| | | Umatilla County | OR | 41059 | | Hermiston-Pendleton, OR 25840 | | Central | nonmetro county (rural) | nonspecialized | https://maps.google.com/?q=UmatillaCounty+OR |
| | | Hood River County | OR | 41027 | | Hood River, OR 26220 | | Central | nonmetro county (rural) | recreation | https://maps.google.com/?q=HoodRiverCounty+OR |
| | | Klamath County | OR | 41035 | | Klamath Falls, OR 28900 | | Central | nonmetro county (rural) | nonspecialized | https://maps.google.com/?q=KlamathCounty+OR |
| | | Union County | OR | 41061 | | La Grande, OR 29260 | | Central | nonmetro county (rural) | federal/state
government-dependent | https://maps.google.com/?q=UnionCounty+OR |
| | | Jackson County | OR | 41029 | | Medford, OR 32780 | Medford-Grants Pass, OR 366 | Central | metro county (urban) | nonspecialized | https://maps.google.com/?q=JacksonCounty+OR |
| | | Lincoln County | OR | 41041 | | Newport, OR 35440 | | Central | nonmetro county (rural) | recreation | https://maps.google.com/?q=LincolnCounty+OR |
| | | Malheur County | OR | 41045 | | Ontario, OR-ID 36620 | Boise City-Mountain
Home-Ontario, ID-OR 147 | Central | nonmetro county (rural) | federal/state
government-dependent | https://maps.google.com/?q=MalheurCounty+OR |
| | | Clackamas County | OR | 41005 | | Portland-Vancouver-Hillsboro,
OR-WA 38900 | Portland-Vancouver-Salem,
OR-WA 440 | Central | metro county (urban) | nonspecialized | https://maps.google.com/?q=ClackamasCounty+OR |
| | | Columbia County | OR | 41009 | | Portland-Vancouver-Hillsboro,
OR-WA 38900 | Portland-Vancouver-Salem,
OR-WA 440 | Outlying | metro county (urban) | nonspecialized | https://maps.google.com/?q=ColumbiaCounty+OR |
| | | Multnomah County | OR | 41051 | | Portland-Vancouver-Hillsboro,
OR-WA 38900 | Portland-Vancouver-Salem,
OR-WA 440 | Central | metro county (urban) | nonspecialized | https://maps.google.com/?q=MultnomahCounty+OR |
