There are 9 zip codes in San Juan County, Washington. The most populated is 98250, located in Friday Harbor. * 2024 populations estimated based on the latest ACS 5-year data.

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Zip Code
City
Population
98250Friday Harbor8,953
98245Eastsound4,088
98261Lopez Island3,112
98279Olga614
98280Orcas398
98243Deer Harbor297
98286Shaw Island158
98222Blakely Island117
98297Waldron55

San Juan County, Washington Zip Codes by Population (2024)