| | Audubon County | IA | 19009 | | | | | nonmetro county (rural) | farm-dependent | https://maps.google.com/?q=AudubonCounty+IA |
| | Butler County | IA | 19023 | | | | | nonmetro county (rural) | farm-dependent | https://maps.google.com/?q=ButlerCounty+IA |
| | Calhoun County | IA | 19025 | | | | | nonmetro county (rural) | farm-dependent | https://maps.google.com/?q=CalhounCounty+IA |
| | Davis County | IA | 19051 | | | | | nonmetro county (rural) | farm-dependent | https://maps.google.com/?q=DavisCounty+IA |
| | Franklin County | IA | 19069 | | | | | nonmetro county (rural) | farm-dependent | https://maps.google.com/?q=FranklinCounty+IA |
| | Greene County | IA | 19073 | | | | | nonmetro county (rural) | farm-dependent | https://maps.google.com/?q=GreeneCounty+IA |
| | Grundy County | IA | 19075 | | Waterloo-Cedar Falls, IA 47940 | | Outlying | metro county (urban) | farm-dependent | https://maps.google.com/?q=GrundyCounty+IA |
| | Guthrie County | IA | 19077 | | Des Moines-West Des
Moines, IA 19780 | Des Moines-West Des
Moines-Ames, IA 218 | Outlying | metro county (urban) | farm-dependent | https://maps.google.com/?q=GuthrieCounty+IA |
| | Hamilton County | IA | 19079 | | | | | nonmetro county (rural) | farm-dependent | https://maps.google.com/?q=HamiltonCounty+IA |
| | Hardin County | IA | 19083 | | | | | nonmetro county (rural) | farm-dependent | https://maps.google.com/?q=HardinCounty+IA |