ZIP Code 90731 — San Pedro, California

    📍 ZIP code 90731 is in San Pedro, Los Angeles County, California.

    ZIP code 90731 is located in San Pedro, Los Angeles County, California. It is a standard zip code in the Pacific Time Zone with an estimated population of 63,431. The area code for zip code 90731 is 310.

    ZIP
    90731
    City
    San Pedro
    County
    Los Angeles County
    State
    California
    Time Zone
    Pacific
    Area Code
    310
    Type
    Standard
    USPS City
    San Pedro
    Latitude
    33.7314° N
    Longitude
    118.2789° W
    Land Area
    9.3 sq mi
    Water Area
    5.5 sq mi

    ZIP Code 90731 Map

    Coordinates: 33.7314°N, 118.2789°W

    ZIP Code 90731 Demographics

    Population

    Total Population63,431
    Density6,821/sq mi
    Median Age38.1
    Male / Female50.9% / 49.1%

    Income & Economy

    Median Household$69,019
    Per Capita$36,599
    Poverty Rate15.3%
    Unemployment6.6%

    Housing

    Total Units24,473
    Owner-Occupied33.9%
    Renter-Occupied66.1%
    Median Home Value$751,400
    Median Rent$1,606

    Education

    High School Grad80.9%
    Bachelor's Degree24.6%

    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 90731 in Context

    The median home in 90731 is valued at $751,400 against a median household income of $69,019, a price-to-income ratio of 10.9. 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 Los Angeles County, 90731 ranks 196 of 275 ZIPs on affordability (1 = lowest ratio); the county median ratio is 9.2. Renting takes 27.9% of median household income (median rent $1,606 a month), under the 30% cost-burden threshold.

    90731 ranks 1,089 of 1,558 statewide on median household income and 540 of 1,558 on median home value; its income is below the $87,339 Los Angeles County median. 34% of households own their home, below the 64% statewide ZIP median, so most residents rent. 25% of adults hold a bachelor's degree or higher, below the 31% median, and the poverty rate is 15.3%, above the 10.8% statewide ZIP median. Unemployment stands at 6.6%.

    With 6,821 residents per square mile across 9.3 square miles of land, 90731 is far denser than the statewide ZIP median of 1,120 (rank 313 of 1,558). This is predominantly single-family residential with suburban street patterns.

    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 90731 primarily serves San Pedro in Los Angeles County, California.

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