Islip NY ZIP Code
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Islip city is located in New York State, Suffolk County and has a unique zip code assigned by the US Postal Service Office.
You can search for the Islip NY zip code by its streets and block numbers if we have some of the Islip streets loaded in our website
Islip Area Code is 631 and Time Zone is Eastern (GMT -05:00).
Islip Zip Code - New York
The US ZIP Code basic format consists of five decimal numerical digits assigned to the Islip City. An extended ZIP+4 code, introduced in the 1980s, includes the five digits of the Islip ZIP code, a hyphen, and four more digits that determine a more specific location within a given ZIP code in Islip, New York.
The Islip Zip Code is 11751.
If you want to send a mail to Islip City, you should use the 11751 Zip Code.
In 1983, the U.S. Postal Service introduced an expanded Islip ZIP code system that it called ZIP+4, often called "plus-four codes", "add-on codes", or "add ons". A ZIP+4 code uses the basic 11751 Zip code plus four additional digits to identify a geographic segment within the five-digit delivery area, such as a Islip city block, a group of apartments, an individual high-volume receiver of mail or any other unit that could use an extra identifier to aid in efficient mail sorting and delivery in New York.