ZIP Code 91942 — La Mesa, California

    📍 ZIP code 91942 is in La Mesa, San Diego County, California.

    ZIP code 91942 is located in La Mesa, San Diego County, California. It is a standard zip code in the Pacific Time Zone with an estimated population of 40,995. The area code for zip code 91942 is 619.

    ZIP
    91942
    City
    La Mesa
    County
    San Diego County
    State
    California
    Time Zone
    Pacific
    Area Code
    619
    Type
    Standard
    USPS City
    La Mesa
    Latitude
    32.7780° N
    Longitude
    117.0215° W
    Land Area
    5.8 sq mi
    Water Area
    0 sq mi

    ZIP Code 91942 Map

    Coordinates: 32.7780°N, 117.0215°W

    ZIP Code 91942 Demographics

    Population

    Total Population40,995
    Density7,068/sq mi
    Median Age36.4
    Male / Female46.8% / 53.2%

    Income & Economy

    Median Household$80,996
    Per Capita$43,521
    Poverty Rate11.8%
    Unemployment6.8%

    Housing

    Total Units18,387
    Owner-Occupied43%
    Renter-Occupied57%
    Median Home Value$645,500
    Median Rent$1,809

    Education

    High School Grad93.2%
    Bachelor's Degree37.6%

    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 91942 in Context

    The median home in 91942 is valued at $645,500 against a median household income of $80,996, a price-to-income ratio of 8.0. That is 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, so buying here on a local median income requires substantial savings or a second income. Within San Diego County, 91942 ranks 62 of 94 ZIPs on affordability (1 = lowest ratio); the county median ratio is 7.4. Renting takes 26.8% of median household income (median rent $1,809 a month), under the 30% cost-burden threshold.

    91942 ranks 878 of 1,558 statewide on median household income and 696 of 1,558 on median home value; its income is below the $98,033 San Diego County median. 43% of households own their home, below the 64% statewide ZIP median, so most residents rent. 38% of adults hold a bachelor's degree or higher, above the 31% median, and the poverty rate is 11.8%, above the 10.8% statewide ZIP median. Unemployment stands at 6.8%.

    With 7,068 residents per square mile across 5.8 square miles of land, 91942 is far denser than the statewide ZIP median of 1,120 (rank 291 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 91942 primarily serves La Mesa in San Diego County, California.

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