- Sperry Chalets
- Sphinx
- Spion Kop
- Split Rock Junction
- Spraklin Island
- Spring Creek Junction
- Spring Grove Trailer Court
- Spring Gulch
- Springdale
- Springdale Colony
- Springhill
- Springhill Park
- Springtime
- Springtown
- Springwater Colony
- Sprinkle Trailer Court
- Sprole
- Spurling
- Square Butte
- Stacey
- Staley Place
- Stanford
- Star
- Star Mobile Home Park
- Stark
- Starr School
- Staton
- Steamboat Island
- Steamboat Island
- Stephensons Trailer Court