- Capital: Springfield
- Population: 12 million
Stadiums – North America – United States – Illinois
| Location | Stadium | Capacity | Main use |
| Chicago | Soldier Field | 61,000 | American football, football |
| Champaign | Memorial Stadium | 60,000 | American football |
| Chicago | Guaranteed Rate Field | 40,000 | Baseball |
| DeKalb | Huskie Stadium | 24,000 | American football |
| Bridgeview | SeatGeek Stadium | 20,000 | Football, rugby union |
| Chicago | United Center | 20,000 | Basketball, ice hockey |
| Rosemont | Allstate Arena | 16,000 | Ice hockey |
| Normal | CEFCU Arena | 10,000 | Basketball, volleyball |
| Joliet | Joliet Memorial Stadium | 10,000 | American football, football |