- Strongs Prairie
- Sanborn
- Sedgwick
- Shanagolden
- South Twin Island
- Stockton Island
- Stout Island
- Sumner
- Salmo
- Sand Bay
- Sand Island
- Sioux
- Sutherland
- Shirley
- Sniderville
- Sugar Bush
- Saint Anna
- Saint Catherines Bay
- Saint John
- Sunset Beach
- Snipe Island
- Somerfield Island (historical)
- Stirn Island (historical)
- Sherwood
- Shortville
- Sidney
- Spokeville
- Sheep Island
- Saint Feriole Island
- Schmidt Island