- Split Rock Heights
- Spokane
- Spottswood
- Spring Creek
- Spring Creek Colony
- Spring Grove
- Spring Lake Colony
- Spring Valley
- Spring Valley Colony
- Springfield
- Stamford
- Stanley Corner
- Stanley Island (historical)
- State Game Lodge
- Stephan
- Stickney
- Stockholm
- Stone Bridge
- Stoneville
- Storla
- Strandburg
- Stratford
- Stratosphere Bowl
- Strehlow Island (historical)
- Strool
- Sturgis
- Sulphur
- Summerset
- Summerville
- Summit