| Official Zip Code Name | Eureka |
| Zip Code State | California |
| Primary County: | Humboldt |
| Area Code | 707 |
| Current Population: | 37081 |
| Racial Majority: | White 62.49% |
| Median Household Income | $55618 |
| Average Adjusted Gross Income | $89060 |
| Time Zone: | 8 |
| Elevation Range | 21 ft. |
| Area | 7.336 Sqm. |
| Coordinates(Y,X) | 40.799466, -124.152700 |