- Snow Rock
- Somerset
- Somerville
- Soules Island
- South Acton
- South Amherst
- South Ashburnham
- South Ashfield
- South Athol
- South Attleboro
- South Barre
- South Bellingham
- South Berlin
- South Billerica
- South Bolton
- South Braintree
- South Brewster
- South Bridgewater
- South Byfield
- South Carver
- South Charlton
- South Chatham
- South Chelmsford
- South Dartmouth
- South Deerfield
- South Dennis
- South Duxbury
- South Egremont
- South End
- South End