| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| Cuba (historical) | city | California | United States | 37.36 | -120.57 | 177 | |
| Cubbler Place | city | California | United States | 39.75 | -123.15 | 1669 | |
| Cucamonga | city | California | United States | 34.11 | -117.59 | 1174 | |
| Cudahy | city | California | United States | 33.96 | -118.19 | 98 | |
| Cuernavaca | city | California | United States | 37.37 | -122.06 | 144 | |
| Cuesta Oaks | city | California | United States | 38.00 | -120.39 | 1994 | |
| Cuesta Park | city | California | United States | 37.38 | -122.08 | 150 | |
| Cuesta Serena | city | California | United States | 37.95 | -120.39 | 1669 | |
| Cuesta-by-the-Sea | city | California | United States | 35.32 | -120.85 | 111 | |
| Culver City | city | California | United States | 34.02 | -118.40 | 91 | |
| Culver Garden | city | California | United States | 33.99 | -118.43 | 39 | |
| Culver Junction | city | California | United States | 34.03 | -118.39 | 91 | |
| Cummings | city | California | United States | 39.83 | -123.63 | 1669 | |
| Cuna Vista Mobile Home Park | city | California | United States | 35.10 | -120.60 | 39 | |
| Cunard | city | California | United States | 38.81 | -121.69 | 19 | |
| Cuneo (historical) | city | California | United States | 36.25 | -119.83 | 196 | |
| Cunningham | city | California | United States | 38.36 | -122.78 | 98 | |
| Cupertino | city | California | United States | 37.32 | -122.03 | 239 | |
| Curlew | city | California | United States | 32.93 | -115.41 | -1689 | |
| Curry Village | city | California | United States | 37.74 | -119.57 | 6893 | |
| Curtis | city | California | United States | 41.20 | -121.77 | 4504 | |
| Curtis Creek Ranch | city | California | United States | 37.97 | -120.29 | 2585 | |
| Curtner | city | California | United States | 37.47 | -121.92 | 16 | |
| Cushenbury | city | California | United States | 34.35 | -116.86 | 5075 | |
| Cushing | city | California | United States | 35.43 | -120.60 | 987 | |
| Cutler | city | California | United States | 36.52 | -119.29 | 321 | |
| Cutten | city | California | United States | 40.77 | -124.14 | 187 | |
| Cuttings Wharf | city | California | United States | 38.23 | -122.31 | 3 | |
| Cuyama | city | California | United States | 34.94 | -119.62 | 2509 | |
| Cuyamaca (historical) | city | California | United States | 32.98 | -116.57 | 5029 |