| Rank | City | 2009 Population (Est.) | Growth Rate (Annual) |
|---|---|---|---|
| 1 | Chicago | 2,830,026 | -0.3% |
| 2 | Aurora | 170,765 | 2.1% |
| 3 | Rockford | 157,266 | 0.4% |
| 4 | Joliet | 145,793 | 3.8% |
| 5 | Naperville | 142,489 | 1.2% |
| 6 | Springfield | 117,456 | 0.6% |
| 7 | Peoria | 114,200 | 0.1% |
| 8 | Elgin | 105,491 | 1.3% |
| 9 | Waukegan | 90,154 | 0.3% |
| 10 | Cicero | 79,846 | -0.8% |
| 11 | Champaign | 79,341 | 1.5% |
| 12 | Evanston | 77,102 | 0.5% |
| 13 | Decatur | 76,276 | -0.9% |
| 14 | Bloomington | 73,199 | 1.4% |
| 15 | Arlington Heights | 72,738 | -0.6% |
| 16 | Schaumburg | 71,037 | -0.7% |
| 17 | Bolingbrook | 70,723 | 2.7% |
| 18 | Skokie | 66,578 | 0.6% |
| 19 | Palatine | 66,424 | 0.0% |
| 20 | Tinley Park | 59,124 | 2.3% |
| 21 | Des Plaines | 56,596 | -0.1% |
| 22 | Orland Park | 54,936 | 0.8% |
| 23 | Wheaton | 54,324 | -0.3% |
| 24 | Hoffman Estates | 53,583 | 0.9% |
| 25 | Oak Park | 53,187 | 0.2% |
| 26 | Mount Prospect | 52,890 | -0.8% |
| 27 | Oak Lawn | 52,789 | -0.6% |
| 28 | Normal | 52,056 | 1.7% |
| 29 | Berwyn | 49,584 | -1.1% |
| 30 | Downers Grove | 48,834 | -0.2% |
| 31 | Elmhurst | 46,033 | 0.8% |
| 32 | Glenview | 45,750 | 0.7% |
| 33 | DeKalb | 45,444 | 1.9% |
| 34 | Moline | 43,020 | -0.3% |
| 35 | Lombard | 42,649 | 0.0% |
| 36 | Buffalo Grove | 42,620 | -0.2% |
| 37 | Bartlett | 41,911 | 1.6% |
| 38 | Crystal Lake | 41,759 | 1.1% |
| 39 | Belleville | 41,157 | -0.4% |
| 40 | Quincy | 39,919 | -0.2% |
| 41 | Carol Stream | 39,867 | -0.2% |
| 42 | Urbana | 39,513 | 0.5% |
| 43 | Rock Island | 38,081 | -0.5% |
| 44 | Romeoville | 37,984 | 7.0% |
| 45 | Carpentersville | 37,440 | 2.3% |
| 46 | Streamwood | 36,760 | 0.0% |
| 47 | Addison | 36,751 | 0.1% |
| 48 | Park Ridge | 36,628 | -0.4% |
| 49 | Hanover Park | 36,570 | -0.6% |
| 50 | Calumet City | 36,522 | -0.8% |
| 51 | Plainfield | 36,234 | 12.9% |
| 52 | Wheeling | 35,752 | -0.2% |
| 53 | Woodridge | 33,994 | 1.1% |
| 54 | Northbrook | 33,616 | 0.0% |
| 55 | Pekin | 33,462 | -0.2% |
| 56 | Mundelein | 33,431 | 0.9% |
| 57 | Elk Grove Village | 33,019 | -0.6% |
| 58 | St. Charles | 32,817 | 1.9% |
| 59 | Danville | 32,628 | -0.7% |
| 60 | North Chicago | 32,539 | -1.2% |
| 61 | Glendale Heights | 31,746 | -0.1% |
| 62 | Highland Park | 31,231 | 0.4% |
| 63 | Galesburg | 31,130 | -1.0% |
| 64 | Granite City | 30,674 | -0.5% |
| 65 | Gurnee | 30,378 | 0.6% |
| 66 | Chicago Heights | 30,349 | -1.0% |
| 67 | Algonquin | 30,310 | 3.4% |
| 68 | Lake in the Hills | 29,668 | 2.6% |
| 69 | Alton | 29,349 | -0.5% |
| 70 | Oswego | 28,950 | 9.6% |
| 71 | East St. Louis | 28,718 | -1.2% |
| 72 | Niles | 28,426 | -0.7% |
| 73 | Harvey | 27,865 | -0.9% |
| 74 | Round Lake Beach | 27,639 | 0.7% |
| 75 | Oak Forest | 27,589 | -0.3% |
| 76 | O'Fallon | 27,515 | 2.7% |
| 77 | Batavia | 27,312 | 1.4% |
| 78 | Burbank | 27,309 | -0.3% |
| 79 | Glen Ellyn | 27,077 | -0.1% |
| 80 | Kankakee | 26,778 | -0.4% |
| 81 | McHenry | 26,762 | 2.6% |
| 82 | Lansing | 26,442 | -0.8% |
| 83 | Belvidere | 26,413 | 2.8% |
| 84 | West Chicago | 26,350 | 1.2% |
| 85 | Wilmette | 26,212 | -0.6% |
| 86 | Homer Glen | 26,112 | 1.9% |
| 87 | Carbondale | 26,041 | -0.1% |
| 88 | Collinsville | 25,929 | 0.5% |
| 89 | Zion | 24,958 | 1.0% |
| 90 | Westmont | 24,882 | -0.0% |
| 91 | Maywood | 24,856 | -1.0% |
| 92 | Freeport | 24,743 | -0.8% |
| 93 | Lockport | 24,651 | 5.8% |
| 94 | Edwardsville | 24,420 | 1.1% |
| 95 | Loves Park | 24,372 | 2.3% |
| 96 | Vernon Hills | 24,226 | 2.2% |
| 97 | New Lenox | 24,124 | 3.5% |
| 98 | Geneva | 24,062 | 2.5% |
| 99 | Woodstock | 23,874 | 2.0% |
| 100 | Elmwood Park | 23,856 | -0.8% |
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