2026 Property Tax Due Dates
November 15
Full (3% discount) or first third
May 15
Third installment
Payment Methods
Online, Mail, In-Person
Washington County Treasurer
How to Pay
Online
Pay using credit card or e-check
By Mail
Mail check payable to Washington County Treasurer
In Person
Visit the Treasurer's office — 155 N First Ave, Suite 130, Hillsboro OR 97124, Mon-Fri 8am - 5pm
About Washington County
Washington County is one of 36 counties in the U.S. state of Oregon and part of the Portland metropolitan area. The 2020 census recorded the population as 600,372, making it the second most populous county in the state and the most populous "Washington County" in the United States. Hillsboro is the county seat and largest city, while other major cities include Beaverton, Tigard, Cornelius, Banks, Gaston, Sherwood, North Plains, and Forest Grove, the county's oldest city.
Source: Wikipedia — content available under CC BY-SA 4.0
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Due dates shown are for reference only. Contact your county treasurer's office to confirm official deadlines before making payments.