Mercer County New Jersey ZIP Codes - Map and Full List

Mercer County New Jersey is covered by a total of 42 ZIP Codes. There are 10 ZIP Codes in Mercer County that extend into adjacent counties (Burlington County, Hunterdon County, Middlesex County, Monmouth County, and Somerset County). Of the ZIP codes within or partially within Mercer County there are 23 Standard ZIP Codes, 7 Unique ZIP Codes and 11 PO Box ZIP Codes.

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Mercer County New Jersey ZIP Code Map

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 Mercer County and can be turned on and off. Each type of postal code can also be turned on and off.

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