- Superior
- Schleswig
- Slater
- Sloan
- Smithland
- Spirit Lake
- Stacyville
- Stanhope
- Stout
- Sutherland
- Skunk River
- Spring Grove
- Sand Bar Beach Resort and Trailer Court
- Shawondasse
- South Switch Junction
- Summit Village Dyersville Park
- Scott
- Santiago
- Saylor
- Saylor Station
- South Ridge Estates
- Stover Heights Community
- Sunny-Brook Mobile Home Park
- Swanwood
- Salina
- Sand Springs
- Saratoga
- Schley
- Selma
- Seney