- Saint Thomas
- Sainte Genevieve
- Scott City
- Sedalia
- Seligman
- Skidmore
- Spokane
- Springfield
- Steele
- Stoutsville
- Strafford
- Summersville
- Sundown
- South Fritz Island
- South River
- Sabula
- Saco
- Sacville
- Saddlebrooke
- Sadler
- Safe
- Sage Hill
- Sagrada
- Saint Albans
- Saint Albans Island
- Saint Annie
- Saint Anthony
- Saint Aubert
- Saint Aubert Island
- Saint Catharine