ZIP Code 11724 — Cold Spring Harbor, New York

    📍 ZIP code 11724 is in Cold Spring Harbor, Suffolk County, New York.

    ZIP code 11724 is located in Cold Spring Harbor, Suffolk County, New York. It is a standard zip code in the Eastern Time Zone with an estimated population of 2,956. The area code for zip code 11724 is 631.

    ZIP
    11724
    City
    Cold Spring Harbor
    County
    Suffolk County
    State
    New York
    Time Zone
    Eastern
    Area Code
    631
    Type
    Standard
    USPS City
    Cold Spring Harbor
    Latitude
    40.8643° N
    Longitude
    73.4564° W
    Land Area
    3.9 sq mi
    Water Area
    0.5 sq mi

    ZIP Code 11724 Map

    Coordinates: 40.8643°N, 73.4564°W

    ZIP Code 11724 Demographics

    Population

    Total Population2,956
    Density758/sq mi
    Median Age40.2
    Male / Female52.9% / 47.1%

    Income & Economy

    Median Household$250,001
    Per Capita$94,955
    Poverty Rate2.5%
    Unemployment1.6%

    Housing

    Total Units1,059
    Owner-Occupied94.8%
    Renter-Occupied5.2%
    Median Home Value$1,571,600
    Median Rent$2,692

    Education

    High School Grad97.7%
    Bachelor's Degree80.1%

    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 11724 in Context

    The median home in 11724 is valued at $1,571,600 against a median household income of more than $250,000 (the Census reporting ceiling), a price-to-income ratio of 6.3. That is far above the 2.9 median across the 1,572 New York 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 Suffolk County, 11724 ranks 75 of 95 ZIPs on affordability (1 = lowest ratio); the county median ratio is 4.2. Renting takes 12.9% of median household income (median rent $2,692 a month), under the 30% cost-burden threshold.

    11724 ranks 1 of 1,572 statewide on median household income and 20 of 1,572 on median home value; its income is far above the $128,844 Suffolk County median. 95% of households own their home, above the 80% statewide ZIP median, making this a majority-owner ZIP. 80% of adults hold a bachelor's degree or higher, far above the 31% median, and the poverty rate is 2.5%, far below the 9.9% statewide ZIP median and among the lowest in the state. Unemployment stands at 1.6%.

    With 758 residents per square mile across 3.9 square miles of land, 11724 is far denser than the statewide ZIP median of 197 (rank 548 of 1,572). 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 1,572 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 11724 primarily serves Cold Spring Harbor in Suffolk County, New York.

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