Essex County Massachusetts is covered by a total of 56 ZIP Codes. There are 1 ZIP Codes in Essex County that extend into adjacent counties ( and Rockingham County). Of the ZIP codes within or partially within Essex County there are 41 Standard ZIP Codes, 4 Unique ZIP Codes and 10 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 Essex County and can be turned on and off. Each type of postal code can also be turned on and off.