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Zip Code 95521 — Arcata, CA

95521 is a ZIP Code associated with Arcata, CA, located within Humboldt. The postal region supports an estimated population of 21,980 residents across Data Pending housing units, with a population density of 140.6 people per square mile.
WorldPlaceData database updated: October 2026

📍 View location on OpenStreetMap (40.845860, -124.047450)

Data MetricLocal Statistic
Postal / Zip Code95521
Primary CityArcata
State / ProvinceCA
CountyHumboldt
Total Population21,980
Median Household IncomeData Pending
Total Housing UnitsData Pending
Population Density140.6 people/sq mi
TimezoneAmerica/Los_Angeles

How 95521 Compares

MetricZIP 95521Humboldt CountyCA State Average
Population21,980134,80939,286,245
Median IncomeData PendingN/AN/A
Population Density140.6 /sq mi----

Nearby ZIP Codes

ZIP CodeCityDistancePopulationMedian Income
Zip 95524Bayside1.6 mi1,634N/A
Zip 95501Eureka5.6 mi22,890N/A
Zip 95519Mckinleyville7.8 mi18,728N/A
Zip 95503Eureka8.7 mi25,054N/A
Zip 95564Samoa9.0 mi444N/A

Data Sources & Methodology: Geographic coordinates and ZIP Code assignments are derived from underlying geographic and postal datasets. Note that ZIP Codes are USPS postal delivery areas, while Census ZCTAs are statistical approximation areas. Read full methodology →