| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| Asco | city | California | United States | 37.68 | -121.87 | 344 | |
| Ash (historical) | city | California | United States | 37.07 | -120.30 | 200 | |
| Ash Creek Junction | city | California | United States | 41.27 | -122.08 | 3362 | |
| Ash Creek Station (historical) | city | California | United States | 41.27 | -121.94 | 3694 | |
| Ash Hill | city | California | United States | 34.71 | -116.06 | 1850 | |
| Ashford Junction | city | California | United States | 35.91 | -116.67 | -1689 | |
| Ashford Mill (historical) | city | California | United States | 35.92 | -116.68 | -1689 | |
| Ashland | city | California | United States | 37.69 | -122.11 | 150 | |
| Ashrama | city | California | United States | 37.31 | -121.47 | 2509 | |
| Aslagang Palo Alto | city | California | United States | 37.47 | -122.14 | 45 | |
| Aspen Springs | city | California | United States | 37.55 | -118.71 | 7549 | |
| Aspen Valley | city | California | United States | 37.83 | -119.77 | 6187 | |
| Aspendell | city | California | United States | 37.24 | -118.60 | 8471 | |
| Asphalt Mines (historical) | city | California | United States | 35.19 | -120.61 | 262 | |
| Asphalto (historical) | city | California | United States | 35.30 | -119.60 | 997 | |
| Asti | city | California | United States | 38.76 | -122.97 | 311 | |
| Asuncion | city | California | United States | 35.51 | -120.68 | 994 | |
| Asylum | city | California | United States | 39.13 | -123.20 | 830 |