| | | Adams County | WA | 53001 | | Othello, WA 36830 | Moses Lake-Othello, WA 393 | Central | nonmetro county (rural) | farm-dependent | https://maps.google.com/?q=AdamsCounty+WA |
| | | Asotin County | WA | 53003 | | Lewiston, ID-WA 30300 | | Central | metro county (urban) | nonspecialized | https://maps.google.com/?q=AsotinCounty+WA |
| | | Benton County | WA | 53005 | | Kennewick-Richland, WA 28420 | Kennewick-Richland-Walla
Walla, WA 314 | Central | metro county (urban) | nonspecialized | https://maps.google.com/?q=BentonCounty+WA |
| | | Chelan County | WA | 53007 | | Wenatchee-East Wenatchee,
WA 48300 | | Central | metro county (urban) | recreation | https://maps.google.com/?q=ChelanCounty+WA |
| | | Clallam County | WA | 53009 | | Port Angeles, WA 38820 | | Central | nonmetro county (rural) | nonspecialized | https://maps.google.com/?q=ClallamCounty+WA |
| | | Clark County | WA | 53011 | | Portland-Vancouver-Hillsboro,
OR-WA 38900 | Portland-Vancouver-Salem,
OR-WA 440 | Central | metro county (urban) | nonspecialized | https://maps.google.com/?q=ClarkCounty+WA |
| | | Columbia County | WA | 53013 | | | | | metro county (urban) | farm-dependent | https://maps.google.com/?q=ColumbiaCounty+WA |
| | | Cowlitz County | WA | 53015 | | Longview-Kelso, WA 31020 | Portland-Vancouver-Salem,
OR-WA 440 | Central | metro county (urban) | nonspecialized | https://maps.google.com/?q=CowlitzCounty+WA |
| | | Douglas County | WA | 53017 | | Wenatchee-East Wenatchee,
WA 48300 | | Central | metro county (urban) | farm-dependent | https://maps.google.com/?q=DouglasCounty+WA |
| | | Ferry County | WA | 53019 | | | | | nonmetro county (rural) | federal/state
government-dependent | https://maps.google.com/?q=FerryCounty+WA |
