Hunterdon County New Jersey is covered by a total of 33 ZIP Codes. There are 10 ZIP Codes in Hunterdon County that extend into adjacent counties (Mercer County, Morris County, Somerset County, and Warren County). Of the ZIP codes within or partially within Hunterdon County there are 23 Standard ZIP Codes and 9 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 Hunterdon County and can be turned on and off. Each type of postal code can also be turned on and off.