ZIP Code 95503 — Eureka, California

    📍 ZIP code 95503 is in Eureka, Humboldt County, California.

    ZIP code 95503 is located in Eureka, Humboldt County, California. It is a standard zip code in the Pacific Time Zone with an estimated population of 24,072. The area code for zip code 95503 is 707.

    ZIP
    95503
    City
    Eureka
    County
    Humboldt County
    State
    California
    Time Zone
    Pacific
    Area Code
    707
    Type
    Standard
    USPS City
    Eureka
    Latitude
    40.7383° N
    Longitude
    124.1076° W
    Land Area
    83.7 sq mi
    Water Area
    0.8 sq mi

    ZIP Code 95503 Map

    Coordinates: 40.7383°N, 124.1076°W

    ZIP Code 95503 Demographics

    Population

    Total Population24,072
    Density288/sq mi
    Median Age45.7
    Male / Female48.1% / 51.9%

    Income & Economy

    Median Household$68,307
    Per Capita$35,991
    Poverty Rate17%
    Unemployment5.6%

    Housing

    Total Units10,586
    Owner-Occupied71.5%
    Renter-Occupied28.5%
    Median Home Value$378,600
    Median Rent$1,312

    Education

    High School Grad90.7%
    Bachelor's Degree30.9%

    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).

    Affordability & Profile: ZIP 95503 in Context

    The median home in 95503 is valued at $378,600 against a median household income of $68,307, a price-to-income ratio of 5.5. That is below the 6.7 median across the 1,558 California ZIP codes with published housing data, and well past the 3.0 ratio that marks an attainable market nationally, though it is among the more attainable ratios in the state. Within Humboldt County, 95503 ranks 4 of 26 ZIPs on affordability (1 = lowest ratio); the county median ratio is 7.2. Renting takes 23.0% of median household income (median rent $1,312 a month), under the 30% cost-burden threshold.

    95503 ranks 1,108 of 1,558 statewide on median household income and 1,150 of 1,558 on median home value; its income is above the $60,178 Humboldt County median. 72% of households own their home, above the 64% statewide ZIP median, making this a majority-owner ZIP. 31% of adults hold a bachelor's degree or higher, in line with the 31% median, and the poverty rate is 17.0%, far above the 10.8% statewide ZIP median. Unemployment stands at 5.6%.

    With 288 residents per square mile across 83.7 square miles of land, 95503 is far less dense than the statewide ZIP median of 1,120 (rank 994 of 1,558). This is rural or open territory where most of the land is agricultural, forest, desert or public land.

    Ratios and ranks are computed from the ACS figures above across the 1,558 California ZIP codes with published housing data. See the 2026 California affordability report for the statewide analysis and the methodology for definitions.

    Nearby Zip Codes

    Cities & Places Served

    ZIP code 95503 primarily serves Eureka in Humboldt County, California.

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