|
|
Rank
|
Name
|
County
|
Pop.
|
|
![Chicago](//upload.wikimedia.org/wikipedia/commons/thumb/8/82/Chicago_sunrise_1.jpg/120px-Chicago_sunrise_1.jpg) Chicago
![Aurora](//upload.wikimedia.org/wikipedia/commons/thumb/3/32/Aurora_Stolp_Island_Fox_R.JPG/120px-Aurora_Stolp_Island_Fox_R.JPG) Aurora
|
1 |
Chicago |
Cook |
2,695,598
|
![Rockford](//upload.wikimedia.org/wikipedia/commons/thumb/3/36/Rockford%2C_IL_Rockford_Register_Star_01.JPG/120px-Rockford%2C_IL_Rockford_Register_Star_01.JPG) Rockford
![Joliet](//upload.wikimedia.org/wikipedia/commons/thumb/d/d9/JTown.JPG/120px-JTown.JPG) Joliet
|
2 |
Aurora |
Kane |
197,899
|
3 |
Rockford |
Winnebago |
152,871
|
4 |
Joliet |
Will |
147,433
|
5 |
Naperville |
DuPage |
141,853
|
6 |
Springfield |
Sangamon |
116,250
|
7 |
Peoria |
Peoria |
115,007
|
8 |
Elgin |
Kane |
108,188
|
9 |
Waukegan |
Lake |
91,400
|
10 |
Cicero |
Cook |
83,891
|