Mason County Washington ZIP Codes - Map and Full List

Mason County Washington is covered by a total of 16 ZIP Codes. There are 7 ZIP Codes in Mason County that extend into adjacent counties (Grays Harbor County, Jefferson County, Kitsap County, and Thurston County). Of the ZIP codes within or partially within Mason County there are 15 Standard ZIP Codes.

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Mason County Washington ZIP Code Map

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 Mason County and can be turned on and off. Each type of postal code can also be turned on and off.

List of ZIP Codes in Mason County

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