| | Antelope County | NE | 31003 | | | | | nonmetro county (rural) | farm-dependent | https://maps.google.com/?q=AntelopeCounty+NE |
| | Arthur County | NE | 31005 | | | | | nonmetro county (rural) | farm-dependent | https://maps.google.com/?q=ArthurCounty+NE |
| | Blaine County | NE | 31009 | | | | | nonmetro county (rural) | federal/state
government-dependent | https://maps.google.com/?q=BlaineCounty+NE |
| | Boone County | NE | 31011 | | | | | nonmetro county (rural) | farm-dependent | https://maps.google.com/?q=BooneCounty+NE |
| | Box Butte County | NE | 31013 | | | | | nonmetro county (rural) | nonspecialized | https://maps.google.com/?q=BoxButteCounty+NE |
| | Boyd County | NE | 31015 | | | | | nonmetro county (rural) | farm-dependent | https://maps.google.com/?q=BoydCounty+NE |
| | Brown County | NE | 31017 | | | | | nonmetro county (rural) | farm-dependent | https://maps.google.com/?q=BrownCounty+NE |
| | Burt County | NE | 31021 | | | | | nonmetro county (rural) | farm-dependent | https://maps.google.com/?q=BurtCounty+NE |
| | Butler County | NE | 31023 | | | | | nonmetro county (rural) | farm-dependent | https://maps.google.com/?q=ButlerCounty+NE |
| | Cedar County | NE | 31027 | | | | | nonmetro county (rural) | farm-dependent | https://maps.google.com/?q=CedarCounty+NE |