| | Cherokee County | IA | 19035 | | | | | nonmetro county (rural) | manufacturing-dependent | https://maps.google.com/?q=CherokeeCounty+IA |
| | Chickasaw County | IA | 19037 | | | | | nonmetro county (rural) | manufacturing-dependent | https://maps.google.com/?q=ChickasawCounty+IA |
| | Clarke County | IA | 19039 | | | | | nonmetro county (rural) | manufacturing-dependent | https://maps.google.com/?q=ClarkeCounty+IA |
| | Clayton County | IA | 19043 | | | | | nonmetro county (rural) | nonspecialized | https://maps.google.com/?q=ClaytonCounty+IA |
| | Crawford County | IA | 19047 | | | | | nonmetro county (rural) | manufacturing-dependent | https://maps.google.com/?q=CrawfordCounty+IA |
| | Davis County | IA | 19051 | | | | | nonmetro county (rural) | farm-dependent | https://maps.google.com/?q=DavisCounty+IA |
| | Decatur County | IA | 19053 | | | | | nonmetro county (rural) | nonspecialized | https://maps.google.com/?q=DecaturCounty+IA |
| | Delaware County | IA | 19055 | | | | | nonmetro county (rural) | manufacturing-dependent | https://maps.google.com/?q=DelawareCounty+IA |
| | Emmet County | IA | 19063 | | | | | nonmetro county (rural) | nonspecialized | https://maps.google.com/?q=EmmetCounty+IA |
| | Fayette County | IA | 19065 | | | | | nonmetro county (rural) | nonspecialized | https://maps.google.com/?q=FayetteCounty+IA |