ZIP Code 95503
Eureka · Humboldt, California
95503 is the ZIP code of Eureka in Humboldt, California, United States.
- ZIP Code
- 95503
- County
- Humboldt
- State
- California
- Country
- United States
Place with ZIP code 95503
| Place | County | Location |
|---|---|---|
| Eureka | Humboldt | 40.759, -124.159 |
Nearby ZIP codes
Frequently asked questions
Which places use ZIP code 95503?
Eureka.
Which county and state is 95503 in?
Humboldt, California, United States.
Source: GeoNames postal codes (CC BY 4.0), geonames.org, retrieved 2026-10-22. Place coordinates are approximate. Check with the national postal service before sending anything valuable.