Arcata, California Zip Codes
📍 Arcata is in Humboldt County, California with 2 zip codes; the most populous is 95521.
Arcata is a USPS city name in Humboldt County, California with a Census population of approximately 21,712 across its ZIP codes. Humboldt County as a whole has 38 ZIP codes in this directory. Below you'll find every zip code serving Arcata with population, income and home value, a map, and the city's affordability profile.
Population and demographic data sourced from the U.S. Census Bureau American Community Survey (ACS) 5-Year Estimates. ZIP code routing data sourced from the United States Postal Service (USPS).
All Arcata Zip Codes
Arcata at a Glance
Arcata has 2 ZIP codes in this directory: 1 standard delivery ZIP and 1 PO Box or unique ZIP that carries no resident population in Census data. The 1 ZIP with published Census housing data cover 21,712 residents, the largest being 95521 with 21,712 people.
The median ZIP in Arcata has a household income of $47,764 and a home value of $441,900, a price-to-income ratio of 9.3, above the 6.7 California ZIP median. Median rent across these ZIPs is $1,251 a month.
37% of households in the typical Arcata ZIP own their home (statewide ZIP median 64%). 46% of adults hold a bachelor's degree, above the 31% statewide median. The median poverty rate is 31.5%, far above the 10.8% statewide ZIP median. Overall density is about 359 residents per square mile across 60 square miles of ZIP land area.
Medians are taken across the ZIP codes listed below (each ZIP weighted equally); PO Box and no-data ZIPs are excluded. Definitions on the methodology page; statewide comparisons in the 2026 California ZIP Code Affordability Report.
Arcata Zip Code Map
Interactive map of Arcata, California zip codes. Click any marker for details.