San Diego County California is covered by a total of 183 ZIP Codes. There are 3 ZIP Codes in San Diego County that extend into adjacent counties (Orange County, and Riverside County). Of the ZIP codes within or partially within San Diego County there are 98 Standard ZIP Codes, 16 Unique ZIP Codes and 69 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 San Diego County and can be turned on and off. Each type of postal code can also be turned on and off.