ZIP Code 11783 — Seaford, New York

    📍 ZIP code 11783 is in Seaford, Nassau County, New York.

    ZIP code 11783 is located in Seaford, Nassau County, New York. It is a standard zip code in the Eastern Time Zone with an estimated population of 21,588. The area code for zip code 11783 is 516.

    ZIP
    11783
    City
    Seaford
    County
    Nassau County
    State
    New York
    Time Zone
    Eastern
    Area Code
    516
    Type
    Standard
    USPS City
    Seaford
    Latitude
    40.6776° N
    Longitude
    73.4900° W
    Land Area
    3.5 sq mi
    Water Area
    0 sq mi

    ZIP Code 11783 Map

    Coordinates: 40.6776°N, 73.4900°W

    ZIP Code 11783 Demographics

    Population

    Total Population21,588
    Density6,168/sq mi
    Median Age41.4
    Male / Female51.2% / 48.8%

    Income & Economy

    Median Household$164,128
    Per Capita$62,392
    Poverty Rate2.9%
    Unemployment4.8%

    Housing

    Total Units7,320
    Owner-Occupied93.3%
    Renter-Occupied6.7%
    Median Home Value$626,700
    Median Rent$2,806

    Education

    High School Grad96.4%
    Bachelor's Degree45.8%

    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 11783 in Context

    The median home in 11783 is valued at $626,700 against a median household income of $164,128, a price-to-income ratio of 3.8. That is above the 2.9 median across the 1,572 New York ZIP codes with published housing data, and past the 3.0 ratio that marks an attainable market nationally. Within Nassau County, 11783 ranks 5 of 67 ZIPs on affordability (1 = lowest ratio); the county median ratio is 4.9. Renting takes 20.5% of median household income (median rent $2,806 a month), under the 30% cost-burden threshold.

    11783 ranks 82 of 1,572 statewide on median household income and 272 of 1,572 on median home value; its income is above the $149,250 Nassau County median. 93% of households own their home, above the 80% statewide ZIP median, making this a majority-owner ZIP. 46% of adults hold a bachelor's degree or higher, above the 31% median, and the poverty rate is 2.9%, far below the 9.9% statewide ZIP median and among the lowest in the state. Unemployment stands at 4.8%.

    With 6,168 residents per square mile across 3.5 square miles of land, 11783 is far denser than the statewide ZIP median of 197 (rank 244 of 1,572). This is predominantly single-family residential with suburban street patterns.

    Ratios and ranks are computed from the ACS figures above across the 1,572 New York ZIP codes with published housing data. See the 2026 New York affordability report for the statewide analysis and the methodology for definitions.

    Nearby Zip Codes

    Cities & Places Served

    ZIP code 11783 primarily serves Seaford in Nassau County, New York.

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