- Shiloh
- Shy Corner
- Skillings Corner
- South Durham
- South Leeds
- South Lewiston
- South Livermore
- South Poland
- South Turner
- South West Bend
- Sprague Mill
- Stevens Mill
- Stricklands
- South Bancroft
- Saint Clair Island
- Sand Island
- Savage Island
- Sawyer Corner
- Scopan
- Selden
- Septiemel Island
- Seven Islands
- Seven Islands
- Sharp
- Shorey
- Silver Ridge
- Sinclair
- Sixmile Island
- Skerry
- Smyrna Center