| Post Office | Eureka |
| Division | Humboldt |
| Pincode | 95503 |
| Post Office | Eureka |
| Division | Humboldt |
| Pincode | 95501 |
| Post Office | Arcata |
| Division | Humboldt |
| Pincode | 95521 |
| Post Office | Mckinleyville |
| Division | Humboldt |
| Pincode | 95519 |
| Post Office | Fortuna |
| Division | Humboldt |
| Pincode | 95540 |
| Post Office | Hoopa |
| Division | Humboldt |
| Pincode | 95546 |
35 City in Humboldt | List of Zip Codes Location In California and Your selected County Humboldt
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