🇺🇸 United States ZIP Code

STANDARD

95521

Arcata

ZIP Code 95521 is a standard zip code serving Arcata, Arcata, California (CA), in Humboldt County, United States. It has an estimated population of 20,199 with a median household income of $34,046. The area falls within the America/Los_Angeles timezone.

Median Household Income vs. National Average

Location

Country: 🇺🇸 United States
State / Province: California (CA)
County: Humboldt
City: Arcata
Timezone: America/Los_Angeles

Coordinates

Latitude: 40.874200
Longitude: -124.076500

Geographic Details

Land Area: 53.50 mi²
Water Area: 17.71 mi²
Population Density: 378.0 people per mi² (65th percentile)
Bounding Box: 40.956031°N, 40.751948°S, -123.888979°E, -124.244378°W

With 20,199 residents spread across 53.50 square miles, this area has a population density of 378.0 people per square mile.

Demographics

20,199

Population

80th percentile

$34,046

Median Income

15th percentile

$345,100

Median Home Value

90th percentile

53.50 mi²

Land Area

The median household income in 95521 is $34,046, and the median home value is $345,100. This is below the national average for household income.

Housing

9,068

Total Units

8,643

Occupied Units

95.3%

Occupancy Rate

Nearby ZIP Codes

Other zip codes in Arcata, CA.

95518

Arcata

Similar ZIP Codes in California

ZIP codes with similar median household income in California.

96109

Doyle

$34,313

96025

Dunsmuir

$32,000

90061

Los Angeles

$33,476

92241

Desert Hot Springs

$37,279

90020

Los Angeles

$38,510

92411

San Bernardino

$31,288

95445

Gualala

$37,389

95573

Willow Creek

$31,530

Frequently Asked Questions

What information is available for each ZIP code?

Each ZIP code page shows city, state, county, geographic coordinates, timezone, population, median household income, median home value, housing units, land area, population density, commute time, educational attainment, area codes, and ZIP code type (Standard, PO Box, or Unique).

What are the different types of ZIP codes?

There are three types of ZIP codes: Standard (residential and commercial delivery areas), PO Box (assigned to post office box sections), and Unique (assigned to a single high-volume address like a government agency or large company). Standard ZIP codes are the most common.

How often is ZIP code data updated?

ZIP code assignments are updated quarterly by the USPS. Demographic data comes from the US Census Bureau's American Community Survey (ACS), which releases new 5-year estimates annually. ZipFYI updates its data to reflect the latest available information.

What is population density and why does it matter?

Population density measures the number of people per square mile in a ZIP code area. It helps identify urban vs. rural areas, affects real estate values, impacts service availability, and is used in market analysis. Dense urban ZIP codes may have 50,000+ people per square mile.

How are ZIP code boundaries determined?

ZIP code boundaries are determined by the USPS based on mail delivery routes, not political or geographic boundaries. They follow carrier routes and may cross city, county, or even state lines. Boundaries can change when the USPS reorganizes delivery operations.

What does median household income tell me about a ZIP code?

Median household income is the middle value when all household incomes in a ZIP code are sorted. Half of households earn more and half earn less. It is a better indicator of typical earnings than average income, which can be skewed by very high or very low outliers.