| | Ringgold County | IA | 19159 | | | | | nonmetro county (rural) | farm-dependent | https://maps.google.com/?q=RinggoldCounty+IA |
| | Sac County | IA | 19161 | | | | | nonmetro county (rural) | farm-dependent | https://maps.google.com/?q=SacCounty+IA |
| | Tama County | IA | 19171 | | | | | nonmetro county (rural) | farm-dependent | https://maps.google.com/?q=TamaCounty+IA |
| | Taylor County | IA | 19173 | | | | | nonmetro county (rural) | farm-dependent | https://maps.google.com/?q=TaylorCounty+IA |
| | Worth County | IA | 19195 | | Mason City, IA 32380 | | Outlying | nonmetro county (rural) | farm-dependent | https://maps.google.com/?q=WorthCounty+IA |
| | Wright County | IA | 19197 | | | | | nonmetro county (rural) | farm-dependent | https://maps.google.com/?q=WrightCounty+IA |
| | Johnson County | IA | 19103 | | Iowa City, IA 26980 | Cedar Rapids-Iowa City,
IA 168 | Central | metro county (urban) | federal/state
government-dependent | https://maps.google.com/?q=JohnsonCounty+IA |
| | Mills County | IA | 19129 | | Omaha, NE-IA 36540 | Omaha-Fremont, NE-IA 420 | Outlying | metro county (urban) | federal/state
government-dependent | https://maps.google.com/?q=MillsCounty+IA |
| | Story County | IA | 19169 | | Ames, IA 11180 | Des Moines-West Des
Moines-Ames, IA 218 | Central | metro county (urban) | federal/state
government-dependent | https://maps.google.com/?q=StoryCounty+IA |
| | Adams County | IA | 19003 | | | | | nonmetro county (rural) | manufacturing-dependent | https://maps.google.com/?q=AdamsCounty+IA |