162 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Chicago | 1 | 2,648,036 | 2,743,329 | -0.31% | 11,764 | 225 | City |
| Chicago | 2 | 2,611,867 | 2,743,329 | -1% | 11,468 | 228 | City |
| Wheeling | 3 | 149,248 | 157,097 | -0.62% | 4,157 | 36 | Township |
| Thornton | 4 | 148,124 | 157,255 | -0.8% | 3,158 | 47 | Township |
| Worth | 5 | 143,805 | 152,340 | -0.77% | 4,520 | 32 | Township |
| Proviso | 6 | 143,328 | 150,608 | -0.57% | 4,823 | 30 | Township |
| Maine | 7 | 132,250 | 140,053 | -0.78% | 5,104 | 26 | Township |
| Schaumburg | 8 | 127,866 | 134,391 | -0.58% | 4,160 | 31 | Township |
| Lyons | 9 | 109,193 | 114,729 | -0.63% | 3,003 | 36 | Township |
| Palatine | 10 | 107,924 | 114,009 | -0.73% | 3,023 | 36 | Township |
| Niles | 11 | 106,089 | 112,103 | -0.68% | 4,991 | 21 | Township |
| Bremen | 12 | 100,917 | 106,730 | -0.74% | 2,674 | 38 | Township |
| Orland | 13 | 93,803 | 97,950 | -0.59% | 2,630 | 36 | Township |
| Elk Grove | 14 | 90,100 | 95,187 | -0.74% | 3,269 | 28 | Township |
| Leyden | 15 | 87,756 | 92,760 | -0.82% | 4,405 | 20 | Township |
| Northfield | 16 | 87,245 | 91,256 | -0.51% | 2,545 | 34 | Township |
| Bloom | 17 | 81,288 | 85,705 | -0.66% | 1,752 | 46 | Township |
| Cicero | 18 | 79,536 | 84,896 | -0.91% | 13,561 | 6 | Township |
| Cicero | 19 | 78,409 | 84,896 | -1.63% | 13,369 | 6 | Town |
| Evanston | 20 | 74,472 | 77,814 | -0.4% | 9,573 | 8 | City |
| Schaumburg | 21 | 73,970 | 78,419 | -1.19% | 3,824 | 19 | Village |
| Evanston | 22 | 73,240 | 77,814 | -1.23% | 9,415 | 8 | City |
| Arlington Heights | 23 | 72,545 | 77,420 | -1.33% | 4,367 | 17 | Village |
| Rich | 24 | 71,921 | 75,881 | -0.7% | 1,977 | 36 | Township |
| Skokie | 25 | 63,105 | 67,685 | -1.43% | 6,270 | 10 | Village |
| Palatine | 26 | 62,996 | 67,678 | -1.46% | 4,463 | 14 | Village |
| Des Plaines | 27 | 56,380 | 60,455 | -1.42% | 3,960 | 14 | City |
| Orland Park | 28 | 56,094 | 58,543 | -0.87% | 2,546 | 22 | Village |
| New Trier | 29 | 54,577 | 57,178 | -0.55% | 3,433 | 16 | Township |
| Oak Lawn | 30 | 54,125 | 58,147 | -1.46% | 6,315 | 9 | Village |
| Palos | 31 | 53,909 | 56,648 | -0.59% | 1,598 | 34 | Township |
| Berwyn | 32 | 53,440 | 56,993 | -0.9% | 13,689 | 4 | Township |
| Mount Prospect | 33 | 52,701 | 56,693 | -1.49% | 4,917 | 11 | Village |
| Berwyn | 34 | 52,694 | 56,993 | -1.61% | 13,497 | 4 | City |
| Tinley Park | 35 | 52,594 | 55,824 | -1.21% | 3,253 | 16 | Village |
| Oak Park | 36 | 51,303 | 54,372 | -0.73% | 10,916 | 5 | Township |
| Oak Park | 37 | 50,510 | 54,372 | -1.51% | 10,747 | 5 | Village |
| Hoffman Estates | 38 | 48,711 | 52,380 | -1.48% | 2,363 | 21 | Village |
| Glenview | 39 | 45,811 | 48,543 | -1.18% | 3,166 | 14 | Village |
| Stickney | 40 | 39,121 | 41,366 | -0.74% | 3,135 | 12 | Township |
| Park Ridge | 41 | 36,830 | 39,497 | -1.43% | 5,196 | 7 | City |
| Wheeling | 42 | 36,751 | 39,185 | -1.31% | 4,238 | 9 | Village |
| Streamwood | 43 | 36,678 | 39,432 | -1.48% | 4,697 | 8 | Village |
| Hanover Park | 44 | 35,376 | 37,348 | -1.1% | 5,509 | 6 | Village |
| Calumet City | 45 | 33,328 | 35,902 | -1.52% | 4,630 | 7 | City |
| Northbrook | 46 | 33,225 | 35,105 | -1.12% | 2,509 | 13 | Village |
| Elk Grove Village | 47 | 30,449 | 32,701 | -1.46% | 2,633 | 12 | Village |
| Niles | 48 | 28,661 | 30,791 | -1.46% | 4,901 | 6 | Village |
| Burbank | 49 | 27,382 | 29,337 | -1.41% | 6,566 | 4 | City |
| Lansing | 50 | 26,880 | 28,962 | -1.52% | 3,602 | 7 | Village |
| Wilmette | 51 | 26,326 | 28,075 | -1.31% | 4,874 | 5 | Village |
| Norwood Park | 52 | 25,780 | 27,332 | -0.84% | 7,036 | 4 | Township |
| Oak Forest | 53 | 25,424 | 27,361 | -1.5% | 4,220 | 6 | City |
| Chicago Heights | 54 | 25,397 | 27,364 | -1.52% | 2,470 | 10 | City |
| Morton Grove | 55 | 23,412 | 25,209 | -1.51% | 4,601 | 5 | Village |
| Melrose Park | 56 | 22,968 | 24,713 | -1.5% | 5,276 | 4 | Village |
| Rolling Meadows | 57 | 22,814 | 24,101 | -1.11% | 4,062 | 6 | City |
| Elmwood Park | 58 | 22,666 | 24,423 | -1.52% | 11,879 | 2 | Village |
| Maywood | 59 | 22,526 | 23,410 | -0.78% | 8,291 | 3 | Village |
| Lemont | 60 | 22,113 | 22,641 | -0.3% | 1,086 | 20 | Township |
| Blue Island | 61 | 20,844 | 22,468 | -1.54% | 5,120 | 4 | City |
| Park Forest | 62 | 20,195 | 21,614 | -1.39% | 4,071 | 5 | Village |
| South Holland | 63 | 19,884 | 21,381 | -1.48% | 2,748 | 7 | Village |
| Dolton | 64 | 19,797 | 21,329 | -1.52% | 4,331 | 5 | Village |
| Harvey | 65 | 18,827 | 20,251 | -1.49% | 3,034 | 6 | City |
| Evergreen Park | 66 | 18,441 | 19,863 | -1.52% | 5,830 | 3 | Village |
| Brookfield | 67 | 18,054 | 19,396 | -1.46% | 5,892 | 3 | Village |
| Homewood | 68 | 17,981 | 19,378 | -1.53% | 3,447 | 5 | Village |
| Matteson | 69 | 17,810 | 19,017 | -1.34% | 1,918 | 9 | Village |
| Alsip | 70 | 17,668 | 18,993 | -1.48% | 2,706 | 7 | Village |
| Franklin Park | 71 | 17,519 | 18,399 | -0.99% | 3,667 | 5 | Village |
| Lemont | 72 | 17,437 | 17,782 | -0.39% | 2,058 | 8 | Village |
| Calumet | 73 | 17,422 | 18,530 | -0.84% | 3,950 | 4 | Township |
| Bellwood | 74 | 17,339 | 18,716 | -1.56% | 7,231 | 2 | Village |
| Palos Hills | 75 | 17,292 | 18,459 | -1.33% | 4,073 | 4 | City |
| Bridgeview | 76 | 15,891 | 16,973 | -1.34% | 3,845 | 4 | Village |
| Westchester | 77 | 15,603 | 16,830 | -1.55% | 4,233 | 4 | Village |
| Riverside | 78 | 15,595 | 16,595 | -0.85% | 3,874 | 4 | Township |
| Country Club Hills | 79 | 15,547 | 16,712 | -1.48% | 3,128 | 5 | City |
| La Grange | 80 | 15,265 | 16,269 | -1.3% | 6,046 | 3 | Village |
| Prospect Heights | 81 | 14,897 | 15,989 | -1.44% | 3,541 | 4 | City |
| Norridge | 82 | 14,230 | 15,204 | -1.35% | 7,871 | 2 | Village |
| Hickory Hills | 83 | 13,502 | 14,456 | -1.39% | 4,748 | 3 | City |
| Chicago Ridge | 84 | 13,472 | 14,377 | -1.33% | 5,940 | 2 | Village |
| Midlothian | 85 | 13,283 | 14,262 | -1.45% | 4,712 | 3 | Village |
| Forest Park | 86 | 13,248 | 14,278 | -1.53% | 5,515 | 2 | Village |
| Western Springs | 87 | 13,088 | 13,592 | -0.77% | 4,699 | 3 | Village |
| La Grange Park | 88 | 12,730 | 13,432 | -1.09% | 5,701 | 2 | Village |
| Lincolnwood | 89 | 12,512 | 13,411 | -1.42% | 4,648 | 3 | Village |
| Hazel Crest | 90 | 12,394 | 13,336 | -1.49% | 3,649 | 3 | Village |
| Richton Park | 91 | 12,046 | 12,736 | -1.13% | 2,743 | 4 | Village |
| Winnetka | 92 | 12,020 | 12,700 | -1.12% | 3,154 | 4 | Village |
| Northlake | 93 | 11,920 | 12,794 | -1.45% | 3,753 | 3 | City |
| Justice | 94 | 11,759 | 12,563 | -1.35% | 4,140 | 3 | Village |
| Palos Heights | 95 | 11,182 | 12,014 | -1.46% | 2,963 | 4 | City |
| River Forest | 96 | 11,061 | 11,679 | -0.74% | 4,460 | 2 | Township |
| River Forest | 97 | 10,925 | 11,679 | -1.36% | 4,405 | 2 | Village |
| Burr Ridge | 98 | 10,917 | 11,181 | -0.48% | 1,461 | 7 | Village |
| Schiller Park | 99 | 10,830 | 11,665 | -1.52% | 3,910 | 3 | Village |
| Markham | 100 | 10,801 | 11,620 | -1.5% | 1,998 | 5 | City |
| Summit | 101 | 10,284 | 11,114 | -1.59% | 4,853 | 2 | Village |
| Worth | 102 | 10,202 | 10,931 | -1.41% | 4,306 | 2 | Village |
| Crestwood | 103 | 10,123 | 10,783 | -1.29% | 3,320 | 3 | Village |
| River Grove | 104 | 10,086 | 10,575 | -0.96% | 4,218 | 2 | Village |
| Lyons | 105 | 9,989 | 10,776 | -1.55% | 4,526 | 2 | Village |
| Riverdale | 106 | 9,849 | 10,623 | -1.55% | 2,755 | 4 | Village |
| Frankfort Square | 107 | 9,390 | 8,831 | 0.09% | 3,762 | 2 | CDP |
| Sauk Village | 108 | 9,221 | 9,895 | -1.44% | 2,310 | 4 | Village |
| Steger | 109 | 9,093 | 9,567 | -1.03% | 2,671 | 3 | Village |
| Flossmoor | 110 | 8,978 | 9,662 | -1.5% | 2,452 | 4 | Village |
| Lynwood | 111 | 8,978 | 9,095 | -0.26% | 1,766 | 5 | Village |
| Worth | 112 | 8,934 | 8,864 | 0.35% | 247 | 36 | Township |
| Riverside | 113 | 8,565 | 9,264 | -1.61% | 4,330 | 2 | Village |
| Glencoe | 114 | 8,400 | 8,825 | -1% | 2,259 | 4 | Village |
| Harwood Heights | 115 | 8,368 | 9,028 | -1.55% | 10,143 | 1 | Village |
| Glenwood | 116 | 8,024 | 8,634 | -1.5% | 2,458 | 3 | Village |
| Hillside | 117 | 7,685 | 8,280 | -1.52% | 2,426 | 3 | Village |
| Broadview | 118 | 7,628 | 7,962 | -0.87% | 4,293 | 2 | Village |
| Inverness | 119 | 7,115 | 7,582 | -1.29% | 1,089 | 7 | Village |
| North Riverside | 120 | 6,853 | 7,397 | -1.57% | 4,168 | 2 | Village |
| Stickney | 121 | 6,613 | 7,087 | -1.42% | 3,437 | 2 | Village |
| Calumet Park | 122 | 6,480 | 6,992 | -1.55% | 5,801 | 1 | Village |
| Orland Hills | 123 | 6,388 | 6,863 | -1.47% | 5,579 | 1 | Village |
| Countryside | 124 | 5,975 | 6,404 | -1.42% | 2,076 | 3 | City |
| Willow Springs | 125 | 5,587 | 5,839 | -0.89% | 1,347 | 4 | Village |
| Northfield | 126 | 5,407 | 5,746 | -1.24% | 1,674 | 3 | Village |
| Posen | 127 | 5,176 | 5,570 | -1.5% | 4,428 | 1 | Village |
| Lake Barrington | 128 | 5,094 | 5,089 | 0.02% | 888 | 6 | Village |
| Berkeley | 129 | 4,935 | 5,319 | -1.54% | 3,520 | 1 | Village |
| South Barrington | 130 | 4,913 | 5,065 | -0.61% | 659 | 7 | Village |
| Palos Park | 131 | 4,673 | 4,902 | -0.97% | 725 | 6 | Village |
| Robbins | 132 | 4,411 | 4,616 | -0.92% | 3,044 | 1 | Village |
| Olympia Fields | 133 | 4,410 | 4,709 | -1.34% | 1,501 | 3 | Village |
| Stone Park | 134 | 4,294 | 4,564 | -1.24% | 12,483 | 0 | Village |
| Hometown | 135 | 4,010 | 4,330 | -1.57% | 8,372 | 0 | City |
| Barrington Hills | 136 | 3,966 | 4,095 | -0.65% | 147 | 27 | Village |
| Indian Head Park | 137 | 3,796 | 4,056 | -1.35% | 4,073 | 1 | Village |
| Burnham | 138 | 3,759 | 4,033 | -1.44% | 2,026 | 2 | Village |
| South Chicago Heights | 139 | 3,721 | 4,006 | -1.51% | 2,354 | 2 | Village |
| Riverwoods | 140 | 3,702 | 3,789 | -0.46% | 933 | 4 | Village |
| Rosemont | 141 | 3,650 | 3,939 | -1.56% | 2,037 | 2 | Village |
| Deer Park | 142 | 3,592 | 3,682 | -0.5% | 979 | 4 | Village |
| North Barrington | 143 | 3,085 | 3,135 | -0.32% | 653 | 5 | Village |
| East Dundee | 144 | 3,073 | 3,177 | -0.68% | 1,050 | 3 | Village |
| Dixmoor | 145 | 2,825 | 3,000 | -1.22% | 2,262 | 1 | Village |
| Oakbrook Terrace | 146 | 2,653 | 2,745 | -0.67% | 2,028 | 1 | City |
| Kenilworth | 147 | 2,333 | 2,503 | -1.44% | 3,843 | 1 | Village |
| Thornton | 148 | 2,203 | 2,377 | -1.56% | 928 | 2 | Village |
| Riverside | 149 | 2,039 | 2,093 | -0.24% | 117 | 17 | Township |
| Merrionette Park | 150 | 1,835 | 1,962 | -1.34% | 4,893 | 0 | Village |
| Ford Heights | 151 | 1,678 | 1,810 | -1.53% | 862 | 2 | Village |
| Phoenix | 152 | 1,577 | 1,702 | -1.56% | 3,399 | 0 | Village |
| Port Barrington | 153 | 1,555 | 1,584 | -0.38% | 1,341 | 1 | Village |
| Hodgkins | 154 | 1,442 | 1,496 | -0.76% | 532 | 3 | Village |
| East Hazel Crest | 155 | 1,194 | 1,288 | -1.57% | 1,523 | 1 | Village |
| Tower Lakes | 156 | 1,185 | 1,222 | -0.59% | 1,289 | 1 | Village |
| Brookfield | 157 | 1,062 | 1,062 | 0.38% | 24 | 44 | Township |
| Bannockburn | 158 | 1,000 | 1,012 | -0.2% | 493 | 2 | Village |
| Forest View | 159 | 732 | 791 | -1.61% | 627 | 1 | Village |
| Bedford Park | 160 | 573 | 595 | -0.69% | 97 | 6 | Village |
| Golf | 161 | 487 | 511 | -1.02% | 1,087 | 0 | Village |
| McCook | 162 | 229 | 249 | -1.72% | 88 | 3 | Village |
Chicago is the largest city in Cook County, with a population of 2,648,036.
McCook is the smallest city in Cook County, with a population of 229.
There are 162 cities in Cook County, Illinois.