Chester County Pennsylvania is covered by a total of 68 ZIP Codes. There are 12 ZIP Codes in Chester County that extend into adjacent counties (Berks County, Delaware County, Lancaster County, and Montgomery County). Of the ZIP codes within or partially within Chester County there are 34 Standard ZIP Codes, 5 Unique ZIP Codes and 29 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 Chester County and can be turned on and off. Each type of postal code can also be turned on and off.