| | Cedar County | MO | 29039 | | | | | nonmetro county (rural) | nonspecialized | https://maps.google.com/?q=CedarCounty+MO |
| | Chariton County | MO | 29041 | | | | | nonmetro county (rural) | farm-dependent | https://maps.google.com/?q=CharitonCounty+MO |
| | Clark County | MO | 29045 | | | | | nonmetro county (rural) | farm-dependent | https://maps.google.com/?q=ClarkCounty+MO |
| | Cooper County | MO | 29053 | | Columbia, MO 17860 | Columbia-Jefferson
City-Moberly, MO 190 | Outlying | nonmetro county (rural) | nonspecialized | https://maps.google.com/?q=CooperCounty+MO |
| | Crawford County | MO | 29055 | | | | | nonmetro county (rural) | manufacturing-dependent | https://maps.google.com/?q=CrawfordCounty+MO |
| | Dade County | MO | 29057 | | | | | nonmetro county (rural) | farm-dependent | https://maps.google.com/?q=DadeCounty+MO |
| | Daviess County | MO | 29061 | | | | | nonmetro county (rural) | farm-dependent | https://maps.google.com/?q=DaviessCounty+MO |
| | Dent County | MO | 29065 | | | | | nonmetro county (rural) | nonspecialized | https://maps.google.com/?q=DentCounty+MO |
| | Douglas County | MO | 29067 | | | | | nonmetro county (rural) | nonspecialized | https://maps.google.com/?q=DouglasCounty+MO |
| | Dunklin County | MO | 29069 | | Kennett, MO 28380 | | Central | nonmetro county (rural) | nonspecialized | https://maps.google.com/?q=DunklinCounty+MO |