GIS & Cartography

The GIS / Cartography staff is responsible for tracking ownership of all real property in the County and maintaining a complete set of taxlot maps which adhere to state cadastral mapping standards.  Most documents recorded in the County are reviewed by Cartography to determine if they involve a change in property ownership or property boundary.

Washington County
Assessment & Taxation Department
Cartography Division
155 N First Avenue, Suite 230
Hillsboro, OR  97124

Phone:  (503) 846-8871
Fax:  (503) 846-3908
E-Mail to:  at@co.washington.or.us