Humboldt County, California Zip Codes
📍 Humboldt County has 38 zip codes with a population of 136,355.
Humboldt County is located in California with a land area of 2,658 square miles. The county seat is Eureka. Below you'll find all 38 zip codes in Humboldt County with population, income and home value, the county's affordability profile, and links to its 33 city pages.
Population and demographic data sourced from the U.S. Census Bureau American Community Survey (ACS) 5-Year Estimates. ZIP code routing data sourced from the United States Postal Service (USPS).
All Humboldt County Zip Codes
| ZIP Code | City | Details |
|---|---|---|
| 95501 | Eureka | View → |
| 95502 | Eureka | View → |
| 95503 | Eureka | View → |
| 95511 | Alderpoint | View → |
| 95514 | Blocksburg | View → |
| 95518 | Arcata | View → |
| 95519 | Mckinleyville | View → |
| 95521 | Arcata | View → |
| 95524 | Bayside | View → |
| 95525 | Blue Lake | View → |
| 95526 | Bridgeville | View → |
| 95528 | Carlotta | View → |
| 95534 | Cutten | View → |
| 95536 | Ferndale | View → |
| 95537 | Fields Landing | View → |
| 95540 | Fortuna | View → |
| 95542 | Garberville | View → |
| 95545 | Honeydew | View → |
| 95546 | Hoopa | View → |
| 95547 | Hydesville | View → |
| 95549 | Kneeland | View → |
| 95550 | Korbel | View → |
| 95551 | Loleta | View → |
| 95553 | Miranda | View → |
| 95554 | Myers Flat | View → |
| 95555 | Orick | View → |
| 95556 | Orleans | View → |
| 95558 | Petrolia | View → |
| 95559 | Phillipsville | View → |
| 95560 | Redway | View → |
| 95562 | Rio Dell | View → |
| 95564 | Samoa | View → |
| 95565 | Scotia | View → |
| 95569 | Redcrest | View → |
| 95570 | Trinidad | View → |
| 95571 | Weott | View → |
| 95573 | Willow Creek | View → |
| 95589 | Whitethorn | View → |
Humboldt County at a Glance
Humboldt County has 38 ZIP codes in this directory: 34 standard delivery ZIPs and 4 PO Box or unique ZIPs that carry no resident population in Census data. The 26 ZIPs with published Census housing data cover 136,355 residents, the largest being 95503 (Eureka) with 24,072 people.
The median ZIP in Humboldt County has a household income of $60,178 and a home value of $407,900, a price-to-income ratio of 7.2, above the 6.7 California ZIP median. Affordability ranges from 95537 in Fields Landing at a ratio of 3.3 to 95558 in Petrolia, where the median home is $1,041,700. The highest median income is in 95550 (Korbel) at $96,336. Median rent across these ZIPs is $1,178 a month.
61% of households in the typical Humboldt County ZIP own their home (statewide ZIP median 64%). 23% of adults hold a bachelor's degree, below the 31% statewide median. The median poverty rate is 20.3%, far above the 10.8% statewide ZIP median. Overall density is about 51 residents per square mile across 2,658 square miles of ZIP land area.
Medians are taken across the ZIP codes listed below (each ZIP weighted equally); PO Box and no-data ZIPs are excluded. Definitions on the methodology page; statewide comparisons in the 2026 California ZIP Code Affordability Report.
Humboldt County Zip Code Map
Interactive map of Humboldt County, California zip codes.