| | | Boone County | IA | 19015 | | Ames, IA 11180 | Des Moines-West Des
Moines-Ames, IA 218 | Outlying | in metro of < 250k | nonspecialized | https://maps.google.com/?q=BooneCounty+Iowa |
| | | Dallas County | IA | 19049 | | Des Moines-West Des
Moines, IA 19780 | Des Moines-West Des
Moines-Ames, IA 218 | Central | in metro of > 250k
< 1m | nonspecialized | https://maps.google.com/?q=DallasCounty+IA |
| | | Guthrie County | IA | 19077 | | Des Moines-West Des
Moines, IA 19780 | Des Moines-West Des
Moines-Ames, IA 218 | Outlying | in metro of > 250k
< 1m | farm-dependent | https://maps.google.com/?q=GuthrieCounty+IA |
| | | Jasper County | IA | 19099 | | Des Moines-West Des
Moines, IA 19780 | Des Moines-West Des
Moines-Ames, IA 218 | Outlying | in metro of > 250k
< 1m | nonspecialized | https://maps.google.com/?q=JasperCounty+Iowa |
| | | Madison County | IA | 19121 | | Des Moines-West Des
Moines, IA 19780 | Des Moines-West Des
Moines-Ames, IA 218 | Outlying | in metro of > 250k
< 1m | nonspecialized | https://maps.google.com/?q=MadisonCounty+IA |
| | | Mahaska County | IA | 19123 | | Oskaloosa, IA 36820 | Des Moines-West Des
Moines-Ames, IA 218 | Central | not in metro; pop > 5K
< 20k;
non-metro-adjacent | nonspecialized | https://maps.google.com/?q=MahaskaCounty+IA |
| | | Marion County | IA | 19125 | | Pella, IA 37800 | Des Moines-West Des
Moines-Ames, IA 218 | Central | not in metro; pop > 5k
< 20k; metro-adjacent | manufacturing-dependent | https://maps.google.com/?q=MarionCounty+IA |
| | | Polk County | IA | 19153 | | Des Moines-West Des
Moines, IA 19780 | Des Moines-West Des
Moines-Ames, IA 218 | Central | in metro of > 250k
< 1m | nonspecialized | https://maps.google.com/?q=PolkCounty+IA |
| | | Story County | IA | 19169 | | Ames, IA 11180 | Des Moines-West Des
Moines-Ames, IA 218 | Central | in metro of < 250k | federal/state
government-dependent | https://maps.google.com/?q=StoryCounty+IA |
| | | Warren County | IA | 19181 | | Des Moines-West Des
Moines, IA 19780 | Des Moines-West Des
Moines-Ames, IA 218 | Outlying | in metro of > 250k
< 1m | nonspecialized | https://maps.google.com/?q=WarrenCounty+IA |
