There are 13 zip codes in Skagit County, Washington. The most populated is 98273, located in Mount Vernon. * 2024 populations estimated based on the latest ACS 5-year data.

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Zip Code
City
Population
98273Mount Vernon30,430
98284Sedro Woolley27,688
98221Anacortes22,969
98274Mount Vernon18,360
98233Burlington16,952
98237Concrete4,979
98257La Conner4,484
98232Bow3,939
98235Clearlake570
98255Hamilton312
98263Lyman178
98267Marblemount160
98238Conway45

Skagit County, Washington Zip Codes by Population (2024)