- Capital: Boston
- Population: 6 million
Stadiums – North America – United States – Massachusetts
| Location | Stadium | Capacity | Main use |
| Foxborough | Gillette Stadium | 64,000 | American football, football |
| Chestnut Hill | Alumni Stadium | 44,000 | American football |
| Boston | Fenway Park | 37,000 | Baseball |
| Boston | Harvard Stadium | 30,000 | American football |
| Boston | TD Garden | 18,000 | Basketball, ice hockey |