35 zips
| Zip Code | City | Population ↓ |
|---|---|---|
| 95503 | Eureka | 24,072 |
| 95501 | Eureka | 23,706 |
| 95521 | Arcata | 21,712 |
| 95519 | Mckinleyville | 18,781 |
| 95540 | Fortuna | 14,415 |
| 95562 | Rio Dell | 3,396 |
| 95536 | Ferndale | 3,258 |
| 95542 | Garberville | 2,862 |
| 95546 | Hoopa | 2,666 |
| 95570 | Trinidad | 2,523 |
| 95551 | Loleta | 1,789 |
| 95524 | Bayside | 1,700 |
| 95528 | Carlotta | 1,555 |
| 95573 | Willow Creek | 1,417 |
| 95525 | Blue Lake | 1,358 |
| 95560 | Redway | 1,337 |
| 95589 | Whitethorn | 1,153 |
| 95549 | Kneeland | 1,140 |
| 95547 | Hydesville | 1,121 |
| 95553 | Miranda | 1,037 |
| 95565 | Scotia | 860 |
| 95556 | Orleans | 692 |
| 95526 | Bridgeville | 638 |
| 95537 | Fields Landing | 629 |
| 95564 | Samoa | 564 |
| 95545 | Honeydew | 492 |
| 95555 | Orick | 370 |
| 95554 | Myers Flat | 313 |
| 95558 | Petrolia | 246 |
| 95550 | Korbel | 213 |
| 95514 | Blocksburg | 117 |
| 95511 | Alderpoint | 102 |
| 95569 | Redcrest | 91 |
| 95571 | Weott | 30 |
| 95559 | Phillipsville | 0 |
The data shown reflect ZCTAs from the US Census. As of 2024, there are 35 ZCTAs in Humboldt County, California (US Census).