- Skinners Island
- Skones
- Skyline
- Skyline Trailer Court
- Slab Crossing
- Sleeping Buffalo
- Sloan
- Smelter Hill
- Smith Island
- Smiths Trailer Court
- Snake Island
- Snawmut
- Snider
- Snowberg Court
- Snowden
- Snowslip
- Soda Springs
- Sodak Mill
- Sohon
- Somers
- Sonnette
- Soudan
- Sourdough
- Sourdough Island
- South Browning
- South Glastonbury
- South Hills
- Spartan Manor Trailer Park
- Spear
- Speer Trailer Park