How do I find a ZIP code by city or state?

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What is a ZIP+4 code?

A ZIP+4 code adds four extra digits to a standard ZIP code to help USPS sort and deliver mail more accurately.

Are ZIP codes the same as postal codes?

ZIP codes are the postal code system used in the United States. Other countries use different postal code formats.

Eureka County ZIP Codes

Browse Eureka ZIP Codes

ZIP Codes in Eureka County help organize mail delivery and define local service areas. Each ZIP Code corresponds to a specific community or post office, ensuring residents, businesses, and visitors can find accurate address information quickly. By browsing the complete list of Eureka ZIP Codes, you can easily identify the correct code for mailing, business, or geographic purposes.

Eureka

Post Office	Eureka
County	Eureka
ZIP Code	89316

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Crescent Valley

Post Office	Crescent Valley
County	Eureka
ZIP Code	89821

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