Identifiers: city · village
| Rank | Community | Population |
|---|---|---|
| 1 | Elgin (city), IL | 114,797 |
| 2 | Schaumburg (village), IL | 78,723 |
| 3 | Arlington Heights (village), IL | 77,676 |
| 4 | Palatine (village), IL | 67,908 |
| 5 | Des Plaines (city), IL | 60,675 |
| 6 | Mount Prospect (village), IL | 56,852 |
| 7 | Wheaton (city), IL | 53,970 |
| 8 | Hoffman Estates (village), IL | 52,530 |
| 9 | Elmhurst (city), IL | 45,786 |
| 10 | Lombard (village), IL | 44,476 |
| 11 | Buffalo Grove (village), IL | 43,212 |
| 12 | Bartlett (village), IL | 41,105 |
| 13 | Crystal Lake (city), IL | 40,269 |
| 14 | Carol Stream (village), IL | 39,854 |
| 15 | Park Ridge (city), IL | 39,656 |
| 16 | Streamwood (village), IL | 39,577 |
| 17 | Wheeling (village), IL | 39,137 |
| 18 | Carpentersville (village), IL | 37,983 |
| 19 | Hanover Park (village), IL | 37,470 |
| 20 | Addison (village), IL | 35,702 |
Identifiers: city · village
| Rank | Community | Population |
|---|---|---|
| 1 | Elgin (city), IL | 114,797 |
| 2 | Schaumburg (village), IL | 78,723 |
| 3 | Arlington Heights (village), IL | 77,676 |
| 4 | Palatine (village), IL | 67,908 |
| 5 | Des Plaines (city), IL | 60,675 |
| 6 | Mount Prospect (village), IL | 56,852 |
| 7 | Wheaton (city), IL | 53,970 |
| 8 | Hoffman Estates (village), IL | 52,530 |
| 9 | Elmhurst (city), IL | 45,786 |
| 10 | Lombard (village), IL | 44,476 |
| 11 | Buffalo Grove (village), IL | 43,212 |
| 12 | Bartlett (village), IL | 41,105 |
| 13 | Carol Stream (village), IL | 39,854 |
| 14 | Park Ridge (city), IL | 39,656 |
| 15 | Streamwood (village), IL | 39,577 |
| 16 | Wheeling (village), IL | 39,137 |
| 17 | Carpentersville (village), IL | 37,983 |
| 18 | Hanover Park (village), IL | 37,470 |
| 19 | Addison (village), IL | 35,702 |
| 20 | Glendale Heights (village), IL | 33,176 |