Shasta County California is covered by a total of 35 ZIP Codes. There are 6 ZIP Codes in Shasta County that extend into adjacent counties (Lassen County, Modoc County, Siskiyou County, Tehama County, and Trinity County). Of the ZIP codes within or partially within Shasta County there are 25 Standard ZIP Codes and 9 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 Shasta County and can be turned on and off. Each type of postal code can also be turned on and off.