- Speaking ROCK
- Steep Brook
- Suburban Park
- Summit Grove
- Sunk Rock
- Swansea Center
- Sarson Island
- Skiffs Island (historical)
- Slates Island
- South Rock
- Squibnocket
- South Gooseberry Island
- South Salem
- Saddle Rock
- Salem Neck
- Salisbury Beach
- Salisbury Plains
- Salisbury Point
- Salt Island
- Salt Island Ledge
- Salt Rock
- Sammy Rock
- Sandy Bay Ledge
- Satan Rock
- Saturday Night Ledge
- Sauli Rock
- Searle Rock
- Sellman Berth
- Shawsheen Heights
- South Byfield