Assessment & Taxation

The responsibilities of the Department of Assessment and Taxation include appraisal and assessment of property; collection of property taxes for all taxing entities; recording documents, land plats, issuing marriage licenses, records retention and administration of Elections.

Assessment and Taxation is located at 161 NW Adams Avenue, Hillsboro, OR 97124. Mailing address is 155 N First Avenue, Suite 230, Hillsboro, OR 97124.

Adams Crossing


The Washington County passport office will be closed November 8-15, 2017. For other locations visit here.

Property Tax Statement

Many of you will be receiving your annual Property Tax Statement on or before October 25, 2017.  Payment for taxes are due on or before November 15, 2017.  Payments must be POSTMARKED on or before November 15, 2017.  Please return the lower portion of your tax bill(s) with payment in the enclosed envelope.

Due to reduced office space, taxpayers are encouraged to mail payments, use drop boxes, or pay electronically. 

Payment Drop Box

Two drop boxes are located at the Adams Crossing Building, 161 NW Adams Ave., Hillsboro. The 24 hour drop box site is located at the North side of the building; the other drop box site is available Monday through Friday 8:30 am - 5:00 pm, located in the Adams Crossing Building hallway outside Room 102.

For general tax questions, please see Property Tax Questions.  If you are looking for specific tax data relevant to your property, please call our office at 503-846-8741.

Mail Payment

Property Tax Payment Center
PO Box 3587
Portland, OR 97208-3587


Washington County
Assessment & Taxation 
155 N First Avenue, Suite 130 MS8
Hillsboro, OR 97124


Pay Taxes Online