- South Park
- South Pass City
- South Superior
- South Torrington
- Speer
- Spotted Horse
- Squaw Place
- Stansbury
- Star Valley Ranch
- Stevenson Island
- Story
- Stroner
- Strouds
- Sunburst
- Sundance
- Sunrise
- Sunshine
- Superior
- Sussex
- Sussex Unit
- Swaim Place
- Sweeney Ranch
- Sweetwater Crossing
- Sweetwater Station
- Sylvan Bay Summer Home Area