There are 23 zip codes in Washington County, Oregon. The most populated is 97229, located in Portland. * 2024 populations estimated based on the latest ACS 5-year data.

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Zip Code
Population
City
9722974,755Portland
9712454,493Hillsboro
9722350,027Portland
9700748,524Beaverton
9712348,218Hillsboro
9700645,090Beaverton
9722436,591Portland
9700829,832Beaverton
9711629,182Forest Grove
9706228,845Tualatin
9700328,639Beaverton
9714028,438Sherwood
9700527,543Beaverton
9722526,139Portland
9707824,790Beaverton
9711314,984Cornelius
971335,708North Plains
971195,398Gaston
971064,770Banks
97117866Gales Creek
97109553Buxton
97144111Timber
9712588Manning

Zip Codes in Washington County, Oregon by Population (2024)