Barrios de Massachusetts C
- Cambridge Highlands (36)
- Cambridgepark (7)
- Cambridgeport (203)
- Carlisle (9)
- Cedar Woods (3)
- Central Billerica (20)
- Central Hudson (14)
- Central Maverick Square-Paris St (6)
- Central Peabody (25)
- Central Square (29)
- Central Tewksbury (3)
- Centralville (36)
- Charlestown Navy Yard (3)
- Chemistry (1)
- Chestnut Hill Middlesex (30)
- Chestnut Hill Norfolk (21)
- Chinatown (65)
- Cleghorn (10)
- Cleveland Circle (103)
- Codman Square-East Codman Hill (41)
- Columbia Point (2)
- Columbus Park-Worcester (8)
- Commonwealth (7)
- Conway Park (131)
- Coolidge Corner (1074)
- Cottage Hill (4)
- Crescent Beach (39)
- Crockerville (3)
- Cummingsville (9)
- Cushing Square (34)