| Rank | City | 2020 Population (Est.) | Growth Rate (Annual) |
|---|---|---|---|
| 1 | Chicago | 2,693,976 | -0.0% |
| 2 | Aurora | 197,757 | -0.0% |
| 3 | Naperville | 148,449 | 0.5% |
| 4 | Joliet | 147,344 | -0.0% |
| 5 | Rockford | 145,609 | -0.5% |
| 6 | Springfield | 114,230 | -0.2% |
| 7 | Elgin | 110,849 | 0.3% |
| 8 | Peoria | 110,417 | -0.5% |
| 9 | Champaign | 88,909 | 1.0% |
| 10 | Waukegan | 86,075 | -0.4% |
| 11 | Cicero | 80,796 | -0.4% |
| 12 | Bloomington | 77,330 | 0.1% |
| 13 | Arlington Heights | 74,760 | -0.1% |
| 14 | Bolingbrook | 74,545 | 0.2% |
| 15 | Evanston | 73,473 | -0.2% |
| 16 | Schaumburg | 72,887 | -0.2% |
| 17 | Decatur | 70,746 | -0.8% |
| 18 | Palatine | 67,482 | -0.2% |
| 19 | Skokie | 62,700 | -0.4% |
| 20 | Des Plaines | 58,899 | 0.1% |
| 21 | Orland Park | 57,857 | 0.2% |
| 22 | Tinley Park | 55,773 | -0.2% |
| 23 | Oak Lawn | 55,022 | -0.3% |
| 24 | Normal | 54,469 | 0.4% |
| 25 | Berwyn | 54,391 | -0.5% |
| 26 | Mount Prospect | 53,719 | -0.1% |
| 27 | Wheaton | 52,745 | -0.0% |
| 28 | Oak Park | 52,381 | 0.1% |
| 29 | Hoffman Estates | 50,932 | -0.2% |
| 30 | Downers Grove | 49,057 | 0.3% |
| 31 | Glenview | 47,308 | 0.6% |
| 32 | Elmhurst | 46,746 | 0.6% |
| 33 | Plainfield | 44,308 | 1.3% |
| 34 | Lombard | 44,303 | 0.3% |
| 35 | DeKalb | 42,847 | -0.3% |
| 36 | Urbana | 42,214 | 0.3% |
| 37 | Moline | 41,356 | -0.6% |
| 38 | Belleville | 40,897 | -0.9% |
| 39 | Bartlett | 40,647 | -0.2% |
| 40 | Buffalo Grove | 40,494 | -0.3% |
| 41 | Quincy | 39,949 | -0.2% |
| 42 | Crystal Lake | 39,829 | -0.3% |
| 43 | Romeoville | 39,746 | 0.0% |
| 44 | Streamwood | 39,228 | -0.2% |
| 45 | Carol Stream | 39,203 | -0.1% |
| 46 | Wheeling | 38,646 | 0.3% |
| 47 | Hanover Park | 37,426 | -0.2% |
| 48 | Carpentersville | 37,254 | -0.1% |
| 49 | Rock Island | 37,176 | -0.5% |
| 50 | Park Ridge | 36,950 | -0.2% |
| 51 | Addison | 36,482 | -0.1% |
| 52 | Oswego | 36,252 | 2.0% |
| 53 | Calumet City | 35,913 | -0.3% |
| 54 | Glendale Heights | 33,617 | -0.2% |
| 55 | Woodridge | 33,432 | 0.2% |
| 56 | Northbrook | 32,958 | -0.1% |
| 57 | St. Charles | 32,887 | -0.0% |
| 58 | Elk Grove Village | 32,400 | -0.2% |
| 59 | Pekin | 32,045 | -0.7% |
| 60 | Mundelein | 31,051 | -0.0% |
| 61 | Algonquin | 30,897 | 0.3% |
| 62 | Danville | 30,479 | -0.9% |
| 63 | Gurnee | 30,378 | -0.3% |
| 64 | Galesburg | 30,197 | -0.7% |
| 65 | North Chicago | 29,615 | -1.1% |
| 66 | O'Fallon | 29,583 | 0.5% |
| 67 | Highland Park | 29,515 | -0.1% |
| 68 | Chicago Heights | 29,322 | -0.4% |
| 69 | Niles | 28,938 | -0.3% |
| 70 | Lake in the Hills | 28,634 | -0.1% |
| 71 | Burbank | 28,289 | -0.2% |
| 72 | Granite City | 28,158 | -0.6% |
| 73 | Glen Ellyn | 27,714 | 0.1% |
| 74 | Lansing | 27,402 | -0.4% |
| 75 | Huntley | 27,228 | 1.3% |
| 76 | Oak Forest | 27,173 | -0.3% |
| 77 | Round Lake Beach | 27,100 | -0.4% |
| 78 | Wilmette | 27,089 | 0.0% |
| 79 | McHenry | 27,061 | 0.0% |
| 80 | New Lenox | 26,926 | 1.1% |
| 81 | West Chicago | 26,816 | -0.1% |
| 82 | Vernon Hills | 26,521 | 0.6% |
| 83 | Batavia | 26,420 | 0.2% |
| 84 | Alton | 26,208 | -0.7% |
| 85 | East St. Louis | 26,047 | -0.4% |
| 86 | Kankakee | 26,024 | -0.6% |
| 87 | Lockport | 25,615 | 0.3% |
| 88 | Woodstock | 25,240 | 0.2% |
| 89 | Edwardsville | 25,233 | 0.4% |
| 90 | Belvidere | 25,143 | -0.2% |
| 91 | Carbondale | 25,083 | -0.4% |
| 92 | South Elgin | 24,755 | 1.3% |
| 93 | Melrose Park | 24,703 | -0.3% |
| 94 | Homer Glen | 24,472 | 0.1% |
| 95 | Westmont | 24,443 | -0.1% |
| 96 | Harvey | 24,408 | -0.4% |
| 97 | Collinsville | 24,395 | -0.5% |
| 98 | Elmwood Park | 24,098 | -0.4% |
| 99 | Freeport | 23,775 | -0.8% |
| 100 | Rolling Meadows | 23,532 | -0.3% |
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