Identifiers: city · village
| Rank | Community | Population |
|---|---|---|
| 1 | Joliet (city), IL | 150,362 |
| 2 | Bolingbrook (village), IL | 73,922 |
| 3 | Orland Park (village), IL | 58,703 |
| 4 | Oak Lawn (village), IL | 58,362 |
| 5 | Tinley Park (village), IL | 55,971 |
| 6 | Romeoville (village), IL | 39,863 |
| 7 | Calumet City (city), IL | 36,033 |
| 8 | Woodridge (village), IL | 34,158 |
| 9 | Burbank (city), IL | 29,439 |
| 10 | Lansing (village), IL | 29,076 |
| 11 | Chicago Heights (city), IL | 27,480 |
| 12 | Oak Forest (city), IL | 27,478 |
| 13 | New Lenox (village), IL | 27,214 |
| 14 | Lockport (city), IL | 26,094 |
| 15 | Homer Glen (village), IL | 24,543 |
| 16 | Blue Island (city), IL | 22,558 |
| 17 | Darien (city), IL | 22,011 |
| 18 | Park Forest (village), IL | 21,687 |
| 19 | South Holland (village), IL | 21,465 |
| 20 | Dolton (village), IL | 21,426 |