| | | Wapello County | IA | 19179 | | Ottumwa, IA 36900 | | Central | nonmetro county (rural) | manufacturing-dependent | https://maps.google.com/?q=WapelloCounty+IA |
| | | Marion County | IA | 19125 | | Pella, IA 37800 | Des Moines-West Des
Moines-Ames, IA 218 | Central | nonmetro county (rural) | manufacturing-dependent | https://maps.google.com/?q=MarionCounty+IA |
| | | Woodbury County | IA | 19193 | | Sioux City, IA-NE-SD 43580 | Sioux City-Le Mars,
IA-NE-SD 512 | Central | metro county (urban) | nonspecialized | https://maps.google.com/?q=WoodburyCounty+IA |
| | | Clay County | IA | 19041 | | Spencer, IA 43980 | Spencer-Spirit Lake, IA 517 | Central | nonmetro county (rural) | nonspecialized | https://maps.google.com/?q=ClayCounty+IA |
| | | Dickinson County | IA | 19059 | | Spirit Lake, IA 44020 | Spencer-Spirit Lake, IA 517 | Central | nonmetro county (rural) | recreation | https://maps.google.com/?q=DickinsonCounty+IA |
| | | Buena Vista County | IA | 19021 | | Storm Lake, IA 44740 | | Central | nonmetro county (rural) | manufacturing-dependent | https://maps.google.com/?q=BuenaVistaCounty+IA |
| | | Black Hawk County | IA | 19013 | | Waterloo-Cedar Falls, IA 47940 | | Central | metro county (urban) | manufacturing-dependent | https://maps.google.com/?q=BlackHawkCounty+IA |
| | | Bremer County | IA | 19017 | | Waterloo-Cedar Falls, IA 47940 | | Outlying | metro county (urban) | nonspecialized | https://maps.google.com/?q=BremerCounty+IA |
| | | Grundy County | IA | 19075 | | Waterloo-Cedar Falls, IA 47940 | | Outlying | metro county (urban) | farm-dependent | https://maps.google.com/?q=GrundyCounty+IA |
