Washington County
| Use attributes for filter ! | |
| Area | 1880 |
|---|---|
| Population | 588,957 (2017) |
| County seat | Hillsboro |
| Did you know | Washington is the second-highest-income Oregon location by per capita income ($30,522). |
| Date of Reg. | |
| Date of Upd. | |
| ID | 909459 |
About Washington County
Washington County is one of 36 counties in the U. S. state of Oregon. As of the 2010 census, the population was 529,710, making it the state's second most populous county. The county seat and largest city is Hillsboro. Washington County is part of the Portland-Vancouver-Hillsboro, OR-WA Metropolitan Statistical Area.
