Washington County 2019-01-30T09:24:47+00:00

Washington County

Washington County

155 N First Ave, Ste 300, MS 22
Hillsboro, OR 97124

(503) 846-8681

www.co.washington.or.us

Population: 606,280 (2018)

Square Miles: 727

Form of Government: Home Rule County

Year Established: 1843