- Shady Grove Mobile Home Park
- Shady Oak
- Shaffton
- Shambaugh
- Shannon City
- Sharon
- Sharon
- Sharon Center
- Sharpsburg
- Shawondasse
- Sheffield
- Shelby
- Sheldahl
- Sheldon
- Shell Rock
- Shellsburg
- Shenandoah
- Sheridan
- Sherman
- Sherrill
- Sherton Heights
- Sherwood
- Shipley
- Shueyville
- Shunem
- Siam
- Sibley
- Sidney
- Sigourney
- Silver City