Mason County, Washington ZIP Codes

Zip Code
City
Population ↓
98584Shelton40,606
98528Belfair11,940
98524Allyn4,300
98546Grapeview2,430
98548Hoodsport2,177
98588Tahuya2,114
98592Union2,059
98555Lilliwaup324
98560Matlock114

Overview of ZIP Codes in Mason County

ZCTAs are geographic areas created by the US Census Bureau to approximate the delivery areas of ZIP Codes for statistical analysis. While ZCTAs use the same five-digit codes as ZIP Codes, they represent defined geographic areas that may not exactly match the mail delivery routes of ZIP Codes.
9
ZIP Codes

The data shown reflect ZCTAs from the US Census. As of 2025, there are 9 ZCTAs in Mason County, Washington (US Census).

Sources

  1. US Census: 2025 Gazetteer Files
  2. US Census: ZIP Code Tabulation Areas (ZCTAs)

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