Barrios de Massachusetts C
- Cambridge Highlands (47)
- Cambridgepark (10)
- Cambridgeport (418)
- Carlisle (2)
- Cedar Woods (5)
- Central Billerica (18)
- Central Hudson (9)
- Central Maverick Square-Paris St (4)
- Central Peabody (19)
- Central Square (48)
- Central Tewksbury (2)
- Centralville (14)
- Charlestown Navy Yard (4)
- Chemistry (2)
- Chestnut Hill Middlesex (30)
- Chestnut Hill Norfolk (31)
- Chinatown (124)
- Cleghorn (10)
- Cleveland Circle (187)
- Codman Square-East Codman Hill (87)
- Columbia Point (2)
- Columbus Park-Worcester (8)
- Commonwealth (18)
- Conway Park (420)
- Coolidge Corner (1450)
- Cottage Hill (5)
- Crescent Beach (102)
- Crockerville (3)
- Cummingsville (16)
- Cushing Square (37)