Fairfax County Virginia is covered by a total of 83 ZIP Codes. There are 9 ZIP Codes in Fairfax County that extend into adjacent counties (City of Alexandria, City of Fairfax, City of Falls Church, and Loudoun County). Of the ZIP codes within or partially within Fairfax County there are 50 Standard ZIP Codes, 19 Unique ZIP Codes and 14 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 Fairfax County and can be turned on and off. Each type of postal code can also be turned on and off.