- Seaside
- Seaview Beach
- Sedge Island
- Sellecks Corners
- Seymour
- Shady Rest
- Shailerville
- Shaker Pines
- Sharon
- Sharon Valley
- Shea Island
- Sheep Rocks
- Sheffield Island
- Shelton
- Sherman
- Sherman Corner
- Sherwood Island
- Sherwood Manor
- Shewville
- Shippan Point
- Shore Island
- Shore Rock
- Shorehaven
- Short Beach
- Silver Beach
- Silver Falls
- Silvermine
- Silvermine Acres
- Simsbury
- Simsbury Center