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

You can find ZIP codes by city or state using our search tool. Just enter the city or state name, and you'll see all related ZIP codes instantly.

What is a ZIP+4 code?

A ZIP+4 code adds four digits to the basic five-digit ZIP code. It helps the USPS deliver mail more precisely to specific addresses or buildings.

Are ZIP codes the same as postal codes?

ZIP codes are the U.S. version of postal codes, used by the USPS to identify delivery areas. Other countries use postal codes with different formats.

Complete ZIP Codes For Humboldt, California

Browse Humboldt ZIP Codes

ZIP Codes in Humboldt 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 Humboldt ZIP Codes, you can easily identify the correct code for mailing, business, or geographic purposes.

Eureka

Post Office	Eureka
Division	Humboldt
Pincode	95503

Eureka

Post Office	Eureka
Division	Humboldt
Pincode	95501

Arcata

Post Office	Arcata
Division	Humboldt
Pincode	95521

Mckinleyville

Post Office	Mckinleyville
Division	Humboldt
Pincode	95519

Fortuna

Post Office	Fortuna
Division	Humboldt
Pincode	95540

Hoopa

Post Office	Hoopa
Division	Humboldt
Pincode	95546

Total Post Offices (38) Page 1 of 7
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Cities in Humboldt

35 cities in Humboldt County | List of ZIP Codes in California

ZIP codes in Humboldt County, California not only facilitate mail delivery but also provide important demographic and geographic insights. Each ZIP code corresponds to specific areas within the county, helping businesses, residents, and researchers understand population distribution, city locations, and service coverage across Humboldt County.

Businesses and service providers rely on accurate ZIP code information in Humboldt County to plan deliveries, target customers, and ensure timely services. By referencing the full list of ZIP codes, companies can optimize logistics and outreach, while residents can easily identify the correct postal codes for their addresses within California.

Knowing the correct ZIP codes in Humboldt County ensures fast and accurate mail delivery from the United States Postal Service (USPS). It also helps travelers, online shoppers, and local residents navigate efficiently across towns and communities in Humboldt County, making ZIP codes an essential part of daily life and business operations.