| | | Adams County | IN | 18001 | | Decatur, IN 19540 | Fort
Wayne-Huntington-Auburn,
IN 258 | Central | not in metro; pop > 5k
< 20k; metro-adjacent | manufacturing-dependent | https://maps.google.com/?q=AdamsCounty+IN |
| | | Allen County | IN | 18003 | | Fort Wayne, IN 23060 | Fort
Wayne-Huntington-Auburn,
IN 258 | Central | in metro of > 250k
< 1m | nonspecialized | https://maps.google.com/?q=AllenCounty+IN |
| | | Bartholomew County | IN | 18005 | | Columbus, IN 18020 | Indianapolis-Carmel-Muncie,
IN 294 | Central | in metro of < 250k | manufacturing-dependent | https://maps.google.com/?q=BartholomewCounty+IN |
| | | Benton County | IN | 18007 | | Lafayette-West Lafayette,
IN 29200 | Lafayette-West
Lafayette-Frankfort, IN 320 | Outlying | in metro of < 250k | farm-dependent | https://maps.google.com/?q=BentonCounty+IN |
| | | Blackford County | IN | 18009 | | | | | not in metro; pop > 5k
< 20k; metro-adjacent | manufacturing-dependent | https://maps.google.com/?q=BlackfordCounty+IN |
| | | Boone County | IN | 18011 | | Indianapolis-Carmel-Greenwood,
IN 26900 | Indianapolis-Carmel-Muncie,
IN 294 | Central | in metro of > 1m | nonspecialized | https://maps.google.com/?q=BooneCounty+IN |
| | | Brown County | IN | 18013 | | Indianapolis-Carmel-Greenwood,
IN 26900 | Indianapolis-Carmel-Muncie,
IN 294 | Outlying | in metro of > 1m | recreation | https://maps.google.com/?q=BrownCounty+IN |
| | | Carroll County | IN | 18015 | | Lafayette-West Lafayette,
IN 29200 | Lafayette-West
Lafayette-Frankfort, IN 320 | Outlying | in metro of < 250k | manufacturing-dependent | https://maps.google.com/?q=CarrollCounty+IN |
| | | Cass County | IN | 18017 | | Logansport, IN 30900 | | Central | not in metro; pop
>20k; metro-adjacent | manufacturing-dependent | https://maps.google.com/?q=CassCounty+IN |
| | | Clark County | IN | 18019 | | Louisville/Jefferson
County, KY-IN 31140 | Louisville/Jefferson
County--Elizabethtown,
KY-IN 350 | Central | in metro of > 1m | nonspecialized | https://maps.google.com/?q=ClarkCounty+IN |
