- Saint Lawrence
- Scotland
- Selby
- Saint Charles
- Saint Francis
- Salem
- Seneca
- Sherman
- Spencer
- Springfield
- Stratford
- Sturgis
- Summit
- South Shore
- Spring Creek
- Stickney
- Stockholm
- Sinai
- Sioux Falls
- Sisseton
- Saint Johns Island (historical)
- Saint Onge
- Sanator
- Sand Hill Subdivision
- Sand Island (historical)
- Sand Islands
- Sansarc
- Savoy
- Scenic
- Schaeferville