Identifiers: city · town · village
| Rank | Community | Population |
|---|---|---|
| 1 | Chicago (city), IL | 2,746,388 |
| 2 | Cicero (town), IL | 85,268 |
| 3 | Orland Park (village), IL | 58,703 |
| 4 | Oak Lawn (village), IL | 58,362 |
| 5 | Berwyn (city), IL | 57,250 |
| 6 | Tinley Park (village), IL | 55,971 |
| 7 | Oak Park (village), IL | 54,583 |
| 8 | Downers Grove (village), IL | 50,247 |
| 9 | Elmhurst (city), IL | 45,786 |
| 10 | Calumet City (city), IL | 36,033 |
| 11 | Woodridge (village), IL | 34,158 |
| 12 | Burbank (city), IL | 29,439 |
| 13 | Lansing (village), IL | 29,076 |
| 14 | Chicago Heights (city), IL | 27,480 |
| 15 | Oak Forest (city), IL | 27,478 |
| 16 | Westmont (village), IL | 24,429 |
| 17 | Maywood (village), IL | 23,512 |
| 18 | Blue Island (city), IL | 22,558 |
| 19 | Villa Park (village), IL | 22,263 |
| 20 | Darien (city), IL | 22,011 |