| | Iowa County | IA | 19095 | | | | | nonmetro county (rural) | manufacturing-dependent | https://maps.google.com/?q=IowaCounty+IA |
| | Jackson County | IA | 19097 | | | | | nonmetro county (rural) | nonspecialized | https://maps.google.com/?q=JacksonCounty+IA |
| | Jasper County | IA | 19099 | | Des Moines-West Des
Moines, IA 19780 | Des Moines-West Des
Moines-Ames, IA 218 | Outlying | nonmetro county (rural) | nonspecialized | https://maps.google.com/?q=JasperCounty+Iowa |
| | Jefferson County | IA | 19101 | | | | | nonmetro county (rural) | nonspecialized | https://maps.google.com/?q=JeffersonCounty+Iowa |
| | Keokuk County | IA | 19107 | | | | | nonmetro county (rural) | farm-dependent | https://maps.google.com/?q=KeokukCounty+IA |
| | Kossuth County | IA | 19109 | | | | | nonmetro county (rural) | farm-dependent | https://maps.google.com/?q=KossuthCounty+IA |
| | Lee County | IA | 19111 | | Fort Madison, IA 22800 | Burlington-Fort Madison,
IA-IL 161 | Central | nonmetro county (rural) | manufacturing-dependent | https://maps.google.com/?q=LeeCounty+IA |
| | Louisa County | IA | 19115 | | | | | nonmetro county (rural) | manufacturing-dependent | https://maps.google.com/?q=LouisaCounty+IA |
| | Lucas County | IA | 19117 | | | | | nonmetro county (rural) | nonspecialized | https://maps.google.com/?q=LucasCounty+IA |
| | Lyon County | IA | 19119 | | | | | nonmetro county (rural) | farm-dependent | https://maps.google.com/?q=LyonCounty+IA |