New Haven County Connecticut is covered by a total of 78 ZIP Codes. Of the ZIP codes within or partially within New Haven County there are 42 Standard ZIP Codes, 9 Unique ZIP Codes and 27 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 New Haven County and can be turned on and off. Each type of postal code can also be turned on and off.