????–20??[]
|
UNKNOWN YEAR |
20??–present[]
|
|
UNKNOWN YEAR |
Municipalities of Washington County, Oregon
|
|---|
| Banks | Beaverton | Cornelius | Durham | Forest Grove | Gaston | Hillsboro | King City | Lake Oswego (part) | North Plains | Portland (part) | Rivergrove (part) | Sherwood | Tigard | Tualatin (part) | Wilsonville (part) |