- Spring Valley
- Stebbinsville
- Strickland
- Saint Croix Meadows Mobile Home Park
- Sono Junction
- Stanton
- Sandusky
- Sand Island
- Scott Island
- Seeley
- Shepley
- Slab City
- Split Rock
- Saint Croix Falls
- Saint Nazianz
- Sauk City
- Saukville
- Scandinavia
- Schofield
- Schmidt Corner
- Shaw Landing
- Shawano
- Sheboygan
- Sheboygan Falls
- Silver Creek
- Sommer's Woodhaven Mobile Home Park
- Shiocton
- Shorewood
- Shorewood Hills
- Shullsburg