| | | Adair County | IA | 19001 | | | | | not in metro; pop <
5k; metro-adjacent | nonspecialized | https://maps.google.com/?q=AdairCounty+IA |
| | | Adams County | IA | 19003 | | | | | not in metro; pop <
5k; non-metro-adjacent | manufacturing-dependent | https://maps.google.com/?q=AdamsCounty+IA |
| | | Allamakee County | IA | 19005 | | | | | not in metro; pop <
5k; metro-adjacent | nonspecialized | https://maps.google.com/?q=AllamakeeCounty+IA |
| | | Appanoose County | IA | 19007 | | | | | not in metro; pop > 5K
< 20k;
non-metro-adjacent | nonspecialized | https://maps.google.com/?q=AppanooseCounty+IA |
| | | Audubon County | IA | 19009 | | | | | not in metro; pop <
5k; non-metro-adjacent | farm-dependent | https://maps.google.com/?q=AudubonCounty+IA |
| | | Benton County | IA | 19011 | | Cedar Rapids, IA 16300 | Cedar Rapids-Iowa City,
IA 168 | Outlying | in metro of > 250k
< 1m | nonspecialized | https://maps.google.com/?q=BentonCounty+IA |
| | | Black Hawk County | IA | 19013 | | Waterloo-Cedar Falls, IA 47940 | | Central | in metro of < 250k | manufacturing-dependent | https://maps.google.com/?q=BlackHawkCounty+IA |
| | | 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 |
| | | Bremer County | IA | 19017 | | Waterloo-Cedar Falls, IA 47940 | | Outlying | in metro of < 250k | nonspecialized | https://maps.google.com/?q=BremerCounty+IA |
| | | Buchanan County | IA | 19019 | | | | | not in metro; pop > 5k
< 20k; metro-adjacent | nonspecialized | https://maps.google.com/?q=BuchananCounty+IA |
