- South Windsor
- South Woodstock
- Southbury
- Southford
- Southington
- Southington
- Southport
- Southwood Acres
- Spectacle Island
- Spoonville
- Spring Glen
- Spring Hill
- Spring Village
- Springdale
- Sprite Island
- Stafford
- Stafford Springs
- Staffordville
- Stamford
- Stanwich
- Stepney
- Sterling
- Sterling City
- Stetson Corner
- Stevenson
- Stillmans Corner
- Stone Island
- Stonington
- Stony Creek
- Stony Island