Onondaga County New York is covered by a total of 70 ZIP Codes. There are 16 ZIP Codes in Onondaga County that extend into adjacent counties (Cayuga County, Chenango County, Cortland County, Madison County, and Oswego County). Of the ZIP codes within or partially within Onondaga County there are 50 Standard ZIP Codes, 5 Unique ZIP Codes and 15 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 Onondaga County and can be turned on and off. Each type of postal code can also be turned on and off.