- Saint Cloud
- Saint Croix Falls
- Saint Francis
- Saint Joseph
- Saint Nazianz
- Saint Peter
- Sandy Hook
- Sauk City
- Saukville
- Saxeville
- Saxon
- Sayner
- Scandinavia
- Schofield
- Sextonville
- Seymour
- Seymour
- Shawano
- Sheboygan Falls
- Sheldon
- Shell Lake
- Sherry
- Sherwood
- Shiocton
- Shorewood
- Shorewood Hills
- Shullsburg
- Silver Lake
- Silver Lake
- Siren
- Sister Bay
- Slinger
- Sobieski
- Soldiers Grove
- Solon Springs
- Somers
- South Milwaukee
- South Wayne
- Sparta
- Spencer
- Spooner
- Spring Green
- Stanley
- Star Prairie
- Stetsonville
- Steuben
- Stevens Point
- Stockbridge
- Stockholm
- Stoddard
- Stone Lake
- Stoughton
- Strum
- Sturgeon Bay
- Sturtevant
- Suamico
- Sullivan
- Summit Lake
- Sun Prairie
- Sunburst
- Superior Village
- Suring
- Sussex
- Sylvan
