- Shamrock Mobile Home Court
- Shedeeds Trailer Court
- Sheens Trailer Court
- Sheep Island
- Sheldonville
- Shestak
- Shippee
- Shoemaker Island
- Simeon
- Sioux View Park
- Skyline
- Smith Trailer Court
- Smittys Mobile Home Plaza
- Smyrna
- Somerset
- South Bayard
- South Broad Trailer Court
- South Mitchell
- South Morrill
- South Omaha
- South Side Mobile Home Court
- South Side Mobile Home Park
- South Yankton
- Southside Trailer Park
- Sparks
- Sparta
- Spelts
- Spurior Place
- Spurville
- Stafford