/km$^2$) |
| Hickory Hills | City | Cook | 14,505 | 14,049 | +3.2% | 2.844 | 7.37 | 5,100.2/sq mi (1,969.2/km$^2$) |
| Hidalgo | Village | Jasper | 111 | 106 | +4.7% | 0.344 | 0.89 | 322.7/sq mi (124.6/km$^2$) |
| Highland | City | Madison | 9,991 | 9,919 | +0.7% | 6.751 | 17.49 | 1,479.9/sq mi (571.4/km$^2$) |
| Highland Park | City | Lake | 30,176 | 29,763 | +1.4% | 12.241 | 31.70 | 2,465.2/sq mi (951.8/km$^2$) |
| Highwood | City | Lake | 5,074 | 5,405 | −6.1% | 0.721 | 1.87 | 7,037.4/sq mi (2,717.2/km$^2$) |
| Hillcrest | Village | Ogle | 1,224 | 1,326 | −7.7% | 3.549 | 9.19 | 344.9/sq mi (133.2/km$^2$) |
| Hillsboro† | City | Montgomery | 5,902 | 6,207 | −4.9% | 8.262 | 21.40 | 714.4/sq mi (275.8/km$^2$) |
| Hillsdale | Village | Rock Island | 417 | 523 | −20.3% | 0.648 | 1.68 | 643.5/sq mi (248.5/km$^2$) |
| Hillside | Village | Cook | 8,320 | 8,157 | +2.0% | 3.168 | 8.21 | 2,626.3/sq mi (1,014.0/km$^2$) |
| Hillview | Village | Greene | 94 | 193 | −51.3% | 0.816 | 2.11 | 115.2/sq mi (44.5/km$^2$) |
| Hinckley | Village | DeKalb | 2,006 | 2,070 | −3.1% | 0.847 | 2.19 | 2,368.4/sq mi (914.4/km$^2$) |
| Hindsboro | Village | Douglas | 275 | 313 | −12.1% | 0.269 | 0.70 | 1,022.3/sq mi (394.7/km$^2$) |
| Hinsdale | Village | DuPage Cook | 17,395 | 16,816 | +3.4% | 4.623 | 11.97 | 3,762.7/sq mi (1,452.8/km$^2$) |
| Hodgkins | Village | Cook | 1,500 | 1,897 | −20.9% | 2.712 | 7.02 | 553.1/sq mi (213.6/km$^2$) |
| Hoffman | Village | Clinton | 439 | 508 | −13.6% | 0.506 | 1.31 | 867.6/sq mi (335.0/km$^2$) |
| Hoffman Estates | Village | Cook | 52,530 | 51,895 | +1.2% | 21.065 | 54.56 | 2,493.7/sq mi (962.8/km$^2$) |
| Holiday Hills | Village | McHenry | 618 | 610 | +1.3% | 0.934 | 2.42 | 661.7/sq mi (255.5/km$^2$) |
| Hollowayville | Village | Bureau | 36 | 84 | −57.1% | 0.049 | 0.13 | 734.7/sq mi (283.7/km$^2$) |
| Homer | Village | Champaign | 1,073 | 1,193 | −10.1% | 0.980 | 2.54 | 1,094.9/sq mi (422.7/km$^2$) |
| Homer Glen | Village | Will | 24,543 | 24,220 | +1.3% | 22.125 | 57.30 | 1,109.3/sq mi (428.3/km$^2$) |
| Hometown | City | Cook | 4,343 | 4,349 | −0.1% | 0.479 | 1.24 | 9,066.8/sq mi (3,500.7/km$^2$) |
| Homewood | Village | Cook | 19,463 | 19,323 | +0.7% | 5.216 | 13.51 | 3,731.4/sq mi (1,440.7/km$^2$) |
| Hoopeston | City | Vermilion | 4,915 | 5,351 | −8.1% | 3.686 | 9.55 | 1,333.4/sq mi (514.8/km$^2$) |
| Hooppole | Village | Henry | 180 | 204 | −11.8% | 0.372 | 0.96 | 483.9/sq mi (186.8/km$^2$) |
| Hopedale | Village | Tazewell | 830 | 865 | −4.0% | 0.882 | 2.28 | 941.0/sq mi (363.3/km$^2$) |
| Hopewell | Village | Marshall | 421 | 410 | +2.7% | 1.135 | 2.94 | 370.9/sq mi (143.2/km$^2$) |
| Hopkins Park | Village | Kankakee | 597 | 603 | −1.0% | 4.137 | 10.71 | 144.3/sq mi (55.7/km$^2$) |
| Hoyleton | Village | Washington | 520 | 531 | −2.1% | 0.760 | 1.97 | 684.2/sq mi (264.2/km$^2$) |
| Hudson | Village | McLean | 1,753 | 1,838 | −4.6% | 0.818 | 2.12 | 2,143.0/sq mi (827.4/km$^2$) |
| Huey | Village | Clinton | 160 | 169 | −5.3% | 0.216 | 0.56 | 740.7/sq mi (286.0/km$^2$) |
| Hull | Village | Pike | 392 | 461 | −15.0% | 1.825 | 4.73 | 214.8/sq mi (82.9/km$^2$) |
| Humboldt | Village | Coles | 361 | 437 | −17.4% | 0.343 | 0.89 | 1,052.5/sq mi (406.4/km$^2$) |
| Hume | Village | Edgar | 325 | 380 | −14.5% | 0.566 | 1.47 | 574.2/sq mi (221.7/km$^2$) |
| Huntley | Village | McHenry Kane | 27,740 | 24,291 | +14.2% | 14.289 | 37.01 | 1,941.4/sq mi (749.6/km$^2$) |
| Hurst | City | Williamson | 764 | 795 | −3.9% | 0.887 | 2.30 | 861.3/sq mi (332.6/km$^2$) |
| Hutsonville | Village | Crawford | 478 | 554 | −13.7% | 0.622 | 1.61 | 768.5/sq mi (296.7/km$^2$) |
| Illiopolis | Village | Sangamon | 846 | 891 | −5.1% | 0.677 | 1.75 | 1,249.6/sq mi (482.5/km$^2$) |
| Ina | Village | Jefferson | 1,641 | 2,338 | −29.8% | 2.405 | 6.23 | 682.3/sq mi (263.4/km$^2$) |
| Indian Creek | Village | Lake | 536 | 462 | +16.0% | 0.267 | 0.69 | 2,007.5/sq mi (775.1/km$^2$) |
| Indian Head Park | Village | Cook | 4,065 | 3,809 | +6.7% | 0.930 | 2.41 | 4,371.0/sq mi (1,687.6/km$^2$) |
| Indianola | Village | Vermilion | 227 | 276 | −17.8% | 0.388 | 1.00 | 585.1/sq mi (225.9/km$^2$) |
| Industry | Village | McDonough | 399 | 478 | −16.5% | 0.460 | 1.19 | 867.4/sq mi (334.9/km$^2$) |
| Inverness | Village | Cook | 7,616 | 7,399 | +2.9% | 6.534 | 16.92 | 1,165.6/sq mi (450.0/km$^2$) |
| Iola | Village | Clay | 98 | 141 | −30.5% | 0.964 | 2.50 | 101.7/sq mi (39.3/km$^2$) |
| Ipava | Village | Fulton | 447 | 470 | −4.9% | 0.268 | 0.69 | 1,667.9/sq mi (644.0/km$^2$) |
| Iroquois | Village | Iroquois | 133 | 154 | −13.6% | 0.567 | 1.47 | 234.6/sq mi (90.6/km$^2$) |
| Irving | Village | Montgomery | 373 | 495 | −24.6% | 0.897 | 2.32 | 415.8/sq mi (160.6/km$^2$) |
| Irvington | Village | Washington | 581 | 659 | −11.8% | 1.010 | 2.62 | 575.2/sq mi (222.1/km$^2$) |
| Irwin | Village | Kankakee | 68 | 74 | −8.1% | 0.045 | 0.12 | 1,511.1/sq mi (583.4/km$^2$) |
| Island Lake | Village | Lake McHenry | 8,051 | 8,080 | −0.4% | 3.348 | 8.67 | 2,404.7/sq mi (928.5/km$^2$) |
| Itasca | Village | DuPage | 9,543 | 8,649 | +10.3% | 5.022 | 13.01 | 1,900.2/sq mi (733.7/km$^2$) |
| Iuka | Village | Marion | 512 | 489 | +4.7% | 0.733 | 1.90 | 698.5/sq mi (269.7/km$^2$) |
| Ivesdale | Village | Champaign | 265 | 267 | −0.7% | 0.716 | 1.85 | 370.1/sq mi (142.9/km$^2$) |
| Jacksonville† | City | Morgan | 17,616 | 19,446 | −9.4% | 10.563 | 27.36 | 1,667.7/sq mi (643.9/km$^2$) |
| Jeffersonville | Village | Wayne | 355 | 367 | −3.3% | 1.012 | 2.62 | 350.8/sq mi (135.4/km$^2$) |
| Jeisyville | Village | Christian | 102 | 107 | −4.7% | 0.122 | 0.32 | 836.1/sq mi (322.8/km$^2$) |
| Jerome | Village | Sangamon | 1,692 | 1,656 | +2.2% | 0.462 | 1.20 | 3,662.3/sq mi (1,414.0/km$^2$) |
| Jerseyville† | City | Jersey | 8,337 | 8,465 | −1.5% | 5.237 | 13.56 | 1,591.9/sq mi (614.7/km$^2$) |
| Jewett | Village | Cumberland | 196 | 223 | −12.1% | 1.005 | 2.60 | 195.0/sq mi (75.3/km$^2$) |
| Johnsburg | Village | McHenry | 6,355 | 6,337 | +0.3% | 7.163 | 18.55 | 887.2/sq mi (342.5/km$^2$) |
| Johnsonville | Village | Wayne | 72 | 77 | −6.5% | 0.213 | 0.55 | 338.0/sq mi (130.5/km$^2$) |
| Johnston City | City | Williamson | 3,384 | 3,543 | −4.5% | 2.116 | 5.48 | 1,599.2/sq mi (617.5/km$^2$) |
| Joliet† | City | Will Kendall | 150,362 | 147,433 | +2.0% | 64.516 | 167.10 | 2,330.6/sq mi (899.9/km$^2$) |
| Jonesboro† | City | Union | 1,711 | 1,821 | −6.0% | 2.700 | 6.99 | 633.7/sq mi (244.7/km$^2$) |
| Joppa | Village | Massac | 350 | 360 | −2.8% | 0.486 | 1.26 | 720.2/sq mi (278.1/km$^2$) |
| Joy | Village | Mercer | 372 | 417 | −10.8% | 0.428 | 1.11 | 869.2/sq mi (335.6/km$^2$) |
| Junction | Village | Gallatin | 56 | 129 | −56.6% | 0.826 | 2.14 | 67.8/sq mi (26.2/km$^2$) |
| Junction City | Village | Marion | 527 | 482 | +9.3% | 0.684 | 1.77 | 770.5/sq mi (297.5/km$^2$) |
| Justice | Village | Cook | 12,600 | 12,926 | −2.5% | 2.840 | 7.36 | 4,436.6/sq mi (1,713.0/km$^2$) |
| Kampsville | Village | Calhoun | 310 | 328 | −5.5% | 1.020 | 2.64 | 303.9/sq mi (117.3/km$^2$) |
| Kane | Village | Greene | 296 | 438 | −32.4% | 0.544 | 1.41 | 544.1/sq mi (210.1/km$^2$) |
| Kaneville | Village | Kane | 452 | 484 | −6.6% | 0.285 | 0.74 | 1,586.0/sq mi (612.3/km$^2$) |
| Kangley | Village | LaSalle | 235 | 251 | −6.4% | 0.261 | 0.68 | 900.4/sq mi (347.6/km$^2$) |
| Kankakee† | City | Kankakee | 24,052 | 27,537 | −12.7% | 15.057 | 39.00 | 1,597.4/sq mi (616.8/km$^2$) |
| Kansas | Village | Edgar | 670 | 787 | −14.9% | 1.022 | 2.65 | 655.6/sq mi (253.1/km$^2$) |
| Kappa | Village | Woodford | 229 | 227 | +0.9% | 0.357 | 0.92 | 641.5/sq mi (247.7/km$^2$) |
| Karnak | Village | Pulaski | 430 | 499 | −13.8% | 1.806 | 4.68 | 238.1/sq mi (91.9/km$^2$) |
| Kaskaskia | Village | Randolph | 21 | 14 | +50.0% | 0.106 | 0.27 | 198.1/sq mi (76.5/km$^2$) |
| Keenes | Village | Wayne | 50 | 83 | −39.8% | 0.130 | 0.34 | 384.6/sq mi (148.5/km$^2$) |
| Keensburg | Village | Wabash | 174 | 210 | −17.1% | 0.260 | 0.67 | 669.2/sq mi (258.4/km$^2$) |
| Keithsburg | City | Mercer | 550 | 609 | −9.7% | 2.558 | 6.63 | 215.0/sq mi (83.0/km$^2$) |
| Kell | Village | Marion | 173 | 219 | −21.0% | 1.002 | 2.60 | 172.7/sq mi (66.7/km$^2$) |
| Kempton | Village | Ford | 176 | 231 | −23.8% | 0.165 | 0.43 | 1,066.7/sq mi (411.8/km$^2$) |
| Kenilworth | Village | Cook | 2,514 | 2,513 | 0.0% | 0.607 | 1.57 | 4,141.7/sq mi (1,599.1/km$^2$) |
| Kenney | Village | De Witt | 311 | 326 | −4.6% | 0.282 | 0.73 | 1,102.8/sq mi (425.8/km$^2$) |
| Kewanee | City | Henry | 12,509 | 12,916 | −3.2% | 6.597 | 17.09 | 1,896.2/sq mi (732.1/km$^2$) |
| Keyesport | Village | Clinton Bond | 406 | 421 | −3.6% | 0.720 | 1.86 | 563.9/sq mi (217.7/km$^2$) |
| Kilbourne | Village | Mason | 265 | 302 | −12.3% | 0.889 | 2.30 | 298.1/sq mi (115.1/km$^2$) |
| Kildeer | Village | Lake | 4,091 | 3,968 | +3.1% | 4.230 | 10.96 | 967.1/sq mi (373.4/km$^2$) |
| Kincaid | Village | Christian | 1,349 | 1,505 | −10.4% | 0.817 | 2.12 | 1,651.2/sq mi (637.5/km$^2$) |
| Kinderhook | Village | Pike | 189 | 216 | −12.5% | 0.808 | 2.09 | 233.9/sq mi (90.3/km$^2$) |
| Kingston | Village | DeKalb | 1,108 | 1,164 | −4.8% | 0.984 | 2.55 | 1,126.0/sq mi (434.8/km$^2$) |
| Kingston Mines | Village | Peoria | 266 | 302 | −11.9% | 1.444 | 3.74 | 184.2/sq mi (71.1/km$^2$) |
| Kinmundy | City | Marion | 733 | 796 | −7.9% | 1.198 | 3.10 | 611.9/sq mi (236.2/km$^2$) |
| Kinsman | Village | Grundy | 90 | 99 | −9.1% | 0.068 | 0.18 | 1,323.5/sq mi (511.0/km$^2$) |
| Kirkland | Village | DeKalb | 1,650 | 1,744 | −5.4% | 1.226 | 3.18 | 1,345.8/sq mi (519.6/km$^2$) |
| Kirkwood | Village | Warren | 678 | 714 | −5.0% | 0.939 | 2.43 | 722.0/sq mi (278.8/km$^2$) |
| Knoxville | City | Knox | 2,901 | 2,911 | −0.3% | 2.350 | 6.09 | 1,234.5/sq mi (476.6/km$^2$) |
| Lacon† | City | Marshall | 1,878 | 1,937 | −3.0% | 1.600 | 4.14 | 1,173.8/sq mi (453.2/km$^2$) |
| Ladd | Village | Bureau | 1,263 | 1,295 | −2.5% | 1.209 | 3.13 | 1,044.7/sq mi (403.3/km$^2$) |
| La Fayette | Village | Stark | 160 | 223 | −28.3% | 0.189 | 0.49 | 846.6/sq mi (326.9/km$^2$) |
| La Grange | Village | Cook | 16,321 | 15,550 | +5.0% | 2.525 | 6.54 | 6,463.8/sq mi (2,495.7/km$^2$) |
| La Grange Park | Village | Cook | 13,475 | 13,579 | −0.8% | 2.233 | 5.78 | 6,034.5/sq mi (2,329.9/km$^2$) |
| La Harpe | City | Hancock | 1,175 | 1,235 | −4.9% | 1.364 | 3.53 | 861.4/sq mi (332.6/km$^2$) |
| Lake Barrington | Village | Lake | 5,100 | 4,973 | +2.6% | 5.736 | 14.86 | 889.1/sq mi (343.3/km$^2$) |
| Lake Bluff | Village | Lake | 5,616 | 5,722 | −1.9% | 4.075 | 10.55 | 1,378.2/sq mi (532.1/km$^2$) |
| Lake Forest | City | Lake | 19,367 | 19,375 | 0.0% | 17.200 | 44.55 | 1,126.0/sq mi (434.7/km$^2$) |
| Lake in the Hills | Village | McHenry | 28,982 | 28,965 | +0.1% | 10.203 | 26.43 | 2,840.5/sq mi (1,096.7/km$^2$) |
| Lake Ka-Ho | Village | Macoupin | 194 | 237 | −18.1% | 0.284 | 0.74 | 683.1/sq mi (263.7/km$^2$) |
| Lakemoor | Village | McHenry Lake | 6,182 | 6,017 | +2.7% | 5.263 | 13.63 | 1,174.6/sq mi (453.5/km$^2$) |
| Lake Villa | Village | Lake | 8,741 | 8,741 | 0.0% | 6.515 | 16.87 | 1,341.7/sq mi (518.0/km$^2$) |
| Lakewood | Village | McHenry | 4,283 | 3,811 | +12.4% | 4.587 | 11.88 | 933.7/sq mi (360.5/km$^2$) |
| Lake Zurich | Village | Lake | 19,759 | 19,631 | +0.7% | 6.868 | 17.79 | 2,877.0/sq mi (1,110.8/km$^2$) |
| La Moille | Village | Bureau | 679 | 726 | −6.5% | 1.156 | 2.99 | 587.4/sq mi (226.8/km$^2$) |
| Lanark | City | Carroll | 1,504 | 1,457 | +3.2% | 1.121 | 2.90 | 1,341.7/sq mi (518.0/km$^2$) |
| Lansing | Village | Cook | 29,076 | 28,331 | +2.6% | 7.462 | 19.33 | 3,896.5/sq mi (1,504.5/km$^2$) |
| La Prairie | Village | Adams | 42 | 47 | −10.6% | 0.193 | 0.50 | 217.6/sq mi (84.0/km$^2$) |
| La Rose | Village | Marshall | 98 | 144 | −31.9% | 0.255 | 0.66 | 384.3/sq mi (148.4/km$^2$) |
| LaSalle | City | LaSalle | 9,582 | 9,609 | −0.3% | 13.457 | 34.85 | 712.0/sq mi (274.9/km$^2$) |
| Latham | Village | Logan | 333 | 380 | −12.4% | 0.273 | 0.71 | 1,219.8/sq mi (471.0/km$^2$) |
| Lawrenceville† | City | Lawrence | 4,164 | 4,348 | −4.2% | 2.164 | 5.60 | 1,924.2/sq mi (742.9/km$^2$) |
| Leaf River | Village | Ogle | 432 | 443 | −2.5% | 0.869 | 2.25 | 497.1/sq mi (191.9/km$^2$) |
| Lebanon | City | St. Clair | 4,691 | 4,418 | +6.2% | 2.695 | 6.98 | 1,740.6/sq mi (672.1/km$^2$) |
| Lee | Village | Lee DeKalb | 313 | 337 | −7.1% | 0.198 | 0.51 | 1,580.8/sq mi (610.4/km$^2$) |
| Leland | Village | LaSalle | 951 | 977 | −2.7% | 0.534 | 1.38 | 1,780.9/sq mi (687.6/km$^2$) |
| Leland Grove | City | Sangamon | 1,454 | 1,503 | −3.3% | 0.628 | 1.63 | 2,315.3/sq mi (893.9/km$^2$) |
| Lemont | Village | Cook DuPage | 17,629 | 16,000 | +10.2% | 8.321 | 21.55 | 2,118.6/sq mi (818.0/km$^2$) |
| Lena | Village | Stephenson | 2,772 | 2,912 | −4.8% | 2.651 | 6.87 | 1,045.6/sq mi (403.7/km$^2$) |
| Lenzburg | Village | St. Clair | 468 | 521 | −10.2% | 1.155 | 2.99 | 405.2/sq mi (156.4/km$^2$) |
| Leonore | Village | LaSalle | 121 | 130 | −6.9% | 0.089 | 0.23 | 1,359.6/sq mi (524.9/km$^2$) |
| Lerna | Village | Coles | 226 | 286 | −21.0% | 0.115 | 0.30 | 1,965.2/sq mi (758.8/km$^2$) |
| Le Roy | City | McLean | 3,512 | 3,560 | −1.3% | 2.404 | 6.23 | 1,460.9/sq mi (564.1/km$^2$) |
| Lewistown† | City | Fulton | 2,041 | 2,384 | −14.4% | 2.000 | 5.18 | 1,020.5/sq mi (394.0/km$^2$) |
| Lexington | City | McLean | 2,090 | 2,060 | +1.5% | 2.047 | 5.30 | 1,021.0/sq mi (394.2/km$^2$) |
| Liberty | Village | Adams | 543 | 516 | +5.2% | 0.391 | 1.01 | 1,388.7/sq mi (536.2/km$^2$) |
| Libertyville | Village | Lake | 20,579 | 20,315 | +1.3% | 8.808 | 22.81 | 2,336.4/sq mi (902.1/km$^2$) |
| Lily Lake | Village | Kane | 1,032 | 993 | +3.9% | 2.717 | 7.04 | 379.8/sq mi (146.7/km$^2$) |
| Lima | Village | Adams | 148 | 163 | −9.2% | 0.135 | 0.35 | 1,096.3/sq mi (423.3/km$^2$) |
| Limestone | Village | Kankakee | 1,558 | 1,598 | −2.5% | 2.622 | 6.79 | 594.2/sq mi (229.4/km$^2$) |
| Lincoln† | City | Logan | 13,288 | 14,504 | −8.4% | 6.247 | 16.18 | 2,127.1/sq mi (821.3/km$^2$) |
| Lincolnshire | Village | Lake | 7,940 | 7,275 | +9.1% | 4.559 | 11.81 | 1,741.6/sq mi (672.4/km$^2$) |
| Lincolnwood | Village | Cook | 13,463 | 12,590 | +6.9% | 2.692 | 6.97 | 5,001.1/sq mi (1,930.9/km$^2$) |
| Lindenhurst | Village | Lake | 14,406 | 14,462 | −0.4% | 4.527 | 11.72 | 3,182.2/sq mi (1,228.7/km$^2$) |
| Lisbon | Village | Kendall | 271 | 285 | −4.9% | 2.117 | 5.48 | 128.0/sq mi (49.4/km$^2$) |
| Lisle | Village | DuPage | 24,223 | 22,390 | +8.2% | 6.901 | 17.87 | 3,510.1/sq mi (1,355.2/km$^2$) |
| Litchfield | City | Montgomery | 6,605 | 6,939 | −4.8% | 8.989 | 23.28 | 734.8/sq mi (283.7/km$^2$) |
| Littleton | Village | Schuyler | 139 | 181 | −23.2% | 1.168 | 3.03 | 119.0/sq mi (45.9/km$^2$) |
| Little York | Village | Warren | 283 | 331 | −14.5% | 0.223 | 0.58 | 1,269.1/sq mi (490.0/km$^2$) |
| Liverpool | Village | Fulton | 94 | 129 | −27.1% | 0.084 | 0.22 | 1,119.0/sq mi (432.1/km$^2$) |
| Livingston | Village | Madison | 763 | 858 | −11.1% | 1.040 | 2.69 | 733.7/sq mi (283.3/km$^2$) |
| Loami | Village | Sangamon | 812 | 745 | +9.0% | 1.012 | 2.62 | 802.4/sq mi (309.8/km$^2$) |
| Lockport | City | Will | 26,094 | 24,839 | +5.1% | 11.530 | 29.86 | 2,263.1/sq mi (873.8/km$^2$) |
| Loda | Village | Iroquois | 356 | 407 | −12.5% | 1.467 | 3.80 | 242.7/sq mi (93.7/km$^2$) |
| Lomax | Village | Henderson | 404 | 454 | −11.0% | 1.189 | 3.08 | 339.8/sq mi (131.2/km$^2$) |
| Lombard | Village | DuPage | 44,476 | 43,165 | +3.0% | 10.220 | 26.47 | 4,351.9/sq mi (1,680.3/km$^2$) |
| London Mills | Village | Fulton Knox | 350 | 392 | −10.7% | 0.684 | 1.77 | 511.7/sq mi (197.6/km$^2$) |
| Long Creek | Village | Macon | 1,261 | 1,328 | −5.0% | 2.825 | 7.32 | 446.4/sq mi (172.3/km$^2$) |
| Long Grove | Village | Lake | 8,366 | 8,043 | +4.0% | 12.387 | 32.08 | 675.4/sq mi (260.8/km$^2$) |
| Long Point | Village | Livingston | 204 | 226 | −9.7% | 0.185 | 0.48 | 1,102.7/sq mi (425.8/km$^2$) |
| Longview | Village | Champaign | 112 | 153 | −26.8% | 0.247 | 0.64 | 453.4/sq mi (175.1/km$^2$) |
| Loraine | Village | Adams | 300 | 313 | −4.2% | 0.844 | 2.19 | 355.5/sq mi (137.2/km$^2$) |
| Lostant | Village | LaSalle | 423 | 498 | −15.1% | 1.122 | 2.91 | 377.0/sq mi (145.6/km$^2$) |
| Louisville† | Village | Clay | 1,136 | 1,139 | −0.3% | 0.828 | 2.14 | 1,372.0/sq mi (529.7/km$^2$) |
| Loves Park | City | Winnebago Boone | 23,397 | 23,996 | −2.5% | 16.325 | 42.28 | 1,433.2/sq mi (553.4/km$^2$) |
| Lovington | Village | Moultrie | 1,069 | 1,130 | −5.4% | 0.544 | 1.41 | 1,965.1/sq mi (758.7/km$^2$) |
| Ludlow | Village | Champaign | 308 | 371 | −17.0% | 0.397 | 1.03 | 775.8/sq mi (299.5/km$^2$) |
| Lyndon | Village | Whiteside | 537 | 648 | −17.1% | 0.757 | 1.96 | 709.4/sq mi (273.9/km$^2$) |
| Lynnville | Village | Morgan | 96 | 117 | −17.9% | 0.077 | 0.20 | 1,246.8/sq mi (481.4/km$^2$) |
| Lynwood | Village | Cook | 9,116 | 9,007 | +1.2% | 4.964 | 12.86 | 1,836.4/sq mi (709.0/km$^2$) |
| Lyons | Village | Cook | 10,817 | 10,729 | +0.8% | 2.207 | 5.72 | 4,901.2/sq mi (1,892.4/km$^2$) |
| Macedonia | Village | Franklin Hamilton | 30 | 63 | −52.4% | 0.266 | 0.69 | 112.8/sq mi (43.5/km$^2$) |
| Machesney Park | Village | Winnebago | 22,950 | 23,499 | −2.3% | 12.685 | 32.85 | 1,809.2/sq mi (698.5/km$^2$) |
| Mackinaw | Village | Tazewell | 1,879 | 1,950 | −3.6% | 1.189 | 3.08 | 1,580.3/sq mi (610.2/km$^2$) |
| Macomb† | City | McDonough | 15,051 | 19,288 | −22.0% | 10.570 | 27.38 | 1,423.9/sq mi (549.8/km$^2$) |
| Macon | City | Macon | 1,177 | 1,138 | +3.4% | 1.451 | 3.76 | 811.2/sq mi (313.2/km$^2$) |
| Madison | City | Madison St. Clair | 3,171 | 3,891 | −18.5% | 13.955 | 36.14 | 227.2/sq mi (87.7/km$^2$) |
| Maeystown | Village | Monroe | 150 | 157 | −4.5% | 0.298 | 0.77 | 503.4/sq mi (194.3/km$^2$) |
| Magnolia | Village | Putnam | 256 | 260 | −1.5% | 0.313 | 0.81 | 817.9/sq mi (315.8/km$^2$) |
| Mahomet | Village | Champaign | 9,434 | 7,258 | +30.0% | 9.722 | 25.18 | 970.4/sq mi (374.7/km$^2$) |
| Makanda | Village | Jackson | 547 | 561 | −2.5% | 5.281 | 13.68 | 103.6/sq mi (40.0/km$^2$) |
| Malden | Village | Bureau | 318 | 362 | −12.2% | 0.272 | 0.70 | 1,169.1/sq mi (451.4/km$^2$) |
| Malta | Village | DeKalb | 1,143 | 1,164 | −1.8% | 0.612 | 1.59 | 1,867.6/sq mi (721.1/km$^2$) |
| Manchester | Village | Scott | 265 | 292 | −9.2% | 1.063 | 2.75 | 249.3/sq mi (96.3/km$^2$) |
| Manhattan | Village | Will | 9,385 | 7,051 | +33.1% | 6.681 | 17.30 | 1,404.7/sq mi (542.4/km$^2$) |
| Manito | Village | Mason | 1,552 | 1,642 | −5.5% | 1.513 | 3.92 | 1,025.8/sq mi (396.1/km$^2$) |
| Manlius | Village | Bureau | 298 | 359 | −17.0% | 0.319 | 0.83 | 934.2/sq mi (360.7/km$^2$) |
| Mansfield | Village | Piatt | 928 | 906 | +2.4% | 0.508 | 1.32 | 1,826.8/sq mi (705.3/km$^2$) |
| Manteno | Village | Kankakee | 9,210 | 9,204 | +0.1% | 5.344 | 13.84 | 1,723.4/sq mi (665.4/km$^2$) |
| Maple Park | Village | Kane DeKalb | 1,433 | 1,310 | +9.4% | 2.154 | 5.58 | 665.3/sq mi (256.9/km$^2$) |
| Mapleton | Village | Peoria | 261 | 270 | −3.3% | 0.885 | 2.29 | 294.9/sq mi (113.9/km$^2$) |
| Maquon | Village | Knox | 218 | 284 | −23.2% | 0.162 | 0.42 | 1,345.7/sq mi (519.6/km$^2$) |
| Marengo | City | McHenry | 7,568 | 7,648 | −1.0% | 8.536 | 22.11 | 886.6/sq mi (342.3/km$^2$) |
| Marietta | Village | Fulton | 101 | 112 | −9.8% | 0.273 | 0.71 | 370.0/sq mi (142.8/km$^2$) |
| Marine | Village | Madison | 912 | 960 | −5.0% | 0.746 | 1.93 | 1,222.5/sq mi (472.0/km$^2$) |
| Marion† | City | Williamson | 16,855 | 17,193 | −2.0% | 14.392 | 37.28 | 1,171.1/sq mi (452.2/km$^2$) |
| Marissa | Village | St. Clair | 1,833 | 1,979 | −7.4% | 7.212 | 18.68 | 254.2/sq mi (98.1/km$^2$) |
| Mark | Village | Putnam | 519 | 555 | −6.5% | 1.065 | 2.76 | 487.3/sq mi (188.2/km$^2$) |
| Markham | City | Cook | 11,661 | 12,508 | −6.8% | 5.405 | 14.00 | 2,157.4/sq mi (833.0/km$^2$) |
| Maroa | City | Macon | 1,577 | 1,801 | −12.4% | 1.763 | 4.57 | 894.5/sq mi (345.4/km$^2$) |
| Marquette Heights | City | Tazewell | 2,541 | 2,824 | −10.0% | 0.974 | 2.52 | 2,608.8/sq mi (1,007.3/km$^2$) |
| Marseilles | City | LaSalle | 4,845 | 5,094 | −4.9% | 9.080 | 23.52 | 533.6/sq mi (206.0/km$^2$) |
| Marshall† | City | Clark | 3,947 | 3,933 | +0.4% | 3.666 | 9.49 | 1,076.7/sq mi (415.7/km$^2$) |
| Martinsville | City | Clark | 1,118 | 1,167 | −4.2% | 2.021 | 5.23 | 553.2/sq mi (213.6/km$^2$) |
| Martinton | Village | Iroquois | 334 | 381 | −12.3% | 0.274 | 0.71 | 1,219.0/sq mi (470.7/km$^2$) |
| Maryville | Village | Madison | 8,221 | 7,487 | +9.8% | 5.676 | 14.70 | 1,448.4/sq mi (559.2/km$^2$) |
| Mascoutah | City | St. Clair | 8,754 | 7,483 | +17.0% | 9.578 | 24.81 | 914.0/sq mi (352.9/km$^2$) |
| Mason | Town | Effingham | 323 | 345 | −6.4% | 1.287 | 3.33 | 251.0/sq mi (96.9/km$^2$) |
| Mason City | City | Mason | 2,077 | 2,343 | −11.4% | 1.014 | 2.63 | 2,048.3/sq mi (790.9/km$^2$) |
| Matherville | Village | Mercer | 707 | 723 | −2.2% | 0.391 | 1.01 | 1,808.2/sq mi (698.1/km$^2$) |
| Matteson | Village | Cook | 19,073 | 19,009 | +0.3% | 9.285 | 24.05 | 2,054.2/sq mi (793.1/km$^2$) |
| Mattoon | City | Coles | 16,870 | 18,555 | −9.1% | 10.314 | 26.71 | 1,635.6/sq mi (631.5/km$^2$) |
| Maunie | Village | White | 91 | 139 | −34.5% | 0.159 | 0.41 | 572.3/sq mi (221.0/km$^2$) |
| Maywood | Village | Cook | 23,512 | 24,090 | −2.4% | 2.717 | 7.04 | 8,653.7/sq mi (3,341.2/km$^2$) |
| Mazon | Village | Grundy | 979 | 1,015 | −3.5% | 0.602 | 1.56 | 1,626.2/sq mi (627.9/km$^2$) |
| McClure | Village | Alexander | 256 | 402 | −36.3% | 1.528 | 3.96 | 167.5/sq mi (64.7/km$^2$) |
| McCook | Village | Cook | 249 | 228 | +9.2% | 2.614 | 6.77 | 95.3/sq mi (36.8/km$^2$) |
| McCullom Lake | Village | McHenry | 988 | 1,049 | −5.8% | 0.347 | 0.90 | 2,847.3/sq mi (1,099.3/km$^2$) |
| McHenry | City | McHenry | 27,135 | 26,992 | +0.5% | 14.499 | 37.55 | 1,871.5/sq mi (722.6/km$^2$) |
| McLean | Village | McLean | 743 | 830 | −10.5% | 1.177 | 3.05 | 631.3/sq mi (243.7/km$^2$) |
| McLeansboro† | City | Hamilton | 2,675 | 2,883 | −7.2% | 2.817 | 7.30 | 949.6/sq mi (366.6/km$^2$) |
| McNabb | Village | Putnam | 275 | 285 | −3.5% | 0.177 | 0.46 | 1,553.7/sq mi (599.9/km$^2$) |
| Mechanicsburg | Village | Sangamon | 662 | 590 | +12.2% | 1.036 | 2.68 | 639.0/sq mi (246.7/km$^2$) |
| Media | Village | Henderson | 121 | 107 | +13.1% | 1.698 | 4.40 | 71.3/sq mi (27.5/km$^2$) |
| Medora | Village | Macoupin | 379 | 419 | −9.5% | 0.380 | 0.98 | 997.4/sq mi (385.1/km$^2$) |
| Melrose Park | Village | Cook | 24,796 | 25,411 | −2.4% | 4.353 | 11.27 | 5,696.3/sq mi (2,199.4/km$^2$) |
| Melvin | Village | Ford | 416 | 452 | −8.0% | 0.346 | 0.90 | 1,202.3/sq mi (464.2/km$^2$) |
| Mendon | Village | Adams | 872 | 953 | −8.5% | 0.857 | 2.22 | 1,017.5/sq mi (392.9/km$^2$) |
| Mendota | City | LaSalle | 7,061 | 7,372 | −4.2% | 5.056 | 13.09 | 1,396.6/sq mi (539.2/km$^2$) |
| Menominee | Village | Jo Daviess | 211 | 248 | −14.9% | 1.914 | 4.96 | 110.2/sq mi (42.6/km$^2$) |
| Meredosia | Village | Morgan | 826 | 1,044 | −20.9% | 0.864 | 2.24 | 956.0/sq mi (369.1/km$^2$) |
| Merrionette Park | Village | Cook | 1,969 | 1,900 | +3.6% | 0.375 | 0.97 | 5,250.7/sq mi (2,027.3/km$^2$) |
| Metamora | Village | Woodford | 3,904 | 3,636 | +7.4% | 2.263 | 5.86 | 1,725.1/sq mi (666.1/km$^2$) |
| Metcalf | Village | Edgar | 139 | 189 | −26.5% | 0.594 | 1.54 | 234.0/sq mi (90.4/km$^2$) |
| Metropolis† | City | Massac | 5,969 | 6,537 | −8.7% | 6.020 | 15.59 | 991.5/sq mi (382.8/km$^2$) |
| Mettawa | Village | Lake | 533 | 547 | −2.6% | 5.449 | 14.11 | 97.8/sq mi (37.8/km$^2$) |
| Middletown | Village | Logan | 329 | 324 | +1.5% | 0.341 | 0.88 | 964.8/sq mi (372.5/km$^2$) |
| Midlothian | Village | Cook | 14,325 | 14,819 | −3.3% | 2.819 | 7.30 | 5,081.6/sq mi (1,962.0/km$^2$) |
| Milan | Village | Rock Island | 5,097 | 5,099 | 0.0% | 6.254 | 16.20 | 815.0/sq mi (314.7/km$^2$) |
| Milford | Village | Iroquois | 1,158 | 1,306 | −11.3% | 0.671 | 1.74 | 1,725.8/sq mi (666.3/km$^2$) |
| Millbrook | Village | Kendall | 277 | 335 | −17.3% | 1.846 | 4.78 | 150.1/sq mi (57.9/km$^2$) |
| Mill Creek | Village | Union | 59 | 65 | −9.2% | 0.376 | 0.97 | 156.9/sq mi (60.6/km$^2$) |
| Milledgeville | Village | Carroll | 1,026 | 1,032 | −0.6% | 0.690 | 1.79 | 1,487.0/sq mi (574.1/km$^2$) |
| Millington | Village | Kendall LaSalle | 617 | 665 | −7.2% | 0.708 | 1.83 | 871.5/sq mi (336.5/km$^2$) |
| Mill Shoals | Village | White Wayne | 176 | 215 | −18.1% | 0.767 | 1.99 | 229.5/sq mi (88.6/km$^2$) |
| Millstadt | Village | St. Clair | 4,071 | 4,011 | +1.5% | 3.491 | 9.04 | 1,166.1/sq mi (450.2/km$^2$) |
| Milton | Village | Pike | 214 | 271 | −21.0% | 0.386 | 1.00 | 554.4/sq mi (214.1/km$^2$) |
| Mineral | Village | Bureau | 206 | 237 | −13.1% | 0.553 | 1.43 | 372.5/sq mi (143.8/km$^2$) |
| Minier | Village | Tazewell | 1,154 | 1,252 | −7.8% | 0.569 | 1.47 | 2,028.1/sq mi (783.1/km$^2$) |
| Minonk | City | Woodford | 1,928 | 2,078 | −7.2% | 2.400 | 6.22 | 803.3/sq mi (310.2/km$^2$) |
| Minooka | Village | Grundy Will | 12,758 | 10,924 | +16.8% | 9.405 | 24.36 | 1,356.5/sq mi (523.8/km$^2$) |
| Modesto | Village | Macoupin | 182 | 189 | −3.7% | 0.559 | 1.45 | 325.6/sq mi (125.7/km$^2$) |
| Mokena | Village | Will | 19,887 | 18,740 | +6.1% | 8.689 | 22.50 | 2,288.8/sq mi (883.7/km$^2$) |
| Moline | City | Rock Island | 42,985 | 43,483 | −1.1% | 16.753 | 43.39 | 2,565.8/sq mi (990.7/km$^2$) |
| Momence | City | Kankakee | 3,117 | 3,310 | −5.8% | 1.569 | 4.06 | 1,986.6/sq mi (767.0/km$^2$) |
| Monee | Village | Will | 5,128 | 5,148 | −0.4% | 4.472 | 11.58 | 1,146.7/sq mi (442.7/km$^2$) |
| Monmouth† | City | Warren | 8,902 | 9,444 | −5.7% | 4.242 | 10.99 | 2,098.5/sq mi (810.3/km$^2$) |
| Monroe Center | Village | Ogle | 411 | 471 | −12.7% | 1.212 | 3.14 | 339.1/sq mi (130.9/km$^2$) |
| Montgomery | Village | Kane Kendall | 20,262 | 18,438 | +9.9% | 9.299 | 24.08 | 2,178.9/sq mi (841.3/km$^2$) |
| Monticello† | City | Piatt | 5,941 | 5,548 | +7.1% | 3.852 | 9.98 | 1,542.3/sq mi (595.5/km$^2$) |
| Montrose | Village | Effingham | 210 | 201 | +4.5% | 0.637 | 1.65 | 329.7/sq mi (127.3/km$^2$) |
| Morris† | City | Grundy | 14,163 | 13,636 | +3.9% | 9.909 | 25.66 | 1,429.3/sq mi (551.9/km$^2$) |
| Morrison† | City | Whiteside | 4,085 | 4,188 | −2.5% | 2.518 | 6.52 | 1,622.3/sq mi (626.4/km$^2$) |
| Morrisonville | Village | Christian | 997 | 1,056 | −5.6% | 1.035 | 2.68 | 963.3/sq mi (371.9/km$^2$) |
| Morton | Village | Tazewell | 17,117 | 16,267 | +5.2% | 12.808 | 33.17 | 1,336.4/sq mi (516.0/km$^2$) |
| Morton Grove | Village | Cook | 25,297 | 23,270 | +8.7% | 5.088 | 13.18 | 4,971.9/sq mi (1,919.7/km$^2$) |
| Mound City | City | Pulaski | 526 | 588 | −10.5% | 0.675 | 1.75 | 779.3/sq mi (300.9/km$^2$) |
| Mounds | City | Pulaski | 661 | 810 | −18.4% | 1.207 | 3.13 | 547.6/sq mi (211.4/km$^2$) |
| Mound Station | Village | Brown | 117 | 122 | −4.1% | 0.519 | 1.34 | 225.4/sq mi (87.0/km$^2$) |
| Mount Auburn | Village | Christian | 452 | 480 | −5.8% | 0.997 | 2.58 | 453.4/sq mi (175.0/km$^2$) |
| Mount Carmel† | City | Wabash | 7,015 | 7,284 | −3.7% | 4.809 | 12.46 | 1,458.7/sq mi (563.2/km$^2$) |
| Mount Carroll† | City | Carroll | 1,479 | 1,717 | −13.9% | 2.003 | 5.19 | 738.4/sq mi (285.1/km$^2$) |
| Mount Clare | Village | Macoupin | 311 | 278 | +11.9% | 1.538 | 3.98 | 202.2/sq mi (78.1/km$^2$) |
| Mount Erie | Village | Wayne | 98 | 88 | +11.4% | 0.384 | 0.99 | 255.2/sq mi (98.5/km$^2$) |
| Mount Morris | Village | Ogle | 2,861 | 2,998 | −4.6% | 1.560 | 4.04 | 1,834.0/sq mi (708.1/km$^2$) |
| Mount Olive | City | Macoupin | 2,015 | 2,099 | −4.0% | 1.153 | 2.99 | 1,747.6/sq mi (674.8/km$^2$) |
| Mount Prospect | Village | Cook | 56,852 | 54,167 | +5.0% | 10.719 | 27.76 | 5,303.9/sq mi (2,047.8/km$^2$) |
| Mount Pulaski | City | Logan | 1,537 | 1,566 | −1.9% | 1.134 | 2.94 | 1,355.4/sq mi (523.3/km$^2$) |
| Mount Sterling† | City | Brown | 2,006 | 2,025 | −0.9% | 1.108 | 2.87 | 1,810.5/sq mi (699.0/km$^2$) |
| Mount Vernon† | City | Jefferson | 14,600 | 15,277 | −4.4% | 14.583 | 37.77 | 1,001.2/sq mi (386.6/km$^2$) |
| Mount Zion | Village | Macon | 6,019 | 5,833 | +3.2% | 4.227 | 10.95 | 1,423.9/sq mi (549.8/km$^2$) |
| Moweaqua | Village | Shelby Christian | 1,764 | 1,831 | −3.7% | 2.123 | 5.50 | 830.9/sq mi (320.8/km$^2$) |
| Muddy | Village | Saline | 61 | 68 | −10.3% | 0.303 | 0.78 | 201.3/sq mi (77.7/km$^2$) |
| Mulberry Grove | Village | Bond | 520 | 634 | −18.0% | 1.003 | 2.60 | 518.4/sq mi (200.2/km$^2$) |
| Muncie | Village | Vermilion | 157 | 146 | +7.5% | 0.179 | 0.46 | 877.1/sq mi (338.6/km$^2$) |
| Mundelein | Village | Lake | 31,560 | 31,064 | +1.6% | 9.585 | 24.83 | 3,292.6/sq mi (1,271.3/km$^2$) |
| Murphysboro† | City | Jackson | 7,093 | 7,970 | −11.0% | 5.248 | 13.59 | 1,351.6/sq mi (521.8/km$^2$) |
| Murrayville | Village | Morgan | 567 | 587 | −3.4% | 0.496 | 1.28 | 1,143.1/sq mi (441.4/km$^2$) |
| Naperville | City | DuPage Will | 149,540 | 141,853 | +5.4% | 39.077 | 101.21 | 3,826.8/sq mi (1,477.5/km$^2$) |
| Naplate | Village | LaSalle | 412 | 496 | −16.9% | 0.160 | 0.41 | 2,575.0/sq mi (994.2/km$^2$) |
| Naples | Town | Scott | 100 | 130 | −23.1% | 0.605 | 1.57 | 165.3/sq mi (63.8/km$^2$) |
| Nashville† | City | Washington | 3,105 | 3,258 | −4.7% | 3.079 | 7.97 | 1,008.4/sq mi (389.4/km$^2$) |
| Nason | City | Jefferson | 199 | 236 | −15.7% | 0.911 | 2.36 | 218.4/sq mi (84.3/km$^2$) |
| Nauvoo | City | Hancock | 950 | 1,149 | −17.3% | 3.386 | 8.77 | 280.6/sq mi (108.3/km$^2$) |
| Nebo | Village | Pike | 282 | 340 | −17.1% | 0.434 | 1.12 | 649.8/sq mi (250.9/km$^2$) |
| Nelson | Village | Lee | 127 | 170 | −25.3% | 0.216 | 0.56 | 588.0/sq mi (227.0/km$^2$) |
| Neoga | City | Cumberland | 1,398 | 1,636 | −14.5% | 1.390 | 3.60 | 1,005.8/sq mi (388.3/km$^2$) |
| Neponset | Village | Bureau | 427 | 473 | −9.7% | 1.016 | 2.63 | 420.3/sq mi (162.3/km$^2$) |
| Newark | Village | Kendall | 973 | 992 | −1.9% | 1.124 | 2.91 | 865.7/sq mi (334.2/km$^2$) |
| New Athens | Village | St. Clair | 1,955 | 2,054 | −4.8% | 2.112 | 5.47 | 925.7/sq mi (357.4/km$^2$) |
| New Baden | Village | Clinton St. Clair | 3,428 | 3,349 | +2.4% | 1.825 | 4.73 | 1,878.4/sq mi (725.2/km$^2$) |
| New Bedford | Village | Bureau | 76 | 75 | +1.3% | 0.155 | 0.40 | 490.3/sq mi (189.3/km$^2$) |
| New Berlin | Village | Sangamon | 1,381 | 1,346 | +2.6% | 1.130 | 2.93 | 1,222.1/sq mi (471.9/km$^2$) |
| New Boston | City | Mercer | 613 | 683 | −10.2% | 0.941 | 2.44 | 651.4/sq mi (251.5/km$^2$) |
| New Burnside | Village | Johnson | 153 | 211 | −27.5% | 1.045 | 2.71 | 146.4/sq mi (56.5/km$^2$) |
| New Canton | Town | Pike | 334 | 359 | −7.0% | 0.881 | 2.28 | 379.1/sq mi (146.4/km$^2$) |
| New Douglas | Village | Madison | 350 | 319 | +9.7% | 1.048 | 2.71 | 334.0/sq mi (128.9/km$^2$) |
| New Grand Chain | Village | Pulaski | 150 | 210 | −28.6% | 1.043 | 2.70 | 143.8/sq mi (55.5/km$^2$) |
| New Haven | Village | Gallatin | 399 | 433 | −7.9% | 1.244 | 3.22 | 320.7/sq mi (123.8/km$^2$) |
| New Holland | Village | Logan | 275 | 269 | +2.2% | 0.310 | 0.80 | 887.1/sq mi (342.5/km$^2$) |
| New Lenox | Village | Will | 27,214 | 24,394 | +11.6% | 15.722 | 40.72 | 1,731.0/sq mi (668.3/km$^2$) |
| Newman | City | Douglas | 778 | 865 | −10.1% | 0.613 | 1.59 | 1,269.2/sq mi (490.0/km$^2$) |
| New Milford | Village | Winnebago | 794 | 697 | +13.9% | 2.543 | 6.59 | 312.2/sq mi (120.6/km$^2$) |
| New Minden | Village | Washington | 175 | 215 | −18.6% | 0.277 | 0.72 | 631.8/sq mi (243.9/km$^2$) |
| New Salem | Village | Pike | 121 | 137 | −11.7% | 1.049 | 2.72 | 115.3/sq mi (44.5/km$^2$) |
| Newton† | City | Jasper | 2,777 | 2,849 | −2.5% | 2.088 | 5.41 | 1,330.0/sq mi (513.5/km$^2$) |
| Niantic | Village | Macon | 612 | 707 | −13.4% | 1.039 | 2.69 | 589.0/sq mi (227.4/km$^2$) |
| Niles | Village | Cook | 30,912 | 29,803 | +3.7% | 5.848 | 15.15 | 5,285.9/sq mi (2,040.9/km$^2$) |
| Nilwood | Town | Macoupin | 201 | 239 | −15.9% | 0.465 | 1.20 | 432.3/sq mi (166.9/km$^2$) |
| Noble | Village | Richland | 633 | 677 | −6.5% | 1.017 | 2.63 | 622.4/sq mi (240.3/km$^2$) |
| Nokomis | City | Montgomery | 2,142 | 2,256 | −5.1% | 1.261 | 3.27 | 1,698.7/sq mi (655.9/km$^2$) |
| Nora | Village | Jo Daviess | 107 | 121 | −11.6% | 0.830 | 2.15 | 128.9/sq mi (49.8/km$^2$) |
| Normal | Town | McLean | 52,736 | 52,497 | +0.5% | 18.296 | 47.39 | 2,882.4/sq mi (1,112.9/km$^2$) |
| Norridge | Village | Cook | 15,251 | 14,572 | +4.7% | 1.808 | 4.68 | 8,435.3/sq mi (3,256.9/km$^2$) |
| Norris | Village | Fulton | 173 | 213 | −18.8% | 0.283 | 0.73 | 611.3/sq mi (236.0/km$^2$) |
| Norris City | Village | White | 1,145 | 1,275 | −10.2% | 1.172 | 3.04 | 977.0/sq mi (377.2/km$^2$) |
| North Aurora | Village | Kane | 18,261 | 16,760 | +9.0% | 7.557 | 19.57 | 2,416.4/sq mi (933.0/km$^2$) |
| North Barrington | Village | Lake | 3,171 | 3,047 | +4.1% | 4.712 | 12.20 | 673.0/sq mi (259.8/km$^2$) |
| Northbrook | Village | Cook | 35,222 | 33,170 | +6.2% | 13.240 | 34.29 | 2,660.3/sq mi (1,027.1/km$^2$) |
| North Chicago | City | Lake | 30,759 | 32,574 | −5.6% | 7.993 | 20.70 | 3,848.2/sq mi (1,485.8/km$^2$) |
| North City | Village | Franklin | 509 | 608 | −16.3% | 2.171 | 5.62 | 234.5/sq mi (90.5/km$^2$) |
| Northfield | Village | Cook | 5,751 | 5,420 | +6.1% | 3.230 | 8.37 | 1,780.5/sq mi (687.5/km$^2$) |
| North Henderson | Village | Mercer | 162 | 187 | −13.4% | 0.226 | 0.59 | 716.8/sq mi (276.8/km$^2$) |
| Northlake | City | Cook | 12,840 | 12,323 | +4.2% | 3.176 | 8.23 | 4,042.8/sq mi (1,560.9/km$^2$) |
| North Pekin | Village | Tazewell | 1,478 | 1,573 | −6.0% | 1.392 | 3.61 | 1,061.8/sq mi (410.0/km$^2$) |
| North Riverside | Village | Cook | 7,426 | 6,672 | +11.3% | 1.644 | 4.26 | 4,517.0/sq mi (1,744.0/km$^2$) |
| North Utica | Village | LaSalle | 1,323 | 1,352 | −2.1% | 3.455 | 8.95 | 382.9/sq mi (147.8/km$^2$) |
| Norwood | Village | Peoria | 437 | 478 | −8.6% | 0.307 | 0.80 | 1,423.5/sq mi (549.6/km$^2$) |
| Oak Brook | Village | DuPage | 8,163 | 7,883 | +3.6% | 7.959 | 20.61 | 1,025.6/sq mi (396.0/km$^2$) |
| Oakbrook Terrace | City | DuPage | 2,751 | 2,134 | +28.9% | 1.306 | 3.38 | 2,106.4/sq mi (813.3/km$^2$) |
| Oakdale | Village | Washington | 199 | 221 | −10.0% | 1.582 | 4.10 | 125.8/sq mi (48.6/km$^2$) |
| Oakford | Village | Menard | 234 | 286 | −18.2% | 0.249 | 0.64 | 939.8/sq mi (362.8/km$^2$) |
| Oak Forest | City | Cook | 27,478 | 27,962 | −1.7% | 6.021 | 15.59 | 4,563.7/sq mi (1,762.1/km$^2$) |
| Oak Grove | Village | Rock Island | 476 | 396 | +20.2% | 0.658 | 1.70 | 723.4/sq mi (279.3/km$^2$) |
| Oakland | City | Coles | 739 | 880 | −16.0% | 0.783 | 2.03 | 943.8/sq mi (364.4/km$^2$) |
| Oak Lawn | Village | Cook | 58,362 | 56,690 | +2.9% | 8.571 | 22.20 | 6,809.2/sq mi (2,629.1/km$^2$) |
| Oak Park | Village | Cook | 54,583 | 51,878 | +5.2% | 4.700 | 12.17 | 11,613.4/sq mi (4,484.0/km$^2$) |
| Oakwood | Village | Vermilion | 1,325 | 1,595 | −16.9% | 0.928 | 2.40 | 1,427.8/sq mi (551.3/km$^2$) |
| Oakwood Hills | Village | McHenry | 2,076 | 2,083 | −0.3% | 1.088 | 2.82 | 1,908.1/sq mi (736.7/km$^2$) |
| Oblong | Village | Crawford | 1,371 | 1,466 | −6.5% | 1.086 | 2.81 | 1,262.4/sq mi (487.4/km$^2$) |
| Oconee | Village | Shelby | 141 | 180 | −21.7% | 0.356 | 0.92 | 396.1/sq mi (152.9/km$^2$) |
| Odell | Village | Livingston | 1,003 | 1,046 | −4.1% | 1.077 | 2.79 | 931.3/sq mi (359.6/km$^2$) |
| Odin | Village | Marion | 935 | 1,076 | −13.1% | 1.003 | 2.60 | 932.2/sq mi (359.9/km$^2$) |
| O'Fallon | City | St. Clair | 32,289 | 28,281 | +14.2% | 15.559 | 40.30 | 2,075.3/sq mi (801.3/km$^2$) |
| Ogden | Village | Champaign | 729 | 810 | −10.0% | 0.588 | 1.52 | 1,239.8/sq mi (478.7/km$^2$) |
| Oglesby | City | LaSalle | 3,712 | 3,791 | −2.1% | 4.992 | 12.93 | 743.6/sq mi (287.1/km$^2$) |
| Ohio | Village | Bureau | 465 | 513 | −9.4% | 0.753 | 1.95 | 617.5/sq mi (238.4/km$^2$) |
| Ohlman | Village | Montgomery | 109 | 135 | −19.3% | 0.322 | 0.83 | 338.5/sq mi (130.7/km$^2$) |
| Okawville | Village | Washington | 1,369 | 1,434 | −4.5% | 2.025 | 5.24 | 676.0/sq mi (261.0/km$^2$) |
| Old Mill Creek | Village | Lake | 162 | 178 | −9.0% | 10.671 | 27.64 | 15.2/sq mi (5.9/km$^2$) |
| Old Ripley | Village | Bond | 82 | 108 | −24.1% | 0.154 | 0.40 | 532.5/sq mi (205.6/km$^2$) |
| Old Shawneetown | Village | Gallatin | 113 | 193 | −41.5% | 0.510 | 1.32 | 221.6/sq mi (85.5/km$^2$) |
| Olmsted | Village | Pulaski | 285 | 333 | −14.4% | 3.365 | 8.72 | 84.7/sq mi (32.7/km$^2$) |
| Olney† | City | Richland | 8,701 | 9,115 | −4.5% | 6.931 | 17.95 | 1,255.4/sq mi (484.7/km$^2$) |
| Olympia Fields | Village | Cook | 4,718 | 4,988 | −5.4% | 2.939 | 7.61 | 1,605.3/sq mi (619.8/km$^2$) |
| Omaha | Village | Gallatin | 209 | 266 | −21.4% | 0.744 | 1.93 | 280.9/sq mi (108.5/km$^2$) |
| Onarga | Village | Iroquois | 1,333 | 1,368 | −2.6% | 1.674 | 4.34 | 796.3/sq mi (307.5/km$^2$) |
| Oneida | City | Knox | 696 | 700 | −0.6% | 0.763 | 1.98 | 912.2/sq mi (352.2/km$^2$) |
| Oquawka† | Village | Henderson | 1,134 | 1,371 | −17.3% | 1.469 | 3.80 | 772.0/sq mi (298.1/km$^2$) |
| Orangeville | Village | Stephenson | 766 | 793 | −3.4% | 0.676 | 1.75 | 1,133.1/sq mi (437.5/km$^2$) |
| Oreana | Village | Macon | 891 | 875 | +1.8% | 0.468 | 1.21 | 1,903.8/sq mi (735.1/km$^2$) |
| Oregon† | City | Ogle | 3,604 | 3,721 | −3.1% | 1.927 | 4.99 | 1,870.3/sq mi (722.1/km$^2$) |
| Orient | City | Franklin | 327 | 358 | −8.7% | 0.745 | 1.93 | 438.9/sq mi (169.5/km$^2$) |
| Orion | Village | Henry | 1,754 | 1,861 | −5.7% | 0.944 | 2.44 | 1,858.1/sq mi (717.4/km$^2$) |
| Orland Hills | Village | Cook | 6,893 | 7,149 | −3.6% | 1.145 | 2.97 | 6,020.1/sq mi (2,324.4/km$^2$) |
| Orland Park | Village | Cook Will | 58,703 | 56,767 | +3.4% | 22.028 | 57.05 | 2,664.9/sq mi (1,028.9/km$^2$) |
| Oswego | Village | Kendall | 34,585 | 30,355 | +13.9% | 14.888 | 38.56 | 2,323.0/sq mi (896.9/km$^2$) |
| Ottawa† | City | LaSalle | 18,840 | 18,768 | +0.4% | 14.657 | 37.96 | 1,285.4/sq mi (496.3/km$^2$) |
| Otterville | Town | Jersey | 87 | 126 | −31.0% | 1.006 | 2.61 | 86.5/sq mi (33.4/km$^2$) |
| Owaneco | Village | Christian | 209 | 239 | −12.6% | 0.458 | 1.19 | 456.3/sq mi (176.2/km$^2$) |
| Palatine | Village | Cook | 67,908 | 68,557 | −0.9% | 13.598 | 35.22 | 4,994.0/sq mi (1,928.2/km$^2$) |
| Palestine | Village | Crawford | 1,233 | 1,369 | −9.9% | 0.789 | 2.04 | 1,562.7/sq mi (603.4/km$^2$) |
| Palmer | Village | Christian | 216 | 229 | −5.7% | 0.995 | 2.58 | 217.1/sq mi (83.8/km$^2$) |
| Palmyra | Village | Macoupin | 605 | 698 | −13.3% | 0.999 | 2.59 | 605.6/sq mi (233.8/km$^2$) |
| Palos Heights | City | Cook | 12,068 | 12,515 | −3.6% | 3.774 | 9.77 | 3,197.7/sq mi (1,234.6/km$^2$) |
| Palos Hills | City | Cook | 18,530 | 17,484 | +6.0% | 4.246 | 11.00 | 4,364.1/sq mi (1,685.0/km$^2$) |
| Palos Park | Village | Cook | 4,899 | 4,847 | +1.1% | 6.445 | 16.69 | 760.1/sq mi (293.5/km$^2$) |
| Pana | City | Christian Shelby | 5,199 | 5,847 | −11.1% | 3.855 | 9.98 | 1,348.6/sq mi (520.7/km$^2$) |
| Panama | Village | Bond Montgomery | 337 | 343 | −1.7% | 0.365 | 0.95 | 923.3/sq mi (356.5/km$^2$) |
| Panola | Village | Woodford | 47 | 45 | +4.4% | 0.429 | 1.11 | 109.6/sq mi (42.3/km$^2$) |
| Papineau | Village | Iroquois | 133 | 171 | −22.2% | 0.208 | 0.54 | 639.4/sq mi (246.9/km$^2$) |
| Paris† | City | Edgar | 8,291 | 8,837 | −6.2% | 5.676 | 14.70 | 1,460.7/sq mi (564.0/km$^2$) |
| Park City | City | Lake | 7,885 | 7,570 | +4.2% | 1.157 | 3.00 | 6,815.0/sq mi (2,631.3/km$^2$) |
| Parkersburg | Village | Richland | 186 | 199 | −6.5% | 0.826 | 2.14 | 225.2/sq mi (86.9/km$^2$) |
| Park Forest | Village | Cook Will | 21,687 | 21,975 | −1.3% | 4.961 | 12.85 | 4,371.5/sq mi (1,687.8/km$^2$) |
| Park Ridge | City | Cook | 39,656 | 37,480 | +5.8% | 7.088 | 18.36 | 5,594.8/sq mi (2,160.2/km$^2$) |
| Patoka | Village | Marion | 525 | 584 | −10.1% | 1.115 | 2.89 | 470.9/sq mi (181.8/km$^2$) |
| Pawnee | Village | Sangamon | 2,678 | 2,739 | −2.2% | 1.332 | 3.45 | 2,010.5/sq mi (776.3/km$^2$) |
| Paw Paw | Village | Lee | 830 | 870 | −4.6% | 0.572 | 1.48 | 1,451.0/sq mi (560.3/km$^2$) |
| Paxton† | City | Ford | 4,450 | 4,473 | −0.5% | 3.036 | 7.86 | 1,465.7/sq mi (565.9/km$^2$) |
| Payson | Village | Adams | 1,025 | 1,026 | −0.1% | 1.170 | 3.03 | 876.1/sq mi (338.3/km$^2$) |
| Pearl | Village | Pike | 103 | 138 | −25.4% | 1.505 | 3.90 | 68.4/sq mi (26.4/km$^2$) |
| Pearl City | Village | Stephenson | 790 | 838 | −5.7% | 0.641 | 1.66 | 1,232.4/sq mi (475.9/km$^2$) |
| Pecatonica | Village | Winnebago | 2,090 | 2,195 | −4.8% | 1.283 | 3.32 | 1,629.0/sq mi (629.0/km$^2$) |
| Pekin† | City | Tazewell | 31,731 | 34,094 | −6.9% | 15.716 | 40.70 | 2,019.0/sq mi (779.5/km$^2$) |
| Peoria† | City | Peoria | 113,150 | 115,007 | −1.6% | 47.965 | 124.23 | 2,359.0/sq mi (910.8/km$^2$) |
| Peoria Heights | Village | Peoria Woodford | 5,908 | 6,156 | −4.0% | 2.492 | 6.45 | 2,370.8/sq mi (915.4/km$^2$) |
| Peotone | Village | Will | 4,150 | 4,142 | +0.2% | 2.001 | 5.18 | 2,074.0/sq mi (800.8/km$^2$) |
| Percy | Village | Randolph | 906 | 970 | −6.6% | 0.979 | 2.54 | 925.4/sq mi (357.3/km$^2$) |
| Perry | Village | Pike | 314 | 397 | −20.9% | 0.386 | 1.00 | 813.5/sq mi (314.1/km$^2$) |
| Peru | City | LaSalle | 9,896 | 10,295 | −3.9% | 9.987 | 25.87 | 990.9/sq mi (382.6/km$^2$) |
| Pesotum | Village | Champaign | 550 | 551 | −0.2% | 0.569 | 1.47 | 966.6/sq mi (373.2/km$^2$) |
| Petersburg† | City | Menard | 2,258 | 2,260 | −0.1% | 1.562 | 4.05 | 1,445.6/sq mi (558.1/km$^2$) |
| Phillipstown | Village | White | 34 | 44 | −22.7% | 0.270 | 0.70 | 125.9/sq mi (48.6/km$^2$) |
| Philo | Village | Champaign | 1,392 | 1,466 | −5.0% | 0.829 | 2.15 | 1,679.1/sq mi (648.3/km$^2$) |
| Phoenix | Village | Cook | 1,708 | 1,964 | −13.0% | 0.464 | 1.20 | 3,681.0/sq mi (1,421.3/km$^2$) |
| Pierron | Village | Bond Madison | 459 | 600 | −23.5% | 0.734 | 1.90 | 625.3/sq mi (241.4/km$^2$) |
| Pinckneyville† | City | Perry | 5,066 | 5,648 | −10.3% | 4.106 | 10.63 | 1,233.8/sq mi (476.4/km$^2$) |
| Pingree Grove | Village | Kane | 10,365 | 4,532 | +128.7% | 3.637 | 9.42 | 2,849.9/sq mi (1,100.3/km$^2$) |
| Piper City | Village | Ford | 745 | 826 | −9.8% | 0.555 | 1.44 | 1,342.3/sq mi (518.3/km$^2$) |
| Pittsburg | Village | Williamson | 565 | 572 | −1.2% | 2.065 | 5.35 | 273.6/sq mi (105.6/km$^2$) |
| Pittsfield† | City | Pike | 4,206 | 4,576 | −8.1% | 4.782 | 12.39 | 879.5/sq mi (339.6/km$^2$) |
| Plainfield | Village | Will | 44,762 | 39,581 | +13.1% | 24.722 | 64.03 | 1,810.6/sq mi (699.1/km$^2$) |
| Plainville | Village | Adams | 271 | 264 | +2.7% | 0.235 | 0.61 | 1,153.2/sq mi (445.2/km$^2$) |
| Plano | City | Kendall | 11,847 | 10,856 | +9.1% | 8.979 | 23.26 | 1,319.4/sq mi (509.4/km$^2$) |
| Plattville | Village | Kendall | 220 | 242 | −9.1% | 2.259 | 5.85 | 97.4/sq mi (37.6/km$^2$) |
| Pleasant Hill | Village | Pike | 924 | 966 | −4.3% | 0.765 | 1.98 | 1,207.8/sq mi (466.4/km$^2$) |
| Pleasant Plains | Village | Sangamon | 808 | 802 | +0.7% | 1.335 | 3.46 | 605.2/sq mi (233.7/km$^2$) |
| Plymouth | Village | Hancock | 436 | 505 | −13.7% | 0.565 | 1.46 | 771.7/sq mi (297.9/km$^2$) |
| Pocahontas | Village | Bond | 697 | 784 | −11.1% | 0.783 | 2.03 | 890.2/sq mi (343.7/km$^2$) |
| Polo | City | Ogle | 2,291 | 2,355 | −2.7% | 1.334 | 3.46 | 1,717.4/sq mi (663.1/km$^2$) |
| Pontiac† | City | Livingston | 11,150 | 11,931 | −6.5% | 8.382 | 21.71 | 1,330.2/sq mi (513.6/km$^2$) |
| Pontoon Beach | Village | Madison | 5,876 | 5,836 | +0.7% | 9.960 | 25.80 | 590.0/sq mi (227.8/km$^2$) |
| Pontoosuc | Village | Hancock | 99 | 146 | −32.2% | 1.406 | 3.64 | 70.4/sq mi (27.2/km$^2$) |
| Poplar Grove | Village | Boone | 5,049 | 5,023 | +0.5% | 7.663 | 19.85 | 658.9/sq mi (254.4/km$^2$) |
| Port Barrington | Village | McHenry Lake | 1,584 | 1,517 | +4.4% | 1.160 | 3.00 | 1,365.5/sq mi (527.2/km$^2$) |
| Port Byron | Village | Rock Island | 1,668 | 1,647 | +1.3% | 2.428 | 6.29 | 687.0/sq mi (265.2/km$^2$) |
| Posen | Village | Cook | 5,632 | 5,987 | −5.9% | 1.169 | 3.03 | 4,817.8/sq mi (1,860.2/km$^2$) |
| Potomac | Village | Vermilion | 689 | 750 | −8.1% | 0.488 | 1.26 | 1,411.9/sq mi (545.1/km$^2$) |
| Prairie City | Village | McDonough | 407 | 379 | +7.4% | 1.008 | 2.61 | 403.8/sq mi (155.9/km$^2$) |
| Prairie du Rocher | Village | Randolph | 502 | 604 | −16.9% | 0.571 | 1.48 | 879.2/sq mi (339.4/km$^2$) |
| Prairie Grove | Village | McHenry | 1,963 | 1,904 | +3.1% | 5.677 | 14.70 | 345.8/sq mi (133.5/km$^2$) |
| Princeton† | City | Bureau | 7,832 | 7,660 | +2.2% | 8.240 | 21.34 | 950.5/sq mi (367.0/km$^2$) |
| Princeville | Village | Peoria | 1,636 | 1,738 | −5.9% | 1.695 | 4.39 | 965.2/sq mi (372.7/km$^2$) |
| Prophetstown | City | Whiteside | 1,946 | 2,080 | −6.4% | 1.339 | 3.47 | 1,453.3/sq mi (561.1/km$^2$) |
| Prospect Heights | City | Cook | 16,058 | 16,256 | −1.2% | 4.256 | 11.02 | 3,773.0/sq mi (1,456.8/km$^2$) |
| Pulaski | Village | Pulaski | 154 | 206 | −25.2% | 1.310 | 3.39 | 117.6/sq mi (45.4/km$^2$) |
| Quincy† | City | Adams | 39,463 | 40,633 | −2.9% | 15.765 | 40.83 | 2,503.2/sq mi (966.5/km$^2$) |
| Radom | Village | Washington | 183 | 220 | −16.8% | 1.048 | 2.71 | 174.6/sq mi (67.4/km$^2$) |
| Raleigh | Village | Saline | 284 | 350 | −18.9% | 1.976 | 5.12 | 143.7/sq mi (55.5/km$^2$) |
| Ramsey | Village | Fayette | 911 | 1,037 | −12.2% | 1.111 | 2.88 | 820.0/sq mi (316.6/km$^2$) |
| Rankin | Village | Vermilion | 495 | 561 | −11.8% | 0.579 | 1.50 | 854.9/sq mi (330.1/km$^2$) |
| Ransom | Village | LaSalle | 308 | 384 | −19.8% | 0.999 | 2.59 | 308.3/sq mi (119.0/km$^2$) |
| Rantoul | Village | Champaign | 12,371 | 12,941 | −4.4% | 8.490 | 21.99 | 1,457.1/sq mi (562.6/km$^2$) |
| Rapids City | Village | Rock Island | 964 | 959 | +0.5% | 1.626 | 4.21 | 592.9/sq mi (228.9/km$^2$) |
| Raritan | Village | Henderson | 102 | 138 | −26.1% | 0.095 | 0.25 | 1,073.7/sq mi (414.6/km$^2$) |
| Raymond | Village | Montgomery | 949 | 1,006 | −5.7% | 1.258 | 3.26 | 754.4/sq mi (291.3/km$^2$) |
| Red Bud | City | Randolph | 3,804 | 3,698 | +2.9% | 2.623 | 6.79 | 1,450.2/sq mi (559.9/km$^2$) |
| Reddick | Village | Livingston | 199 | 163 | +22.1% | 0.239 | 0.62 | 832.6/sq mi (321.5/km$^2$) |
| Redmon | Village | Edgar | 137 | 173 | −20.8% | 0.145 | 0.38 | 944.8/sq mi (364.8/km$^2$) |
| Reynolds | Village | Rock Island Mercer | 498 | 539 | −7.6% | 0.368 | 0.95 | 1,353.3/sq mi (522.5/km$^2$) |
| Richmond | Village | McHenry | 2,089 | 1,874 | +11.5% | 4.290 | 11.11 | 486.9/sq mi (188.0/km$^2$) |
| Richton Park | Village | Cook | 12,775 | 13,646 | −6.4% | 4.392 | 11.38 | 2,908.7/sq mi (1,123.1/km$^2$) |
| Richview | Village | Washington | 238 | 253 | −5.9% | 1.149 | 2.98 | 207.1/sq mi (80.0/km$^2$) |
| Ridge Farm | Village | Vermilion | 787 | 882 | −10.8% | 3.056 | 7.92 | 257.5/sq mi (99.4/km$^2$) |
| Ridgway | Village | Gallatin | 851 | 869 | −2.1% | 0.880 | 2.28 | 967.0/sq mi (373.4/km$^2$) |
| Ridott | Village | Stephenson | 124 | 164 | −24.4% | 0.074 | 0.19 | 1,675.7/sq mi (647.0/km$^2$) |
| Ringwood | Village | McHenry | 844 | 836 | +1.0% | 3.864 | 10.01 | 218.4/sq mi (84.3/km$^2$) |
| Rio | Village | Knox | 209 | 220 | −5.0% | 0.312 | 0.81 | 669.9/sq mi (258.6/km$^2$) |
| Ripley | Village | Brown | 53 | 86 | −38.4% | 0.379 | 0.98 | 139.8/sq mi (54.0/km$^2$) |
| Riverdale | Village | Cook | 10,663 | 13,549 | −21.3% | 3.575 | 9.26 | 2,982.7/sq mi (1,151.6/km$^2$) |
| River Forest | Village | Cook | 11,717 | 11,172 | +4.9% | 2.480 | 6.42 | 4,724.6/sq mi (1,824.2/km$^2$) |
| River Grove | Village | Cook | 10,612 | 10,227 | +3.8% | 2.391 | 6.19 | 4,438.3/sq mi (1,713.6/km$^2$) |
| Riverside | Village | Cook | 9,298 | 8,875 | +4.8% | 1.978 | 5.12 | 4,700.7/sq mi (1,815.0/km$^2$) |
| Riverton | Village | Sangamon | 3,532 | 3,455 | +2.2% | 3.121 | 8.08 | 1,131.7/sq mi (436.9/km$^2$) |
| Riverwoods | Village | Lake | 3,790 | 3,660 | +3.6% | 3.967 | 10.27 | 955.4/sq mi (368.9/km$^2$) |
| Roanoke | Village | Woodford | 1,960 | 2,065 | −5.1% | 0.939 | 2.43 | 2,087.3/sq mi (805.9/km$^2$) |
| Robbins | Village | Cook | 4,629 | 5,337 | −13.3% | 1.449 | 3.75 | 3,194.6/sq mi (1,233.4/km$^2$) |
| Roberts | Village | Ford | 345 | 362 | −4.7% | 0.481 | 1.25 | 717.3/sq mi (276.9/km$^2$) |
| Robinson† | City | Crawford | 7,150 | 7,713 | −7.3% | 4.699 | 12.17 | 1,521.6/sq mi (587.5/km$^2$) |
| Rochelle | City | Ogle | 9,446 | 9,574 | −1.3% | 13.296 | 34.44 | 710.4/sq mi (274.3/km$^2$) |
| Rochester | Village | Sangamon | 3,863 | 3,689 | +4.7% | 2.646 | 6.85 | 1,459.9/sq mi (563.7/km$^2$) |
| Rockbridge | Village | Greene | 175 | 169 | +3.6% | 0.737 | 1.91 | 237.4/sq mi (91.7/km$^2$) |
| Rock City | Village | Stephenson | 293 | 315 | −7.0% | 0.134 | 0.35 | 2,186.6/sq mi (844.2/km$^2$) |
| Rockdale | Village | Will | 2,012 | 1,976 | +1.8% | 1.411 | 3.65 | 1,425.9/sq mi (550.6/km$^2$) |
| Rock Falls | City | Whiteside | 8,789 | 9,266 | −5.1% | 3.983 | 10.32 | 2,206.6/sq mi (852.0/km$^2$) |
| Rockford† | City | Winnebago | 148,655 | 152,871 | −2.8% | 64.544 | 167.17 | 2,303.2/sq mi (889.3/km$^2$) |
| Rock Island† | City | Rock Island | 37,108 | 39,018 | −4.9% | 16.872 | 43.70 | 2,199.4/sq mi (849.2/km$^2$) |
| Rockton | Village | Winnebago | 7,863 | 7,685 | +2.3% | 6.862 | 17.77 | 1,145.9/sq mi (442.4/km$^2$) |
| Rockwood | Village | Randolph | 32 | 42 | −23.8% | 0.212 | 0.55 | 150.9/sq mi (58.3/km$^2$) |
| Rolling Meadows | City | Cook | 24,200 | 24,099 | +0.4% | 5.616 | 14.55 | 4,309.1/sq mi (1,663.8/km$^2$) |
| Romeoville | Village | Will | 39,863 | 39,680 | +0.5% | 19.074 | 49.40 | 2,089.9/sq mi (806.9/km$^2$) |
| Roodhouse | City | Greene | 1,578 | 1,814 | −13.0% | 1.127 | 2.92 | 1,400.2/sq mi (540.6/km$^2$) |
| Roscoe | Village | Winnebago | 10,983 | 10,785 | +1.8% | 10.265 | 26.59 | 1,069.9/sq mi (413.1/km$^2$) |
| Rose Hill | Village | Jasper | 89 | 80 | +11.3% | 0.634 | 1.64 | 140.4/sq mi (54.2/km$^2$) |
| Roselle | Village | DuPage Cook | 22,897 | 22,763 | +0.6% | 5.537 | 14.34 | 4,135.3/sq mi (1,596.6/km$^2$) |
| Rosemont | Village | Cook | 3,952 | 4,202 | −5.9% | 1.792 | 4.64 | 2,205.4/sq mi (851.5/km$^2$) |
| Roseville | Village | Warren | 892 | 989 | −9.8% | 0.739 | 1.91 | 1,207.0/sq mi (466.0/km$^2$) |
| Rosiclare | City | Hardin | 980 | 1,160 | −15.5% | 1.939 | 5.02 | 505.4/sq mi (195.1/km$^2$) |
| Rossville | Village | Vermilion | 1,221 | 1,331 | −8.3% | 1.398 | 3.62 | 873.4/sq mi (337.2/km$^2$) |
| Round Lake | Village | Lake | 18,721 | 18,289 | +2.4% | 5.557 | 14.39 | 3,368.9/sq mi (1,300.7/km$^2$) |
| Round Lake Beach | Village | Lake | 27,252 | 28,175 | −3.3% | 5.044 | 13.06 | 5,402.9/sq mi (2,086.1/km$^2$) |
| Round Lake Heights | Village | Lake | 2,622 | 2,676 | −2.0% | 0.575 | 1.49 | 4,560.0/sq mi (1,760.6/km$^2$) |
| Round Lake Park | Village | Lake | 7,680 | 7,505 | +2.3% | 2.063 | 5.34 | 3,722.7/sq mi (1,437.4/km$^2$) |
| Roxana | Village | Madison | 1,454 | 1,542 | −5.7% | 7.101 | 18.39 | 204.8/sq mi (79.1/km$^2$) |
| Royal | Village | Champaign | 293 | 293 | 0.0% | 0.183 | 0.47 | 1,601.1/sq mi (618.2/km$^2$) |
| Royal Lakes | Village | Macoupin | 167 | 197 | −15.2% | 0.466 | 1.21 | 358.4/sq mi (138.4/km$^2$) |
| Royalton | Village | Franklin | 1,068 | 1,151 | −7.2% | 1.115 | 2.89 | 957.8/sq mi (369.8/km$^2$) |
| Ruma | Village | Randolph | 313 | 317 | −1.3% | 0.742 | 1.92 | 421.8/sq mi (162.9/km$^2$) |
| Rushville† | City | Schuyler | 3,005 | 3,192 | −5.9% | 1.652 | 4.28 | 1,819.0/sq mi (702.3/km$^2$) |
| Russellville | Village | Lawrence | 98 | 94 | +4.3% | 0.400 | 1.04 | 245.0/sq mi (94.6/km$^2$) |
| Rutland | Village | LaSalle | 259 | 318 | −18.6% | 0.694 | 1.80 | 373.2/sq mi (144.1/km$^2$) |
| Sadorus | Village | Champaign | 402 | 416 | −3.4% | 1.027 | 2.66 | 391.4/sq mi (151.1/km$^2$) |
| Sailor Springs | Village | Clay | 89 | 95 | −6.3% | 0.260 | 0.67 | 342.3/sq mi (132.2/km$^2$) |
| St. Anne | Village | Kankakee | 1,161 | 1,257 | −7.6% | 0.830 | 2.15 | 1,398.8/sq mi (540.1/km$^2$) |
| St. Augustine | Village | Knox | 119 | 120 | −0.8% | 0.593 | 1.54 | 200.7/sq mi (77.5/km$^2$) |
| St. Charles | City | Kane DuPage | 33,081 | 32,974 | +0.3% | 14.401 | 37.30 | 2,297.1/sq mi (886.9/km$^2$) |
| St. David | Village | Fulton | 522 | 589 | −11.4% | 0.299 | 0.77 | 1,745.8/sq mi (674.1/km$^2$) |
| St. Elmo | City | Fayette | 1,254 | 1,426 | −12.1% | 1.483 | 3.84 | 845.6/sq mi (326.5/km$^2$) |
| Ste. Marie | Village | Jasper | 238 | 244 | −2.5% | 1.109 | 2.87 | 214.6/sq mi (82.9/km$^2$) |
| St. Francisville | City | Lawrence | 568 | 697 | −18.5% | 0.745 | 1.93 | 762.4/sq mi (294.4/km$^2$) |
| St. Jacob | Village | Madison | 1,358 | 1,098 | +23.7% | 0.832 | 2.15 | 1,632.2/sq mi (630.2/km$^2$) |
| St. Johns | Village | Perry | 163 | 219 | −25.6% | 0.725 | 1.88 | 224.8/sq mi (86.8/km$^2$) |
| St. Joseph | Village | Champaign | 3,810 | 3,967 | −4.0% | 2.083 | 5.39 | 1,829.1/sq mi (706.2/km$^2$) |
| St. Libory | Village | St. Clair | 628 | 615 | +2.1% | 0.972 | 2.52 | 646.1/sq mi (249.5/km$^2$) |
| St. Peter | Village | Fayette | 322 | 359 | −10.3% | 0.521 | 1.35 | 618.0/sq mi (238.6/km$^2$) |
| St. Rose | Village | Clinton | 459 | - | - | 0.591 | 1.53 | 776.6/sq mi (299.9/km$^2$) |
| Salem† | City | Marion | 7,282 | 7,485 | −2.7% | 6.991 | 18.11 | 1,041.6/sq mi (402.2/km$^2$) |
| Sammons Point | Village | Kankakee | 214 | 279 | −23.3% | 1.851 | 4.79 | 115.6/sq mi (44.6/km$^2$) |
| Sandoval | Village | Marion | 1,157 | 1,274 | −9.2% | 0.996 | 2.58 | 1,161.6/sq mi (448.5/km$^2$) |
| Sandwich | City | DeKalb Kendall | 7,221 | 7,421 | −2.7% | 4.736 | 12.27 | 1,524.7/sq mi (588.7/km$^2$) |
| San Jose | Village | Logan Mason | 479 | 642 | −25.4% | 0.414 | 1.07 | 1,157.0/sq mi (446.7/km$^2$) |
| Sauget | Village | St. Clair | 141 | 159 | −11.3% | 4.581 | 11.86 | 30.8/sq mi (11.9/km$^2$) |
| Sauk Village | Village | Cook | 9,921 | 10,506 | −5.6% | 3.992 | 10.34 | 2,485.2/sq mi (959.5/km$^2$) |
| Saunemin | Village | Livingston | 406 | 420 | −3.3% | 0.231 | 0.60 | 1,757.6/sq mi (678.6/km$^2$) |
| Savanna | City | Carroll | 2,783 | 3,062 | −9.1% | 2.616 | 6.78 | 1,063.8/sq mi (410.8/km$^2$) |
| Savoy | Village | Champaign | 8,857 | 7,280 | +21.7% | 3.233 | 8.37 | 2,739.6/sq mi (1,057.8/km$^2$) |
| Sawyerville | Village | Macoupin | 268 | 279 | −3.9% | 0.988 | 2.56 | 271.3/sq mi (104.7/km$^2$) |
| Saybrook | Village | McLean | 654 | 693 | −5.6% | 0.802 | 2.08 | 815.5/sq mi (314.9/km$^2$) |
| Scales Mound | Village | Jo Daviess | 436 | 376 | +16.0% | 0.628 | 1.63 | 694.3/sq mi (268.1/km$^2$) |
| Schaumburg | Village | Cook | 78,723 | 74,227 | +6.1% | 19.293 | 49.97 | 4,080.4/sq mi (1,575.4/km$^2$) |
| Schiller Park | Village | Cook | 11,709 | 11,793 | −0.7% | 2.770 | 7.17 | 4,227.1/sq mi (1,632.1/km$^2$) |
| Schram City | Village | Montgomery | 563 | 586 | −3.9% | 0.674 | 1.75 | 835.3/sq mi (322.5/km$^2$) |
| Sciota | Village | McDonough | 38 | 61 | −37.7% | 0.312 | 0.81 | 121.8/sq mi (47.0/km$^2$) |
| Scottville | Village | Macoupin | 93 | 116 | −19.8% | 0.997 | 2.58 | 93.3/sq mi (36.0/km$^2$) |
| Seaton | Village | Mercer | 214 | 222 | −3.6% | 1.579 | 4.09 | 135.5/sq mi (52.3/km$^2$) |
| Seatonville | Village | Bureau | 321 | 314 | +2.2% | 0.496 | 1.28 | 647.2/sq mi (249.9/km$^2$) |
| Secor | Village | Woodford | 342 | 373 | −8.3% | 0.290 | 0.75 | 1,179.3/sq mi (455.3/km$^2$) |
| Seneca | Village | LaSalle | 2,353 | 2,371 | −0.8% | 6.417 | 16.62 | 366.7/sq mi (141.6/km$^2$) |
| Sesser | City | Franklin | 1,888 | 1,931 | −2.2% | 1.030 | 2.67 | 1,833.0/sq mi (707.7/km$^2$) |
| Shabbona | Village | DeKalb | 863 | 925 | −6.7% | 1.283 | 3.32 | 672.6/sq mi (259.7/km$^2$) |
| Shannon | Village | Carroll | 801 | 757 | +5.8% | 0.482 | 1.25 | 1,661.8/sq mi (641.6/km$^2$) |
| Shawneetown† | City | Gallatin | 1,054 | 1,239 | −14.9% | 0.734 | 1.90 | 1,436.0/sq mi (554.4/km$^2$) |
| Sheffield | Village | Bureau | 821 | 926 | −11.3% | 1.169 | 3.03 | 702.3/sq mi (271.2/km$^2$) |
| Shelbyville† | City | Shelby | 4,674 | 4,700 | −0.6% | 4.076 | 10.56 | 1,146.7/sq mi (442.7/km$^2$) |
| Sheldon | Village | Iroquois | 965 | 1,070 | −9.8% | 0.753 | 1.95 | 1,281.5/sq mi (494.8/km$^2$) |
| Sheridan | Village | LaSalle | 2,431 | 2,137 | +13.8% | 2.121 | 5.49 | 1,146.2/sq mi (442.5/km$^2$) |
| Sherman | Village | Sangamon | 4,673 | 4,148 | +12.7% | 3.127 | 8.10 | 1,494.4/sq mi (577.0/km$^2$) |
| Sherrard | Village | Mercer | 692 | 640 | +8.1% | 0.928 | 2.40 | 745.7/sq mi (287.9/km$^2$) |
| Shiloh | Village | St. Clair | 14,098 | 12,651 | +11.4% | 11.032 | 28.57 | 1,277.9/sq mi (493.4/km$^2$) |
| Shipman | Town | Macoupin | 511 | 624 | −18.1% | 1.320 | 3.42 | 387.1/sq mi (149.5/km$^2$) |
| Shorewood | Village | Will | 18,186 | 15,615 | +16.5% | 8.069 | 20.90 | 2,253.8/sq mi (870.2/km$^2$) |
| Shumway | Village | Effingham | 188 | 202 | −6.9% | 0.332 | 0.86 | 566.3/sq mi (218.6/km$^2$) |
| Sibley | Village | Ford | 288 | 272 | +5.9% | 0.481 | 1.25 | 598.8/sq mi (231.2/km$^2$) |
| Sidell | Village | Vermilion | 489 | 617 | −20.7% | 0.927 | 2.40 | 527.5/sq mi (203.7/km$^2$) |
| Sidney | Village | Champaign | 1,208 | 1,233 | −2.0% | 0.624 | 1.62 | 1,935.9/sq mi (747.5/km$^2$) |
| Sigel | Town | Shelby | 329 | 373 | −11.8% | 0.281 | 0.73 | 1,170.8/sq mi (452.1/km$^2$) |
| Silvis | City | Rock Island | 8,003 | 7,479 | +7.0% | 4.285 | 11.10 | 1,867.7/sq mi (721.1/km$^2$) |
| Simpson | Village | Johnson | 44 | 60 | −26.7% | 0.525 | 1.36 | 83.8/sq mi (32.4/km$^2$) |
| Sims | Village | Wayne | 166 | 252 | −34.1% | 1.182 | 3.06 | 140.4/sq mi (54.2/km$^2$) |
| Skokie | Village | Cook | 67,824 | 64,784 | +4.7% | 10.064 | 26.07 | 6,739.3/sq mi (2,602.0/km$^2$) |
| Sleepy Hollow | Village | Kane | 3,214 | 3,304 | −2.7% | 2.019 | 5.23 | 1,591.9/sq mi (614.6/km$^2$) |
| Smithboro | Village | Bond | 154 | 177 | −13.0% | 0.932 | 2.41 | 165.2/sq mi (63.8/km$^2$) |
| Smithfield | Village | Fulton | 191 | 230 | −17.0% | 0.465 | 1.20 | 410.8/sq mi (158.6/km$^2$) |
| Smithton | Village | St. Clair | 4,006 | 3,693 | +8.5% | 4.435 | 11.49 | 903.3/sq mi (348.8/km$^2$) |
| Somonauk | Village | DeKalb LaSalle | 1,786 | 1,893 | −5.7% | 2.488 | 6.44 | 717.8/sq mi (277.2/km$^2$) |
| Sorento | Village | Bond | 429 | 498 | −13.9% | 0.798 | 2.07 | 537.6/sq mi (207.6/km$^2$) |
| South Barrington | Village | Cook | 5,077 | 4,565 | +11.2% | 7.427 | 19.24 | 683.6/sq mi (263.9/km$^2$) |
| South Beloit | City | Winnebago | 7,989 | 7,892 | +1.2% | 6.144 | 15.91 | 1,300.3/sq mi (502.0/km$^2$) |
| South Chicago Heights | Village | Cook | 4,026 | 4,139 | −2.7% | 1.581 | 4.09 | 2,546.5/sq mi (983.2/km$^2$) |
| South Elgin | Village | Kane | 23,865 | 21,985 | +8.6% | 7.060 | 18.29 | 3,380.3/sq mi (1,305.1/km$^2$) |
| Southern View | Village | Sangamon | 1,596 | 1,642 | −2.8% | 0.647 | 1.68 | 2,466.8/sq mi (952.4/km$^2$) |
| South Holland | Village | Cook | 21,465 | 22,030 | −2.6% | 7.236 | 18.74 | 2,966.4/sq mi (1,145.3/km$^2$) |
| South Jacksonville | Village | Morgan | 3,302 | 3,331 | −0.9% | 2.273 | 5.89 | 1,452.7/sq mi (560.9/km$^2$) |
| South Pekin | Village | Tazewell | 996 | 1,146 | −13.1% | 0.515 | 1.33 | 1,934.0/sq mi (746.7/km$^2$) |
| South Roxana | Village | Madison | 1,891 | 2,053 | −7.9% | 2.158 | 5.59 | 876.3/sq mi (338.3/km$^2$) |
| South Wilmington | Village | Grundy | 710 | 681 | +4.3% | 0.492 | 1.27 | 1,443.1/sq mi (557.2/km$^2$) |
| Sparland | Village | Marshall | 366 | 406 | −9.9% | 0.572 | 1.48 | 639.9/sq mi (247.1/km$^2$) |
| Sparta | City | Randolph | 4,095 | 4,302 | −4.8% | 11.170 | 28.93 | 366.6/sq mi (141.5/km$^2$) |
| Spaulding | Village | Sangamon | 801 | 873 | −8.2% | 0.750 | 1.94 | 1,068.0/sq mi (412.4/km$^2$) |
| Spillertown | Village | Williamson | 181 | 203 | −10.8% | 0.321 | 0.83 | 563.9/sq mi (217.7/km$^2$) |
| Spring Bay | Village | Woodford | 474 | 452 | +4.9% | 0.683 | 1.77 | 694.0/sq mi (268.0/km$^2$) |
| Springerton | Village | White | 101 | 110 | −8.2% | 0.126 | 0.33 | 801.6/sq mi (309.5/km$^2$) |
| Springfield‡† | City | Sangamon | 114,394 | 116,250 | −1.6% | 61.138 | 158.35 | 1,871.1/sq mi (722.4/km$^2$) |
| Spring Grove | Village | McHenry | 5,487 | 5,778 | −5.0% | 9.046 | 23.43 | 606.6/sq mi (234.2/km$^2$) |
| Spring Valley | City | Bureau | 5,582 | 5,558 | +0.4% | 7.356 | 19.05 | 758.8/sq mi (293.0/km$^2$) |
| Standard | Village | Putnam | 225 | 220 | +2.3% | 0.711 | 1.84 | 316.5/sq mi (122.2/km$^2$) |
| Standard City | Village | Macoupin | 135 | 152 | −11.2% | 0.636 | 1.65 | 212.3/sq mi (82.0/km$^2$) |
| Stanford | Village | McLean | 600 | 596 | +0.7% | 0.662 | 1.71 | 906.3/sq mi (349.9/km$^2$) |
| Staunton | City | Macoupin | 5,054 | 5,139 | −1.7% | 3.974 | 10.29 | 1,271.8/sq mi (491.0/km$^2$) |
| Steeleville | Village | Randolph | 1,930 | 2,083 | −7.3% | 1.523 | 3.94 | 1,267.2/sq mi (489.3/km$^2$) |
| Steger | Village | Cook Will | 9,584 | 9,570 | +0.1% | 3.404 | 8.82 | 2,815.5/sq mi (1,087.1/km$^2$) |
| Sterling | City | Whiteside | 14,764 | 15,370 | −3.9% | 5.791 | 15.00 | 2,549.5/sq mi (984.4/km$^2$) |
| Steward | Village | Lee | 229 | 256 | −10.5% | 0.269 | 0.70 | 851.3/sq mi (328.7/km$^2$) |
| Stewardson | Village | Shelby | 721 | 734 | −1.8% | 0.610 | 1.58 | 1,182.0/sq mi (456.4/km$^2$) |
| Stickney | Village | Cook | 7,110 | 6,786 | +4.8% | 1.924 | 4.98 | 3,695.4/sq mi (1,426.8/km$^2$) |
| Stillman Valley | Village | Ogle | 1,075 | 1,120 | −4.0% | 0.570 | 1.48 | 1,886.0/sq mi (728.2/km$^2$) |
| Stockton | Village | Jo Daviess | 1,728 | 1,862 | −7.2% | 1.877 | 4.86 | 920.6/sq mi (355.5/km$^2$) |
| Stonefort | Village | Williamson Saline | 224 | 297 | −24.6% | 1.454 | 3.77 | 154.1/sq mi (59.5/km$^2$) |
| Stone Park | Village | Cook | 4,576 | 4,946 | −7.5% | 0.344 | 0.89 | 13,302.3/sq mi (5,136.1/km$^2$) |
| Stonington | Village | Christian | 837 | 932 | −10.2% | 0.457 | 1.18 | 1,831.5/sq mi (707.1/km$^2$) |
| Stoy | Village | Crawford | 108 | 104 | +3.8% | 0.932 | 2.41 | 115.9/sq mi (44.7/km$^2$) |
| Strasburg | Village | Shelby | 531 | 467 | +13.7% | 0.541 | 1.40 | 981.5/sq mi (379.0/km$^2$) |
| Strawn | Village | Livingston | 101 | 100 | +1.0% | 0.510 | 1.32 | 198.0/sq mi (76.5/km$^2$) |
| Streamwood | Village | Cook | 39,577 | 39,858 | −0.7% | 7.798 | 20.20 | 5,075.3/sq mi (1,959.6/km$^2$) |
| Streator | City | LaSalle Livingston | 12,500 | 13,710 | −8.8% | 7.293 | 18.89 | 1,714.0/sq mi (661.8/km$^2$) |
| Stronghurst | Village | Henderson | 833 | 883 | −5.7% | 0.873 | 2.26 | 954.2/sq mi (368.4/km$^2$) |
| Sublette | Village | Lee | 380 | 449 | −15.4% | 0.321 | 0.83 | 1,183.8/sq mi (457.1/km$^2$) |
| Sugar Grove | Village | Kane | 9,278 | 8,997 | +3.1% | 11.748 | 30.43 | 789.8/sq mi (304.9/km$^2$) |
| Sullivan† | City | Moultrie | 4,413 | 4,440 | −0.6% | 2.769 | 7.17 | 1,593.7/sq mi (615.3/km$^2$) |
| Summerfield | Village | St. Clair | 347 | 451 | −23.1% | 0.495 | 1.28 | 701.0/sq mi (270.7/km$^2$) |
| Summit | Village | Cook | 11,161 | 11,054 | +1.0% | 2.119 | 5.49 | 5,267.1/sq mi (2,033.6/km$^2$) |
| Sumner | City | Lawrence | 2,631 | 3,174 | −17.1% | 1.398 | 3.62 | 1,882.0/sq mi (726.6/km$^2$) |
| Sun River Terrace | Village | Kankakee | 455 | 528 | −13.8% | 0.573 | 1.48 | 794.1/sq mi (306.6/km$^2$) |
| Swansea | Village | St. Clair | 14,386 | 13,430 | +7.1% | 6.477 | 16.78 | 2,221.1/sq mi (857.6/km$^2$) |
| Sycamore† | City | DeKalb | 18,577 | 17,519 | +6.0% | 10.120 | 26.21 | 1,835.7/sq mi (708.8/km$^2$) |
| Symerton | Village | Will | 128 | 87 | +47.1% | 0.157 | 0.41 | 815.3/sq mi (314.8/km$^2$) |
| Table Grove | Village | Fulton | 353 | 416 | −15.1% | 0.282 | 0.73 | 1,251.8/sq mi (483.3/km$^2$) |
| Tallula | Village | Menard | 434 | 488 | −11.1% | 0.531 | 1.38 | 817.3/sq mi (315.6/km$^2$) |
| Tamaroa | Village | Perry | 544 | 638 | −14.7% | 0.958 | 2.48 | 567.8/sq mi (219.2/km$^2$) |
| Tamms | Village | Alexander | 430 | 632 | −32.0% | 2.332 | 6.04 | 184.4/sq mi (71.2/km$^2$) |
| Tampico | Village | Whiteside | 689 | 790 | −12.8% | 0.394 | 1.02 | 1,748.7/sq mi (675.2/km$^2$) |
| Taylor Springs | Village | Montgomery | 724 | 690 | +4.9% | 1.050 | 2.72 | 689.5/sq mi (266.2/km$^2$) |
| Taylorville† | City | Christian | 10,506 | 11,246 | −6.6% | 10.315 | 26.72 | 1,018.5/sq mi (393.3/km$^2$) |
| Tennessee | Village | McDonough | 101 | 115 | −12.2% | 0.425 | 1.10 | 237.6/sq mi (91.8/km$^2$) |
| Teutopolis | Village | Effingham | 1,618 | 1,530 | +5.8% | 2.043 | 5.29 | 792.0/sq mi (305.8/km$^2$) |
| Thawville | Village | Iroquois | 215 | 241 | −10.8% | 0.307 | 0.80 | 700.3/sq mi (270.4/km$^2$) |
| Thayer | Village | Sangamon | 632 | 693 | −8.8% | 0.610 | 1.58 | 1,036.1/sq mi (400.0/km$^2$) |
| Thebes | Village | Alexander | 208 | 436 | −52.3% | 1.745 | 4.52 | 119.2/sq mi (46.0/km$^2$) |
| Third Lake | Village | Lake | 1,111 | 1,182 | −6.0% | 0.586 | 1.52 | 1,895.9/sq mi (732.0/km$^2$) |
| Thomasboro | Village | Champaign | 1,034 | 1,126 | −8.2% | 0.995 | 2.58 | 1,039.2/sq mi (401.2/km$^2$) |
| Thompsonville | Village | Franklin | 486 | 543 | −10.5% | 2.031 | 5.26 | 239.3/sq mi (92.4/km$^2$) |
| Thomson | Village | Carroll | 1,610 | 590 | +172.9% | 2.219 | 5.75 | 725.6/sq mi (280.1/km$^2$) |
| Thornton | Village | Cook | 2,386 | 2,338 | +2.1% | 2.375 | 6.15 | 1,004.6/sq mi (387.9/km$^2$) |
| Tilden | Village | Randolph | 750 | 934 | −19.7% | 0.975 | 2.53 | 769.2/sq mi (297.0/km$^2$) |
| Tilton | Village | Vermilion | 2,660 | 2,724 | −2.3% | 3.788 | 9.81 | 702.2/sq mi (271.1/km$^2$) |
| Timberlane | Village | Boone | 906 | 934 | −3.0% | 1.746 | 4.52 | 518.9/sq mi (200.3/km$^2$) |
| Time | Village | Pike | 26 | 23 | +13.0% | 0.254 | 0.66 | 102.4/sq mi (39.5/km$^2$) |
| Tinley Park | Village | Cook Will | 55,971 | 56,703 | −1.3% | 16.096 | 41.69 | 3,477.3/sq mi (1,342.6/km$^2$) |
| Tiskilwa | Village | Bureau | 740 | 829 | −10.7% | 0.517 | 1.34 | 1,431.3/sq mi (552.6/km$^2$) |
| Toledo† | Village | Cumberland | 1,161 | 1,238 | −6.2% | 0.888 | 2.30 | 1,307.4/sq mi (504.8/km$^2$) |
| Tolono | Village | Champaign | 3,604 | 3,447 | +4.6% | 2.061 | 5.34 | 1,748.7/sq mi (675.2/km$^2$) |
| Toluca | City | Marshall | 1,340 | 1,414 | −5.2% | 1.062 | 2.75 | 1,261.8/sq mi (487.2/km$^2$) |
| Tonica | Village | LaSalle | 749 | 768 | −2.5% | 1.363 | 3.53 | 549.5/sq mi (212.2/km$^2$) |
| Topeka | Village | Mason | 60 | 76 | −21.1% | 0.137 | 0.35 | 438.0/sq mi (169.1/km$^2$) |
| Toulon† | City | Stark | 1,193 | 1,292 | −7.7% | 1.017 | 2.63 | 1,173.1/sq mi (452.9/km$^2$) |
| Tovey | Village | Christian | 464 | 512 | −9.4% | 0.223 | 0.58 | 2,080.7/sq mi (803.4/km$^2$) |
| Towanda | Village | McLean | 431 | 480 | −10.2% | 0.744 | 1.93 | 579.3/sq mi (223.7/km$^2$) |
| Tower Hill | Village | Shelby | 485 | 611 | −20.6% | 1.005 | 2.60 | 482.6/sq mi (186.3/km$^2$) |
| Tower Lakes | Village | Lake | 1,226 | 1,283 | −4.4% | 0.919 | 2.38 | 1,334.1/sq mi (515.1/km$^2$) |
| Tremont | Village | Tazewell | 2,277 | 2,236 | +1.8% | 1.120 | 2.90 | 2,033.0/sq mi (785.0/km$^2$) |
| Trenton | City | Clinton | 2,690 | 2,715 | −0.9% | 1.880 | 4.87 | 1,430.9/sq mi (552.5/km$^2$) |
| Trout Valley | Village | McHenry | 515 | 537 | −4.1% | 0.428 | 1.11 | 1,203.3/sq mi (464.6/km$^2$) |
| Troy | City | Madison | 10,960 | 9,888 | +10.8% | 5.620 | 14.56 | 1,950.2/sq mi (753.0/km$^2$) |
| Troy Grove | Village | LaSalle | 225 | 250 | −10.0% | 0.687 | 1.78 | 327.5/sq mi (126.5/km$^2$) |
| Tuscola† | City | Douglas | 4,636 | 4,480 | +3.5% | 2.878 | 7.45 | 1,610.8/sq mi (621.9/km$^2$) |
| Ullin | Village | Pulaski | 466 | 463 | +0.6% | 2.811 | 7.28 | 165.8/sq mi (64.0/km$^2$) |
| Union | Village | McHenry | 551 | 580 | −5.0% | 0.836 | 2.17 | 659.1/sq mi (254.5/km$^2$) |
| Union Hill | Village | Kankakee | 55 | 58 | −5.2% | 0.046 | 0.12 | 1,195.7/sq mi (461.6/km$^2$) |
| University Park | Village | Cook | 7,145 | 7,129 | +0.2% | 10.727 | 27.78 | 666.1/sq mi (257.2/km$^2$) |
| Urbana† | City | Champaign | 38,336 | 41,250 | −7.1% | 11.830 | 30.64 | 3,240.6/sq mi (1,251.2/km$^2$) |
| Ursa | Village | Adams | 609 | 626 | −2.7% | 0.690 | 1.79 | 882.6/sq mi (340.8/km$^2$) |
| Valier | Village | Franklin | 554 | 669 | −17.2% | 1.124 | 2.91 | 492.9/sq mi (190.3/km$^2$) |
| Valley City | Village | Pike | 14 | 13 | +7.7% | 0.270 | 0.70 | 51.9/sq mi (20.0/km$^2$) |
| Valmeyer | Village | Monroe | 1,233 | 1,263 | −2.4% | 3.417 | 8.85 | 360.8/sq mi (139.3/km$^2$) |
| Vandalia† | City | Fayette | 7,458 | 7,042 | +5.9% | 8.147 | 21.10 | 915.4/sq mi (353.4/km$^2$) |
| Varna | Village | Marshall | 375 | 384 | −2.3% | 0.297 | 0.77 | 1,262.6/sq mi (487.5/km$^2$) |
| Venedy | Village | Washington | 121 | 138 | −12.3% | 0.281 | 0.73 | 430.6/sq mi (166.3/km$^2$) |
| Venice | City | Madison | 1,498 | 1,890 | −20.7% | 1.849 | 4.79 | 810.2/sq mi (312.8/km$^2$) |
| Vergennes | Village | Jackson | 235 | 298 | −21.1% | 0.352 | 0.91 | 667.6/sq mi (257.8/km$^2$) |
| Vermilion | Village | Edgar | 203 | 225 | −9.8% | 0.546 | 1.41 | 371.8/sq mi (143.6/km$^2$) |
| Vermont | Village | Fulton | 570 | 667 | −14.5% | 1.258 | 3.26 | 453.1/sq mi (174.9/km$^2$) |
| Vernon | Village | Marion | 103 | 129 | −20.2% | 0.882 | 2.28 | 116.8/sq mi (45.1/km$^2$) |
| Vernon Hills | Village | Lake | 26,850 | 25,113 | +6.9% | 7.741 | 20.05 | 3,468.5/sq mi (1,339.2/km$^2$) |
| Verona | Village | Grundy | 208 | 215 | −3.3% | 0.165 | 0.43 | 1,260.6/sq mi (486.7/km$^2$) |
| Versailles | Village | Brown | 446 | 478 | −6.7% | 0.933 | 2.42 | 478.0/sq mi (184.6/km$^2$) |
| Victoria | Village | Knox | 268 | 316 | −15.2% | 0.451 | 1.17 | 594.2/sq mi (229.4/km$^2$) |
| Vienna† | City | Johnson | 1,343 | 1,434 | −6.3% | 2.837 | 7.35 | 473.4/sq mi (182.8/km$^2$) |
| Villa Grove | City | Douglas | 2,472 | 2,537 | −2.6% | 1.502 | 3.89 | 1,645.8/sq mi (635.4/km$^2$) |
| Villa Park | Village | DuPage | 22,263 | 21,904 | +1.6% | 4.723 | 12.23 | 4,713.7/sq mi (1,820.0/km$^2$) |
| Viola | Village | Mercer | 869 | 955 | −9.0% | 0.838 | 2.17 | 1,037.0/sq mi (400.4/km$^2$) |
| Virden | City | Macoupin Sangamon | 3,231 | 3,425 | −5.7% | 1.889 | 4.89 | 1,710.4/sq mi (660.4/km$^2$) |
| Virgil | Village | Kane | 289 | 329 | −12.2% | 2.183 | 5.65 | 132.4/sq mi (51.1/km$^2$) |
| Virginia† | City | Cass | 1,514 | 1,611 | −6.0% | 1.207 | 3.13 | 1,254.3/sq mi (484.3/km$^2$) |
| Volo | Village | Lake | 6,122 | 2,929 | +109.0% | 3.915 | 10.14 | 1,563.7/sq mi (603.8/km$^2$) |
| Wadsworth | Village | Lake | 3,517 | 3,815 | −7.8% | 9.857 | 25.53 | 356.8/sq mi (137.8/km$^2$) |
| Waggoner | Village | Montgomery | 181 | 266 | −32.0% | 0.244 | 0.63 | 741.8/sq mi (286.4/km$^2$) |
| Walnut | Village | Bureau | 1,311 | 1,416 | −7.4% | 0.801 | 2.07 | 1,636.7/sq mi (631.9/km$^2$) |
| Walnut Hill | Village | Marion | 95 | 108 | −12.0% | 0.380 | 0.98 | 250.0/sq mi (96.5/km$^2$) |
| Walshville | Village | Montgomery | 61 | 64 | −4.7% | 0.257 | 0.67 | 237.4/sq mi (91.6/km$^2$) |
| Waltonville | Village | Jefferson | 408 | 434 | −6.0% | 1.240 | 3.21 | 329.0/sq mi (127.0/km$^2$) |
| Wamac | City | Clinton Marion Washington | 985 | 1,185 | −16.9% | 1.405 | 3.64 | 701.1/sq mi (270.7/km$^2$) |
| Wapella | Village | De Witt | 513 | 558 | −8.1% | 0.551 | 1.43 | 931.0/sq mi (359.5/km$^2$) |
| Warren | Village | Jo Daviess | 1,323 | 1,428 | −7.4% | 1.033 | 2.68 | 1,280.7/sq mi (494.5/km$^2$) |
| Warrensburg | Village | Macon | 1,110 | 1,210 | −8.3% | 0.728 | 1.89 | 1,524.7/sq mi (588.7/km$^2$) |
| Warrenville | City | DuPage | 13,553 | 13,140 | +3.1% | 5.460 | 14.14 | 2,482.2/sq mi (958.4/km$^2$) |
| Warsaw | City | Hancock | 1,510 | 1,607 | −6.0% | 6.520 | 16.89 | 231.6/sq mi (89.4/km$^2$) |
| Washburn | Village | Woodford Marshall | 1,032 | 1,155 | −10.6% | 0.720 | 1.86 | 1,433.3/sq mi (553.4/km$^2$) |
| Washington | City | Tazewell | 16,071 | 15,134 | +6.2% | 8.541 | 22.12 | 1,881.6/sq mi (726.5/km$^2$) |
| Washington Park | Village | St. Clair | 2,592 | 4,196 | −38.2% | 2.521 | 6.53 | 1,028.2/sq mi (397.0/km$^2$) |
| Wataga | Village | Knox | 744 | 843 | −11.7% | 0.829 | 2.15 | 897.5/sq mi (346.5/km$^2$) |
| Waterloo† | City | Monroe | 11,013 | 9,811 | +12.3% | 8.132 | 21.06 | 1,354.3/sq mi (522.9/km$^2$) |
| Waterman | Village | DeKalb | 1,433 | 1,506 | −4.8% | 1.451 | 3.76 | 987.6/sq mi (381.3/km$^2$) |
| Watseka† | City | Iroquois | 4,679 | 5,255 | −11.0% | 2.944 | 7.62 | 1,589.3/sq mi (613.6/km$^2$) |
| Watson | Village | Effingham | 668 | 754 | −11.4% | 1.092 | 2.83 | 611.7/sq mi (236.2/km$^2$) |
| Wauconda | Village | Lake | 14,084 | 13,603 | +3.5% | 5.072 | 13.14 | 2,776.8/sq mi (1,072.1/km$^2$) |
| Waukegan† | City | Lake | 89,321 | 89,078 | +0.3% | 24.225 | 62.74 | 3,687.1/sq mi (1,423.6/km$^2$) |
| Waverly | City | Morgan | 1,194 | 1,307 | −8.6% | 1.036 | 2.68 | 1,152.5/sq mi (445.0/km$^2$) |
| Wayne | Village | DuPage Kane | 2,286 | 2,431 | −6.0% | 5.730 | 14.84 | 399.0/sq mi (154.0/km$^2$) |
| Wayne City | Village | Wayne | 994 | 1,032 | −3.7% | 1.722 | 4.46 | 577.2/sq mi (222.9/km$^2$) |
| Waynesville | Village | De Witt | 381 | 434 | −12.2% | 0.319 | 0.83 | 1,194.4/sq mi (461.1/km$^2$) |
| Weldon | Village | De Witt | 369 | 429 | −14.0% | 0.267 | 0.69 | 1,382.0/sq mi (533.6/km$^2$) |
| Wellington | Village | Iroquois | 206 | 242 | −14.9% | 0.238 | 0.62 | 865.5/sq mi (334.2/km$^2$) |
| Wenona | City | Marshall | 974 | 1,056 | −7.8% | 0.736 | 1.91 | 1,323.4/sq mi (511.0/km$^2$) |
| Wenonah | Village | Montgomery | 32 | 37 | −13.5% | 1.514 | 3.92 | 21.1/sq mi (8.2/km$^2$) |
| West Brooklyn | Village | Lee | 131 | 142 | −7.7% | 0.085 | 0.22 | 1,541.2/sq mi (595.1/km$^2$) |
| Westchester | Village | Cook | 16,892 | 16,718 | +1.0% | 3.686 | 9.55 | 4,582.7/sq mi (1,769.4/km$^2$) |
| West Chicago | City | DuPage | 25,614 | 27,086 | −5.4% | 15.376 | 39.82 | 1,665.8/sq mi (643.2/km$^2$) |
| West City | Village | Franklin | 656 | 661 | −0.8% | 1.608 | 4.16 | 408.0/sq mi (157.5/km$^2$) |
| West Dundee | Village | Kane | 7,686 | 7,331 | +4.8% | 3.637 | 9.42 | 2,113.3/sq mi (815.9/km$^2$) |
| Western Springs | Village | Cook | 13,629 | 12,975 | +5.0% | 2.785 | 7.21 | 4,893.7/sq mi (1,889.5/km$^2$) |
| Westfield | Village | Clark | 536 | 601 | −10.8% | 0.978 | 2.53 | 548.1/sq mi (211.6/km$^2$) |
| West Frankfort | City | Franklin | 7,275 | 8,182 | −11.1% | 4.980 | 12.90 | 1,460.8/sq mi (564.0/km$^2$) |
| Westmont | Village | DuPage | 24,429 | 24,685 | −1.0% | 5.004 | 12.96 | 4,881.9/sq mi (1,884.9/km$^2$) |
| West Peoria | City | Peoria | 4,263 | 4,458 | −4.4% | 2.106 | 5.45 | 2,024.2/sq mi (781.6/km$^2$) |
| West Point | Village | Hancock | 140 | 178 | −21.3% | 0.168 | 0.44 | 833.3/sq mi (321.8/km$^2$) |
| West Salem | Village | Edwards | 786 | 897 | −12.4% | 1.560 | 4.04 | 503.8/sq mi (194.5/km$^2$) |
| Westville | Village | Vermilion | 3,167 | 3,202 | −1.1% | 1.678 | 4.35 | 1,887.4/sq mi (728.7/km$^2$) |
| Wheaton† | City | DuPage | 53,970 | 52,894 | +2.0% | 11.319 | 29.32 | 4,768.1/sq mi (1,841.0/km$^2$) |
| Wheeler | Village | Jasper | 96 | 147 | −34.7% | 0.576 | 1.49 | 166.7/sq mi (64.4/km$^2$) |
| Wheeling | Village | Cook | 39,137 | 37,648 | +4.0% | 8.672 | 22.46 | 4,513.0/sq mi (1,742.5/km$^2$) |
| White City | Village | Macoupin | 212 | 232 | −8.6% | 1.212 | 3.14 | 174.9/sq mi (67.5/km$^2$) |
| White Hall | City | Greene | 2,295 | 2,520 | −8.9% | 2.577 | 6.67 | 890.6/sq mi (343.9/km$^2$) |
| Williamsfield | Village | Knox | 575 | 578 | −0.5% | 1.231 | 3.19 | 467.1/sq mi (180.3/km$^2$) |
| Williamson | Village | Madison | 183 | 230 | −20.4% | 1.171 | 3.03 | 156.3/sq mi (60.3/km$^2$) |
| Williamsville | Village | Sangamon | 1,425 | 1,476 | −3.5% | 1.548 | 4.01 | 920.5/sq mi (355.4/km$^2$) |
| Willisville | Village | Perry | 579 | 633 | −8.5% | 0.389 | 1.01 | 1,488.4/sq mi (574.7/km$^2$) |
| Willowbrook | Village | DuPage | 9,236 | 8,540 | +8.1% | 2.572 | 6.66 | 3,591.0/sq mi (1,386.5/km$^2$) |
| Willow Hill | Village | Jasper | 172 | 230 | −25.2% | 1.039 | 2.69 | 165.5/sq mi (63.9/km$^2$) |
| Willow Springs | Village | Cook | 5,857 | 5,524 | +6.0% | 4.155 | 10.76 | 1,409.6/sq mi (544.3/km$^2$) |
| Wilmette | Village | Cook | 28,170 | 27,087 | +4.0% | 5.403 | 13.99 | 5,213.8/sq mi (2,013.0/km$^2$) |
| Wilmington | Village | Greene | 91 | 142 | −35.9% | 0.786 | 2.04 | 115.8/sq mi (44.7/km$^2$) |
| Wilmington | City | Will | 5,664 | 5,724 | −1.0% | 13.803 | 35.75 | 410.3/sq mi (158.4/km$^2$) |
| Wilsonville | Village | Macoupin | 536 | 586 | −8.5% | 0.956 | 2.48 | 560.7/sq mi (216.5/km$^2$) |
| Winchester† | City | Scott | 1,574 | 1,593 | −1.2% | 1.129 | 2.92 | 1,394.2/sq mi (538.3/km$^2$) |
| Windsor | Village | Mercer | 668 | 748 | −10.7% | 0.438 | 1.13 | 1,525.1/sq mi (588.8/km$^2$) |
| Windsor, Shelby County, Illinois | City | Shelby | 1,079 | 1,187 | −9.1% | 0.630 | 1.63 | 1,712.7/sq mi (661.3/km$^2$) |
| Winfield | Village | DuPage | 9,835 | 9,080 | +8.3% | 3.090 | 8.00 | 3,182.8/sq mi (1,228.9/km$^2$) |
| Winnebago | Village | Winnebago | 2,940 | 3,101 | −5.2% | 1.934 | 5.01 | 1,520.2/sq mi (586.9/km$^2$) |
| Winnetka | Village | Cook | 12,744 | 12,187 | +4.6% | 3.811 | 9.87 | 3,344.0/sq mi (1,291.1/km$^2$) |
| Winslow | Village | Stephenson | 281 | 338 | −16.9% | 0.458 | 1.19 | 613.5/sq mi (236.9/km$^2$) |
| Winthrop Harbor | Village | Lake | 6,705 | 6,742 | −0.5% | 4.637 | 12.01 | 1,446.0/sq mi (558.3/km$^2$) |
| Witt | City | Montgomery | 785 | 903 | −13.1% | 1.237 | 3.20 | 634.6/sq mi (245.0/km$^2$) |
| Wonder Lake | Village | McHenry | 3,973 | 4,026 | −1.3% | 4.964 | 12.86 | 800.4/sq mi (309.0/km$^2$) |
| Wood Dale | City | DuPage | 14,012 | 13,770 | +1.8% | 4.783 | 12.39 | 2,929.5/sq mi (1,131.1/km$^2$) |
| Woodhull | Village | Henry | 754 | 811 | −7.0% | 0.882 | 2.28 | 854.9/sq mi (330.1/km$^2$) |
| Woodland | Village | Iroquois | 248 | 324 | −23.5% | 0.490 | 1.27 | 506.1/sq mi (195.4/km$^2$) |
| Woodlawn | Village | Jefferson | 617 | 698 | −11.6% | 0.852 | 2.21 | 724.2/sq mi (279.6/km$^2$) |
| Woodridge | Village | DuPage | 34,158 | 32,971 | +3.6% | 9.645 | 24.98 | 3,541.5/sq mi (1,367.4/km$^2$) |
| Wood River | City | Madison | 10,464 | 10,657 | −1.8% | 6.975 | 18.07 | 1,500.2/sq mi (579.2/km$^2$) |
| Woodson | Village | Morgan | 498 | 512 | −2.7% | 0.394 | 1.02 | 1,264.0/sq mi (488.0/km$^2$) |
| Woodstock† | City | McHenry | 25,630 | 24,770 | +3.5% | 13.187 | 34.15 | 1,943.6/sq mi (750.4/km$^2$) |
| Worden | Village | Madison | 1,096 | 1,044 | +5.0% | 0.713 | 1.85 | 1,537.2/sq mi (593.5/km$^2$) |
| Worth | Village | Cook | 10,970 | 10,789 | +1.7% | 2.369 | 6.14 | 4,630.6/sq mi (1,787.9/km$^2$) |
| Wyanet | Village | Bureau | 886 | 991 | −10.6% | 0.946 | 2.45 | 936.6/sq mi (361.6/km$^2$) |
| Wyoming | City | Stark | 1,300 | 1,429 | −9.0% | 0.854 | 2.21 | 1,522.2/sq mi (587.7/km$^2$) |
| Xenia | Village | Clay | 380 | 391 | −2.8% | 0.493 | 1.28 | 770.8/sq mi (297.6/km$^2$) |
| Yale | Village | Jasper | 67 | 86 | −22.1% | 0.575 | 1.49 | 116.5/sq mi (45.0/km$^2$) |
| Yates City | Village | Knox | 642 | 693 | −7.4% | 0.493 | 1.28 | 1,302.2/sq mi (502.8/km$^2$) |
| Yorkville† | City | Kendall | 21,533 | 16,921 | +27.3% | 19.997 | 51.79 | 1,076.8/sq mi (415.8/km$^2$) |
| Zeigler | City | Franklin | 1,484 | 1,801 | −17.6% | 1.359 | 3.52 | 1,092.0/sq mi (421.6/km$^2$) |
| Zion | City | Lake | 24,655 | 24,413 | +1.0% | 9.904 | 25.65 | 2,489.4/sq mi (961.2/km$^2$) |
| Total municipalities | — | — | 11,170,271 | 11,127,961 | +0.4% | 4,873.41 | 12,624.2 | 2,291.7/sq mi (884.8/km$^2$) |
| Illinois | — | — | 12,812,508 | 12,830,632 | −0.1% | 55,499.0 | 143,742 | 230.9/sq mi (89.1/km$^2$) |