ZIP Code 94511 — Bethel Island, California

    📍 ZIP code 94511 is in Bethel Island, Contra Costa County, California.

    ZIP code 94511 is located in Bethel Island, Contra Costa County, California. It is a standard zip code in the Pacific Time Zone with an estimated population of 1,993. The area code for zip code 94511 is 925.

    ZIP
    94511
    City
    Bethel Island
    County
    Contra Costa County
    State
    California
    Time Zone
    Pacific
    Area Code
    925
    Type
    Standard
    USPS City
    Bethel Island
    Latitude
    38.0289° N
    Longitude
    121.6405° W
    Land Area
    5.3 sq mi
    Water Area
    0.6 sq mi

    ZIP Code 94511 Map

    Coordinates: 38.0289°N, 121.6405°W

    ZIP Code 94511 Demographics

    Population

    Total Population1,993
    Density376/sq mi
    Median Age55.4
    Male / Female53.4% / 46.6%

    Income & Economy

    Median Household$85,870
    Per Capita$47,884
    Poverty Rate17.8%
    Unemployment17%

    Housing

    Total Units1,101
    Owner-Occupied73.2%
    Renter-Occupied26.8%
    Median Home Value$475,400
    Median Rent$1,369

    Education

    High School Grad85.7%
    Bachelor's Degree25%

    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 94511 in Context

    The median home in 94511 is valued at $475,400 against a median household income of $85,870, 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 Contra Costa County, 94511 ranks 6 of 40 ZIPs on affordability (1 = lowest ratio); the county median ratio is 6.8. Renting takes 19.1% of median household income (median rent $1,369 a month), under the 30% cost-burden threshold.

    94511 ranks 799 of 1,558 statewide on median household income and 973 of 1,558 on median home value; its income is below the $120,565 Contra Costa County median. 73% 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 17.8%, far above the 10.8% statewide ZIP median. Unemployment stands at 17.0%.

    With 376 residents per square mile across 5.3 square miles of land, 94511 is far less dense than the statewide ZIP median of 1,120 (rank 948 of 1,558). This is a low-density pattern of large lots, small towns or scattered subdivisions.

    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 94511 primarily serves Bethel Island in Contra Costa County, California.

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