| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| Soapweed | city | California | United States | 38.84 | -120.68 | 3559 | |
| Soboba Hot Springs | city | California | United States | 33.80 | -116.93 | 1669 | |
| Sobrante | city | California | United States | 38.00 | -122.35 | 104 | |
| Soda Bay | city | California | United States | 39.00 | -122.79 | 1669 | |
| Soda Springs | city | California | United States | 39.32 | -120.38 | 6797 | |
| Soda Springs | city | California | United States | 39.02 | -123.32 | 1669 | |
| Soda Springs | city | California | United States | 39.42 | -123.43 | 830 | |
| Soda Springs | city | California | United States | 36.04 | -118.76 | 1669 | |
| Soda Springs | city | California | United States | 39.25 | -120.33 | 6223 | |
| Solana Beach | city | California | United States | 32.99 | -117.27 | 19 | |
| Solano City (historical) | city | California | United States | 38.23 | -121.87 | 78 | |
| Soledad | city | California | United States | 36.42 | -121.33 | 190 | |
| Soledad Sulphur Springs (historical) | city | California | United States | 34.43 | -118.36 | 1998 | |
| Solemint | city | California | United States | 34.42 | -118.45 | 1669 | |
| Solon (historical) | city | California | United States | 34.95 | -117.80 | 2509 | |
| Solromar | city | California | United States | 34.05 | -118.95 | 0 | |
| Solvang | city | California | United States | 34.60 | -120.14 | 396 | |
| Solvang i California | city | California | United States | 34.60 | -120.14 | 396 | |
| Solvanq | city | California | United States | 34.60 | -120.14 | 396 | |
| Solyo | city | California | United States | 37.61 | -121.26 | 88 | |
| Somerset | city | California | United States | 38.65 | -120.69 | 2509 | |
| Somerset | city | California | United States | 41.85 | -121.99 | 4274 | |
| Somersville | city | California | United States | 37.96 | -121.86 | 862 | |
| Somes Bar | city | California | United States | 41.38 | -123.48 | 2509 | |
| Somis | city | California | United States | 34.26 | -119.00 | 341 | |
| Somis (historical) | city | California | United States | 34.25 | -119.00 | 328 | |
| Sonoma | city | California | United States | 38.29 | -122.46 | 72 | |
| Sonoma Vista | city | California | United States | 38.31 | -122.51 | 196 | |
| Sonora | city | California | United States | 37.98 | -120.38 | 1833 | |
| Sonora Hills | city | California | United States | 37.98 | -120.37 | 1902 | |
| Sonora Junction | city | California | United States | 38.35 | -119.45 | 7083 | |
| Sonora Knolls | city | California | United States | 37.99 | -120.39 | 1797 | |
| Sonora Meadows | city | California | United States | 38.01 | -120.29 | 3349 | |
| Sonora Ranchettes | city | California | United States | 37.95 | -120.33 | 2509 | |
| Soquel | city | California | United States | 36.99 | -121.96 | 68 | |
| Sorensens | city | California | United States | 38.77 | -119.90 | 7549 | |
| Sorenson | city | California | United States | 37.65 | -122.07 | 190 | |
| Sorrento | city | California | United States | 32.90 | -117.22 | 193 | |
| Sorroca | city | California | United States | 38.34 | -121.61 | 3 | |
| Soto (historical) | city | California | United States | 39.88 | -122.02 | 187 | |
| Soto Street Junction | city | California | United States | 34.02 | -118.22 | 196 | |
| Soudan | city | California | United States | 38.60 | -121.28 | 124 | |
| Soulsbyville | city | California | United States | 37.98 | -120.26 | 3349 | |
| Sousa Corners | city | California | United States | 38.45 | -122.86 | 196 | |
| South Adelanto | city | California | United States | 34.53 | -117.42 | 3349 | |
| South Anaheim | city | California | United States | 33.81 | -117.90 | 121 | |
| South Bay Terraces | city | California | United States | 32.68 | -117.04 | 314 | |
| South Berkeley | city | California | United States | 37.85 | -122.27 | 141 | |
| South Camanche Shore | city | California | United States | 38.21 | -120.90 | 400 | |
| South Carthay | city | California | United States | 34.06 | -118.37 | 111 | |
| South Central | city | California | United States | 33.93 | -118.28 | 127 | |
| South Corcoran | city | California | United States | 36.09 | -119.55 | 200 | |
| South Coyote | city | California | United States | 37.20 | -121.72 | 278 | |
| South Crest | city | California | United States | 32.69 | -117.11 | 78 | |
| South Dos Palos | city | California | United States | 36.96 | -120.65 | 114 | |
| South El Monte | city | California | United States | 34.05 | -118.05 | 229 | |
| South Encantato | city | California | United States | 32.70 | -117.07 | 249 | |
| South Fontana | city | California | United States | 34.06 | -117.49 | 1046 | |
| South Fork | city | California | United States | 37.23 | -119.49 | 2847 | |
| South Fork | city | California | United States | 39.43 | -123.73 | 196 | |
| South Fork (historical) | city | California | United States | 39.54 | -121.42 | 944 | |
| South Gate | city | California | United States | 33.95 | -118.21 | 98 | |
| South Grove Mobile Home Estates | city | California | United States | 33.76 | -117.94 | 42 | |
| South Laguna | city | California | United States | 33.50 | -117.74 | 134 | |
| South Lake | city | California | United States | 35.64 | -118.37 | 3349 | |
| South Lake Tahoe | city | California | United States | 38.93 | -119.98 | 6295 | |
| South Landing | city | California | United States | 37.58 | -118.73 | 6856 | |
| South Leggett | city | California | United States | 39.85 | -123.71 | 1010 | |
| South Los Angeles | city | California | United States | 33.93 | -118.28 | 127 | |
| South Oceanside | city | California | United States | 33.18 | -117.36 | 45 | |
| South Oroville | city | California | United States | 39.50 | -121.55 | 223 | |
| South Park | city | California | United States | 32.72 | -117.13 | 160 | |
| South Park | city | California | United States | 33.57 | -117.03 | 1725 | |
| South Pasadena | city | California | United States | 34.12 | -118.15 | 830 | |
| South Sacramento | city | California | United States | 38.51 | -121.46 | 19 | |
| South San Diego | city | California | United States | 32.58 | -117.10 | 42 | |
| South San Francisco | city | California | United States | 37.65 | -122.41 | 127 | |
| South San Gabriel | city | California | United States | 34.06 | -118.09 | 298 | |
| South San Jose Hills | city | California | United States | 34.01 | -117.90 | 416 | |
| South Santa Ana | city | California | United States | 33.71 | -117.87 | 39 | |
| South Santa Rosa | city | California | United States | 38.40 | -122.73 | 111 | |
| South Shore | city | California | United States | 37.76 | -122.26 | 0 | |
| South Shore Port | city | California | United States | 37.43 | -122.04 | 9 | |
| South Taft | city | California | United States | 35.13 | -119.46 | 1092 | |
| South Trona | city | California | United States | 35.72 | -117.40 | 1669 | |
| South Vallejo | city | California | United States | 38.09 | -122.24 | 32 | |
| South Wawona | city | California | United States | 37.54 | -119.64 | 4373 | |
| South Wawona (historical) | city | California | United States | 37.54 | -119.64 | 4373 | |
| South Whittier | city | California | United States | 33.96 | -118.04 | 170 | |
| South Yuba | city | California | United States | 39.13 | -121.59 | 59 | |
| South Yuba City | city | California | United States | 39.12 | -121.64 | 45 | |
| Southgate | city | California | United States | 37.43 | -122.15 | 134 | |
| Southport Landing | city | California | United States | 40.69 | -124.25 | 150 | |
| Southridge Village | city | California | United States | 34.04 | -117.49 | 872 | |
| Southside Highlands | city | California | United States | 39.32 | -120.27 | 6765 | |
| Southwest Village | city | California | United States | 33.85 | -118.31 | 68 |