| | Platte County | NE | 31141 | | Columbus, NE 18100 | | Central | nonmetro county (rural) | manufacturing-dependent | https://maps.google.com/?q=PlatteCounty+NE |
| | Polk County | NE | 31143 | | | | | nonmetro county (rural) | farm-dependent | https://maps.google.com/?q=PolkCounty+NE |
| | Red Willow County | NE | 31145 | | | | | nonmetro county (rural) | nonspecialized | https://maps.google.com/?q=RedWillowCounty+NE |
| | Richardson County | NE | 31147 | | | | | nonmetro county (rural) | farm-dependent | https://maps.google.com/?q=RichardsonCounty+NE |
| | Rock County | NE | 31149 | | | | | nonmetro county (rural) | farm-dependent | https://maps.google.com/?q=RockCounty+NE |
| | Saline County | NE | 31151 | | | | | nonmetro county (rural) | manufacturing-dependent | https://maps.google.com/?q=SalineCounty+NE |
| | Sarpy County | NE | 31153 | | Omaha, NE-IA 36540 | Omaha-Fremont, NE-IA 420 | Central | metro county (urban) | nonspecialized | https://maps.google.com/?q=SarpyCounty+NE |
| | Saunders County | NE | 31155 | | Omaha, NE-IA 36540 | Omaha-Fremont, NE-IA 420 | Outlying | metro county (urban) | nonspecialized | https://maps.google.com/?q=SaundersCounty+NE |
| | Scotts Bluff County | NE | 31157 | | Scottsbluff, NE 42420 | | Central | nonmetro county (rural) | nonspecialized | https://maps.google.com/?q=ScottsBluffCounty+NE |
| | Seward County | NE | 31159 | | Lincoln, NE 30700 | Lincoln-Beatrice, NE 339 | Outlying | metro county (urban) | nonspecialized | https://maps.google.com/?q=SewardCounty+NE |