Towns
| State | City/Town | Town Title |
|---|---|---|
| California | Shoshone | Shoshone, CA |
| California | Sierra City | Sierra City, CA |
| California | Sierra Madre | Sierra Madre, CA |
| California | Sierraville | Sierraville, CA |
| California | Signal Hill | Signal Hill, CA |
| California | Silverado | Silverado, CA |
| California | Simi Valley | Simi Valley, CA |
| California | Sites | Sites, CA |
| California | Six Rivers National Fore | Six Rivers National Fore, CA |
| California | Six Rivers Ntl Forest | Six Rivers Ntl Forest, CA |
| California | Skyforest | Skyforest, CA |
| California | Sloughhouse | Sloughhouse, CA |
| California | Smartville | Smartville, CA |
| California | Smith River | Smith River, CA |
| California | Snelling | Snelling, CA |
| California | Soda Springs | Soda Springs, CA |
| California | Solana Beach | Solana Beach, CA |
| California | Soledad | Soledad, CA |
| California | Solvang | Solvang, CA |
| California | Somerset | Somerset, CA |
| California | Somes Bar | Somes Bar, CA |
| California | Somis | Somis, CA |
| California | Sonoma | Sonoma, CA |
| California | Sonora | Sonora, CA |
| California | Soquel | Soquel, CA |