- Shook's Riverside Mobile Home Park
- Shoreland
- Shoreway Mobile Home Park
- Shorewood Village
- Short Line Junction
- Short Trailer Park
- Shoups Mobile Home Park
- Shreve
- Shrine Road Mobile Home Park
- Shunk
- Shyville
- Siam
- Sidney
- Signal
- Silica
- Silo
- Silver Creek
- Silver Lake
- Silver Run
- Silver Springs
- Silver Springs
- Silverton
- Simons
- Sinking Spring
- Sinns Subdivision
- Sippo
- Sippo Heights
- Sites Lake Cottage Area
- Sitka
- Siverly