| | 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 |
| | Wheeler County | OR | 41069 | | | | | nonmetro county (rural) | farm-dependent | https://maps.google.com/?q=WheelerCounty+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 |
| | Grant County | OR | 41023 | | | | | nonmetro county (rural) | federal/state
government-dependent | https://maps.google.com/?q=GrantCounty+OR |
| | Harney County | OR | 41025 | | | | | nonmetro county (rural) | federal/state
government-dependent | https://maps.google.com/?q=HarneyCounty+OR |
| | Lake County | OR | 41037 | | | | | nonmetro county (rural) | federal/state
government-dependent | https://maps.google.com/?q=LakeCounty+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 |
| | Marion County | OR | 41047 | | Salem, OR 41420 | Portland-Vancouver-Salem,
OR-WA 440 | Central | metro county (urban) | federal/state
government-dependent | https://maps.google.com/?q=MarionCounty+OR |
| | Union County | OR | 41061 | | La Grande, OR 29260 | | Central | nonmetro county (rural) | federal/state
government-dependent | https://maps.google.com/?q=UnionCounty+OR |