- Sacajawea Island
- Saco
- Saddle Butte
- Sage Creek Colony
- Saint Ignatius
- Saint Johns
- Saint Marie
- Saint Mary
- Saint Peter
- Saint Phillip
- Saint Pierre
- Saint Regis
- Saint Xavier
- Salem
- Salmon Prairie
- Saltese
- Samples Crossing
- Sand Coulee
- Sand Springs
- Sanders
- Sangrey
- Santa Rita
- Sapphire Village
- Sappington
- Sarpy
- Saugus
- Savage
- Savoy
- Sawyers Trailer Park
- Sayle