- San Pedro Hill
- San Pedro Rock
- San Quentin
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- San Ramón
- San Ramon
- San Ramon Village
- San Simeon
- San Tomas
- San Ysidro
- San Ysidro
- Sanborn
- Sand Canyon
- Sand City
- Sand Hill
- Sandberg
- Sanders
- Sandia
- Sandoz
- Sandpiper Mobile Home Park
- Sands
- Sandy Gulch
- Sandy Korner
- Sandyland
- Sandyland Cove
- Sanger
- Sanitarium
- Sankey
- Santa Ana
- Santa Ana Heights