- Salt Rock
- Sandy Hammock
- Sanfordtown
- Saugatuck
- Saugatuck Shores
- Saw Island
- Schoonhoven Park
- Sellecks Corners
- Shady Rest
- Shea Island
- Sheep Rocks
- Sheffield Island
- Sherwood Island
- Shippan Point
- Shore Island
- Shorehaven
- Silvermine
- Snug Harbor
- South End
- South Norwalk
- South Wilton
- Springdale
- Sprite Island
- Stanwich
- Stepney
- Stratfield
- Sunnyside
- Sunnyside Trailer Park
- Scantic
- Scitico