- Shelby
- Shepherd
- Sheridan
- Sidney
- Somers
- Stanford
- Stevensville
- Superior
- Saco
- Sun Prairie
- Sacajawea Island
- Sage Creek Colony
- Saint Johns
- Saint Mary
- Saint Peter
- Saint Phillip
- Saint Pierre
- Salem
- Salmon Prairie
- Saltese
- Samples Crossing
- Sand Coulee
- Sand Springs
- Sanders
- Sangrey
- Santa Rita
- Sapphire Village
- Sappington
- Sarpy
- Saugus