Template:Largest cities of Illinois
From Infogalactic: the planetary knowledge core
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| Rank | Name | County | Pop. | ||||||
 Chicago  Aurora |
1 | Chicago | Cook | 2,722,389 |  Rockford  Joliet |
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| 2 | Aurora | Kane | 200,456 | ||||||
| 3 | Rockford | Winnebago | 149,123 | ||||||
| 4 | Joliet | Will | 147,928 | ||||||
| 5 | Naperville | DuPage | 146,128 | ||||||
| 6 | Springfield | Sangamon | 116,809 | ||||||
| 7 | Peoria | Peoria | 115,828 | ||||||
| 8 | Elgin | Kane | 111,117 | ||||||
| 9 | Waukegan | Lake | 88,915 | ||||||
| 10 | Champaign | Champaign | 84,513 | ||||||
