- Slatersville
- Slocum
- Smithfield
- Snake Island
- Snug Harbor
- Social
- Sockanosset
- South Ferry
- South Foster
- South Hopkinton
- South Kingstown
- South Portsmouth
- Spar Island
- Spectacle Island
- Spencers Corner
- Spragueville
- Spring Green
- Spring Grove
- Spring Lake
- Squantum
- Star Island
- Starve Goat Island (historical)
- Stevens Island
- Stillmanville
- Stillwater
- Stony Reef
- Summit
- Sunshine Island (historical)