| | Adair County | MO | 29001 | | Kirksville, MO 28860 | | Central | nonmetro county (rural) | federal/state
government-dependent | https://maps.google.com/?q=AdairCounty+MO |
| | Atchison County | MO | 29005 | | | | | nonmetro county (rural) | farm-dependent | https://maps.google.com/?q=AtchisonCounty+MO |
| | Audrain County | MO | 29007 | | Mexico, MO 33020 | Columbia-Jefferson
City-Moberly, MO 190 | Central | nonmetro county (rural) | nonspecialized | https://maps.google.com/?q=AudrainCounty+MO |
| | Barry County | MO | 29009 | | | | | nonmetro county (rural) | manufacturing-dependent | https://maps.google.com/?q=BarryCounty+MO |
| | Barton County | MO | 29011 | | | | | nonmetro county (rural) | nonspecialized | https://maps.google.com/?q=BartonCounty+MO |
| | Benton County | MO | 29015 | | | | | nonmetro county (rural) | recreation | https://maps.google.com/?q=BentonCounty+MO |
| | Butler County | MO | 29023 | | Poplar Bluff, MO 38740 | | Central | nonmetro county (rural) | nonspecialized | https://maps.google.com/?q=ButlerCounty+MO |
| | Camden County | MO | 29029 | | | | | nonmetro county (rural) | recreation | https://maps.google.com/?q=CamdenCounty+MO |
| | Carroll County | MO | 29033 | | | | | nonmetro county (rural) | farm-dependent | https://maps.google.com/?q=CarrollCounty+MO |
| | Carter County | MO | 29035 | | | | | nonmetro county (rural) | nonspecialized | https://maps.google.com/?q=CarterCounty+MO |