There are 16 zip codes in Whatcom County, Washington. The most populated is 98225, located in Bellingham. * 2024 populations estimated based on the latest ACS 5-year data.

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Zip Code
City
Population
98225Bellingham49,667
98226Bellingham45,703
98229Bellingham34,157
98248Ferndale27,147
98264Lynden22,334
98230Blaine18,605
98247Everson8,468
98266Maple Falls3,983
98240Custer3,426
98244Deming3,284
98295Sumas3,033
98276Nooksack1,564
98281Point Roberts1,249
98262Lummi Island965
98220Acme577
98283Rockport466

Whatcom County, Washington Zip Codes by Population (2024)