| | Jefferson County | OR | 41031 | | Bend, OR 13460 | | Outlying | nonmetro county (rural) | nonspecialized | https://maps.google.com/?q=JeffersonCounty+OR |
| | Klamath County | OR | 41035 | | Klamath Falls, OR 28900 | | Central | nonmetro county (rural) | nonspecialized | https://maps.google.com/?q=KlamathCounty+OR |
| | Lake County | OR | 41037 | | | | | nonmetro county (rural) | federal/state
government-dependent | https://maps.google.com/?q=LakeCounty+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 |
| | Morrow County | OR | 41049 | | Hermiston-Pendleton, OR 25840 | | Outlying | nonmetro county (rural) | farm-dependent | https://maps.google.com/?q=MorrowCounty+OR |
| | Sherman County | OR | 41055 | | | | | nonmetro county (rural) | farm-dependent | https://maps.google.com/?q=ShermanCounty+OR |
| | Tillamook County | OR | 41057 | | | | | nonmetro county (rural) | recreation | https://maps.google.com/?q=TillamookCounty+OR |
| | Umatilla County | OR | 41059 | | Hermiston-Pendleton, OR 25840 | | Central | nonmetro county (rural) | nonspecialized | https://maps.google.com/?q=UmatillaCounty+OR |
| | Union County | OR | 41061 | | La Grande, OR 29260 | | Central | nonmetro county (rural) | federal/state
government-dependent | https://maps.google.com/?q=UnionCounty+OR |