Identifiers: city · village
| Rank | Community | Population |
|---|---|---|
| 1 | Aurora (city), IL | 180,542 |
| 2 | Naperville (city), IL | 149,540 |
| 3 | Bolingbrook (village), IL | 73,922 |
| 4 | Wheaton (city), IL | 53,970 |
| 5 | Plainfield (village), IL | 44,762 |
| 6 | Romeoville (village), IL | 39,863 |
| 7 | Oswego (village), IL | 34,585 |
| 8 | Woodridge (village), IL | 34,158 |
| 9 | Batavia (city), IL | 26,098 |
| 10 | West Chicago (city), IL | 25,614 |
| 11 | Lisle (village), IL | 24,223 |
| 12 | Darien (city), IL | 22,011 |
| 13 | Yorkville (city), IL | 21,533 |
| 14 | Geneva (city), IL | 21,393 |
| 15 | Montgomery (village), IL | 20,262 |
| 16 | North Aurora (village), IL | 18,261 |
| 17 | Shorewood (village), IL | 18,186 |
| 18 | Warrenville (city), IL | 13,553 |
| 19 | Minooka (village), IL | 12,758 |
| 20 | Plano (city), IL | 11,847 |
Identifiers: city · village
| Rank | Community | Population |
|---|---|---|
| 1 | Aurora (city), IL | 180,542 |
| 2 | Joliet (city), IL | 150,362 |
| 3 | Naperville (city), IL | 149,540 |
| 4 | Bolingbrook (village), IL | 73,922 |
| 5 | Wheaton (city), IL | 53,970 |
| 6 | Plainfield (village), IL | 44,762 |
| 7 | Romeoville (village), IL | 39,863 |
| 8 | Oswego (village), IL | 34,585 |
| 9 | Woodridge (village), IL | 34,158 |
| 10 | Batavia (city), IL | 26,098 |
| 11 | West Chicago (city), IL | 25,614 |
| 12 | Lisle (village), IL | 24,223 |
| 13 | Darien (city), IL | 22,011 |
| 14 | Yorkville (city), IL | 21,533 |
| 15 | Geneva (city), IL | 21,393 |
| 16 | Montgomery (village), IL | 20,262 |
| 17 | North Aurora (village), IL | 18,261 |
| 18 | Shorewood (village), IL | 18,186 |
| 19 | Warrenville (city), IL | 13,553 |
| 20 | Minooka (village), IL | 12,758 |