- San Ysidro
- San Ysidro
- Sanborn
- Sand Canyon
- Sand Hill
- Sandberg
- Sanders
- Sandia
- Sandoz
- Sandpiper Mobile Home Park
- Sands
- Sandy Gulch
- Sandy Korner
- Sandyland
- Sandyland Cove
- Sanitarium
- Sankey
- Santa Ana Heights
- Santa Anita
- Santa Barbara Island
- Ilha de Santa Catalina
- Ilha de Santa Cruz
- Santa Margarita
- Santa Margarita Groves
- Santa Maria
- Santa Nella
- Santa Nella Village
- Santa Rita
- Santa Rita Park
- Santa Rosa Island