ZIP Code 13640 — Wellesley Island, New York

    📍 ZIP code 13640 is in Wellesley Island, Jefferson County, New York.

    ZIP code 13640 is located in Wellesley Island, Jefferson County, New York. It is a standard zip code in the Eastern Time Zone with an estimated population of 305. The area code for zip code 13640 is 315.

    ZIP
    13640
    City
    Wellesley Island
    County
    Jefferson County
    State
    New York
    Time Zone
    Eastern
    Area Code
    315
    Type
    Standard
    USPS City
    Wellesley Island
    Latitude
    44.3327° N
    Longitude
    75.9902° W
    Land Area
    12.3 sq mi
    Water Area
    6.6 sq mi

    ZIP Code 13640 Map

    Coordinates: 44.3327°N, 75.9902°W

    ZIP Code 13640 Demographics

    Population

    Total Population305
    Density25/sq mi
    Median Age65.4
    Male / Female47.5% / 52.5%

    Income & Economy

    Median Household$92,422
    Per Capita$46,091
    Poverty Rate3.8%
    Unemployment28.9%

    Housing

    Total Units810
    Owner-Occupied100%
    Renter-Occupied0%
    Median Home Value$330,500
    Median Rent$0

    Education

    High School Grad100%
    Bachelor's Degree58.6%

    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 13640 in Context

    The median home in 13640 is valued at $330,500 against a median household income of $92,422, a price-to-income ratio of 3.6. 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 Jefferson County, 13640 ranks 30 of 33 ZIPs on affordability (1 = lowest ratio); the county median ratio is 2.7.

    13640 ranks 551 of 1,572 statewide on median household income and 562 of 1,572 on median home value; its income is above the $75,673 Jefferson County median. 100% of households own their home, above the 80% statewide ZIP median, making this a majority-owner ZIP. 59% of adults hold a bachelor's degree or higher, far above the 31% median, and the poverty rate is 3.8%, far below the 9.9% statewide ZIP median and among the lowest in the state. Unemployment stands at 28.9%.

    With 25 residents per square mile across 12.3 square miles of land, 13640 is far less dense than the statewide ZIP median of 197 (rank 1,417 of 1,572). This is rural or open territory where most of the land is agricultural, forest, desert or public land.

    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 13640 primarily serves Wellesley Island in Jefferson County, New York.

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