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Assessment and Taxation

We can help you understand the county's appraisal and assessment of your property, paying your property taxes, getting a marriage license, passports, recording documents, mapping, and many other services.

Featured Services

Welcome to the Washington County Department of Assessment & Taxation. We’re here to serve our communities by making it simple and straightforward to get the services you need when you need them.

Our lobbies are open. We, however, continue to encourage the public to use the alternate options of phone, e-mail, USPS, online, or drop box.

Please call us at one of the numbers listed to discuss your service needs:  


Department of Assessment & Taxation

155 N First Avenue
Hillsboro, Oregon 97124


Temporary closure at Assessment & Taxation; Elections offices

We apologize for the inconvenience, but on Wednesday, September 20, 2023, our Assessment & Taxation and Election offices will be closed for a select time for a staff meeting.