ZIP Code 95558 — Petrolia, California

    📍 ZIP code 95558 is in Petrolia, Humboldt County, California.

    ZIP code 95558 is located in Petrolia, Humboldt County, California. It is a standard zip code in the Pacific Time Zone with an estimated population of 246. The area code for zip code 95558 is 707.

    ZIP
    95558
    City
    Petrolia
    County
    Humboldt County
    State
    California
    Time Zone
    Pacific
    Area Code
    707
    Type
    Standard
    USPS City
    Petrolia
    Latitude
    40.2983° N
    Longitude
    124.2431° W
    Land Area
    168.4 sq mi
    Water Area
    0.3 sq mi

    ZIP Code 95558 Map

    Coordinates: 40.2983°N, 124.2431°W

    ZIP Code 95558 Demographics

    Population

    Total Population246
    Density1/sq mi
    Median Age64.5
    Male / Female48.4% / 51.6%

    Income & Economy

    Median Household$42,917
    Per Capita$40,704
    Poverty Rate27.6%
    Unemployment1.8%

    Housing

    Total Units213
    Owner-Occupied69.2%
    Renter-Occupied30.8%
    Median Home Value$1,041,700
    Median Rent$0

    Education

    High School Grad96.3%
    Bachelor's Degree25.2%

    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 95558 in Context

    The median home in 95558 is valued at $1,041,700 against a median household income of $42,917, a price-to-income ratio of 24.3. That is far above 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, which means a household earning the local median income cannot finance the local median home on conventional terms. Within Humboldt County, 95558 ranks 25 of 26 ZIPs on affordability (1 = lowest ratio); the county median ratio is 7.2.

    95558 ranks 1,484 of 1,558 statewide on median household income and 294 of 1,558 on median home value; its income is below the $60,178 Humboldt County median. 69% of households own their home, above the 64% statewide ZIP median, making this a majority-owner ZIP. 25% of adults hold a bachelor's degree or higher, below the 31% median, and the poverty rate is 27.6%, far above the 10.8% statewide ZIP median and among the highest in the state. Unemployment stands at 1.8%.

    With 1 residents per square mile across 168.4 square miles of land, 95558 is far less dense than the statewide ZIP median of 1,120 (rank 1,546 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 95558 primarily serves Petrolia in Humboldt County, California.

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