Belfair, WA is a city located in Mason County, Washington and has a land area of 72.29 square miles (187.23 km2). The water area for the city is 12.54 square miles or 32.48 km2. There is one unique zip code in Belfair, Washington and it is 98528. The area code(s) for Belfair is 360/564.
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