Barrios de Massachusetts W
- Walnut Hill (12)
- Washington Park (239)
- Washington Square (598)
- Waterfront (50)
- Watertown West End (147)
- Waverly Square (49)
- Webster Square (16)
- Wellington Medford (92)
- Wellington-Harrington (362)
- West Cambridge (79)
- West Codman Hill-West Lower Mills (34)
- West Concord (6)
- West End (17)
- West End Boston (63)
- West End Waltham (27)
- West Everett (40)
- West Medford (94)
- West Peabody (4)
- West Quincy (17)
- West Revere (83)
- West Somerville (527)
- West Tatnuck (4)
- Western Fall River (17)
- Weymouth Landing (5)
- Winchester Highlands (3)
- Winchester Town Center (21)
- Winter Hill (242)
- Winthrop Beach (24)
- Winthrop Highlands (4)
- Wollaston (23)
- Woods Corner (3)
- Wyoming (20)