| Official Zip Code Name | Castro Valley |
| Zip Code State | California |
| Primary County: | Alameda |
| Area Code | 510/341 |
| Current Population: | 37081 |
| Racial Majority: | White 62.49% |
| Median Household Income | $55618 |
| Average Adjusted Gross Income | $89060 |
| Time Zone: | 8 |
| Elevation Range | 894 ft. |
| Area | 51.8 Sqm. |
| Coordinates(Y,X) | 37.695349, -121.982020 |