Long Island ZIP Codes: Nassau and Suffolk Counties

177 ZIP code areas: 70 in Nassau County and 108 in Suffolk County. That counts every ZIP code the U.S. Census Bureau maps as an area (its 2020 ZIP Code Tabulation Areas). Post-office-box ZIP codes and ZIP codes assigned to a single building or organization deliver mail but cover no area, so they are not in the count.

11001 (Nassau County and Queens), 11040 (Nassau County and Queens) and 11735 (Nassau County and Suffolk County). A shared ZIP code is listed under each county it reaches, with only that county’s part described. The street address, not the ZIP code, decides which county a home is in, and so which county’s property tax and records apply.

No. A ZIP code is a mail-delivery route drawn by the Postal Service, so one ZIP code can include several villages and hamlets and one village or hamlet can be split across several ZIP codes: Woodmere, for example, is part of 4 Nassau ZIP codes. The mailing name on an address is the post office’s name, which may differ from the village or hamlet the home is actually in.

Not always. 22 of the 178 Nassau and Suffolk ZIP code listings take in parts of two or more towns or cities, and a ZIP code’s mailing name is often a hamlet inside a larger town. The town decides building permits, and with the county, the property tax bill; check the address itself.

Our Long Island home prices by ZIP code page gives the median sale price for every ZIP code with sales over the last 12 months, from MLS closed sales. Each row in the list above links to its ZIP code on that page.