Sonoma County California is covered by a total of 53 ZIP Codes. There are 5 ZIP Codes in Sonoma County that extend into adjacent counties (Lake County, Marin County, and Napa County). Of the ZIP codes within or partially within Sonoma County there are 34 Standard ZIP Codes, 1 Unique ZIP Codes and 17 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 Sonoma County and can be turned on and off. Each type of postal code can also be turned on and off.