Eureka California ZIP Codes
Eureka holds 3 ZIP codes, all inside one county and one postal prefix.
Every ZIP code in Eureka
| ZIP code | County |
|---|---|
| 95501 | Humboldt County |
| 95502 | Humboldt County |
| 95503 | Humboldt County |
We do not publish a delivery type (standard, PO box, unique) or a neighbourhood for each ZIP. USPS delivery-type products are licensed, and no clean-rights source maps ZIP codes to neighbourhoods — so the Eureka codes above are listed without a column we would have to invent.
Scope every ZIP code recorded for Eureka. Source GeoNames US postal codes (2026-07 postal dump) and Census 2024 county Gazetteer (2024 Gazetteer). Updated . ZIP codes are delivery-route groupings, not areas; the boundaries implied by any ZIP map are approximations.
How these codes cluster
Every Eureka ZIP code begins 955. Those first three digits identify the sectional center facility that processes mail for this part of California. Statewide that range covers 51 ZIP codes, so Eureka accounts for 6% of it.
Every California ZIP prefix and the region it covers →
Area codes covering Eureka
ZIP codes and area codes are separate systems — one routes mail, the other routes calls — and they do not share boundaries. The codes below serve the same ground Eureka occupies.
Eureka California area codes in full →
Where Eureka's ZIP codes sit
- Reference points and footprint
- Not an official NANPA boundary
- Not a USPS delivery area
Cities near Eureka
| City | Distance | ZIP codes |
|---|---|---|
| Arcata California ZIP codes | 6.1 mi | 2 ZIP codes |
| Blue Lake California ZIP codes | 10 mi | 1 ZIP code |
| Fortuna California ZIP codes | 15 mi | 1 ZIP code |
| Ferndale California ZIP codes | 16 mi | 1 ZIP code |
| Trinidad California ZIP codes | 18 mi | 1 ZIP code |
| Rio Dell California ZIP codes | 21 mi | 1 ZIP code |
| Crescent City California ZIP codes | 67 mi | 2 ZIP codes |
| Etna California ZIP codes | 80 mi | 1 ZIP code |
Straight-line distance between place reference points, not driving distance.