Worcester County Massachusetts is covered by a total of 101 ZIP Codes. There are 4 ZIP Codes in Worcester County that extend into adjacent counties (Franklin County, Hampden County, Hampshire County, and Middlesex County). Of the ZIP codes within or partially within Worcester County there are 79 Standard ZIP Codes, 3 Unique ZIP Codes and 18 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 Worcester County and can be turned on and off. Each type of postal code can also be turned on and off.