- Smith Island
- Sodak Mill
- Spear
- Sprinkle Trailer Court
- Sturgeon Island
- Selmes
- Simpkins Place
- Stones Trailer Park
- Shepherd Crossing
- Shonkin Bar
- Stranahan
- Sacajawea Island
- Saint Peter
- Salem
- Sheffels
- Smelter Hill
- Steamboat Island
- Smiths Trailer Court
- Schaffer Island
- Spring Grove Trailer Court
- Stipek
- Staton
- Stuart
- Stump Town
- Sunnyside
- Samples Crossing
- Sawyers Trailer Park
- Spring Creek Junction
- Straw
- Shady Lane Mobile Home Park