Nassau County New York is covered by a total of 90 ZIP Codes. There are 2 ZIP Codes in Nassau County that extend into adjacent counties ( and Suffolk County). Of the ZIP codes within or partially within Nassau County there are 68 Standard ZIP Codes, 10 Unique ZIP Codes and 11 PO Box ZIP Codes.
Click on the ZIP Codes in the interactive map to view more information. The map control in the upper right corner can be used to toggle map layers on and off. The red outline is the border of Nassau County and can be turned on and off. Each type of postal code can also be turned on and off.