Eureka, CA ZIP Codes & Directory
Eureka is located in Humboldt County in California. Browse all active 5-digit USPS ZIP codes serving Eureka and surrounding Humboldt County delivery districts.
All ZIP Codes in Eureka, CA
2 CodesAbout Eureka Mail Delivery & Postal Administration
ZIP codes in Eureka are administered by the United States Postal Service. Delivery routes are coordinated through regional Sectional Center Facilities (SCFs) servicing Humboldt County and surrounding California metropolitan districts.
Frequently Asked Questions About Eureka, CA ZIP Codes
How many ZIP codes serve Eureka, California? ▾
Eureka, California is served by 2 active USPS postal delivery codes: 95501, 95503.
What county is Eureka located in? ▾
Eureka is an incorporated city located within Humboldt County, California.
What is the population and demographic size of Eureka? ▾
According to official U.S. Census Bureau data, Eureka has an estimated population of 47,811 residents and is situated within the undefined.
How does mail sorting and delivery work in Eureka? ▾
Mail delivery in Eureka is operated by the United States Postal Service (USPS) through regional Sectional Center Facility (SCF) distribution plants servicing Humboldt County and surrounding California counties.
How much does it cost to ship a package to Eureka, CA? ▾
Shipping costs to Eureka depend on the package weight, dimensions, shipping carrier (USPS, UPS, FedEx), and the distance from the origin ZIP code. To calculate exact postage rates, use our shipping cost estimator tool.
What is the standard delivery time for mail to Eureka? ▾
Standard USPS Ground Advantage typically takes 2-5 business days to reach Eureka, depending on the origin. Priority Mail generally arrives in 1-3 business days. Please check tracking for specific regional routing times.