| | 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 |
| | Crook County | OR | 41013 | | Bend, OR 13460 | | Outlying | nonmetro county (rural) | nonspecialized | https://maps.google.com/?q=CrookCounty+Oregon |
| | Jefferson County | OR | 41031 | | Bend, OR 13460 | | Outlying | nonmetro county (rural) | nonspecialized | https://maps.google.com/?q=JeffersonCounty+OR |
| | Morrow County | OR | 41049 | | Hermiston-Pendleton, OR 25840 | | Outlying | nonmetro county (rural) | farm-dependent | https://maps.google.com/?q=MorrowCounty+OR |
| | Yamhill County | OR | 41071 | | Portland-Vancouver-Hillsboro,
OR-WA 38900 | Portland-Vancouver-Salem,
OR-WA 440 | Outlying | metro county (urban) | nonspecialized | https://maps.google.com/?q=YamhillCounty+OR |
| | Baker County | OR | 41001 | | Baker City, OR 12520 | | Central | nonmetro county (rural) | recreation | https://maps.google.com/?q=BakerCounty+OR |
| | Benton County | OR | 41003 | | Corvallis, OR 18700 | Portland-Vancouver-Salem,
OR-WA 440 | Central | metro county (urban) | federal/state
government-dependent | https://maps.google.com/?q=BentonCounty+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 |
| | Clatsop County | OR | 41007 | | Astoria, OR 11820 | | Central | nonmetro county (rural) | recreation | https://maps.google.com/?q=ClatsopCounty+OR |
| | Coos County | OR | 41011 | | Coos Bay-North Bend, OR 18300 | | Central | nonmetro county (rural) | nonspecialized | https://maps.google.com/?q=CoosCounty+OR |