- Sawyer
- Scenic View Mobile Home Park
- Sharon
- Skyview Mobile Home Park
- South Augusta
- Squaw Creek Village
- Summit
- Summit View Mobile Home Park
- Sunrise Mobile Court
- Sunset Village
- Sabula
- Sac City
- Sageville
- Saint Ansgar
- Saint Donatus
- Saint Lucas
- Saint Olaf
- Salix
- Sanborn
- Sandyville
- Saylorville
- Scarville
- Schaller
- Searsboro
- Sergeant Bluff
- Shambaugh
- Shannon City
- Selection
- Sheldahl
- Sheldon