- Saint Charles
- Saint Francis
- Saint Johns Island (historical)
- Saint Lawrence
- Saint Onge
- Salem
- Sanator
- Sand Hill Subdivision
- Sand Island (historical)
- Sand Islands
- Sansarc
- Savoy
- Scenic
- Schaeferville
- Schmidt Landing
- Scotland
- Scout Island
- Sego Island (historical)
- Selby
- Seneca
- Sevenmile Corner
- Shadehill
- Shady Beach
- Shamrock Colony
- Shannon Colony
- Sharps Corner
- Sheffield
- Shelby
- Sheldon Trailor Town
- Sherman