| | Delaware County | IN | 18035 | | Muncie, IN 34620 | Indianapolis-Carmel-Muncie,
IN 294 | Central | metro county (urban) | federal/state
government-dependent | https://maps.google.com/?q=DelawareCounty+IN |
| | Hamilton County | IN | 18057 | | Indianapolis-Carmel-Greenwood,
IN 26900 | Indianapolis-Carmel-Muncie,
IN 294 | Central | metro county (urban) | nonspecialized | https://maps.google.com/?q=HamiltonCounty+IN |
| | Hancock County | IN | 18059 | | Indianapolis-Carmel-Greenwood,
IN 26900 | Indianapolis-Carmel-Muncie,
IN 294 | Central | metro county (urban) | nonspecialized | https://maps.google.com/?q=HancockCounty+IN |
| | Hendricks County | IN | 18063 | | Indianapolis-Carmel-Greenwood,
IN 26900 | Indianapolis-Carmel-Muncie,
IN 294 | Central | metro county (urban) | nonspecialized | https://maps.google.com/?q=HendricksCounty+IN |
| | Henry County | IN | 18065 | | New Castle, IN 35220 | Indianapolis-Carmel-Muncie,
IN 294 | Central | nonmetro county (rural) | nonspecialized | https://maps.google.com/?q=HenryCounty+IN |
| | Howard County | IN | 18067 | | Kokomo, IN 29020 | Indianapolis-Carmel-Muncie,
IN 294 | Central | metro county (urban) | manufacturing-dependent | https://maps.google.com/?q=HowardCounty+IN |
| | Jackson County | IN | 18071 | | Seymour, IN 42980 | Indianapolis-Carmel-Muncie,
IN 294 | Central | nonmetro county (rural) | manufacturing-dependent | https://maps.google.com/?q=JacksonCounty+IN |
| | Johnson County | IN | 18081 | | Indianapolis-Carmel-Greenwood,
IN 26900 | Indianapolis-Carmel-Muncie,
IN 294 | Central | metro county (urban) | nonspecialized | https://maps.google.com/?q=JohnsonCounty+IN |
| | Madison County | IN | 18095 | | Indianapolis-Carmel-Greenwood,
IN 26900 | Indianapolis-Carmel-Muncie,
IN 294 | Outlying | metro county (urban) | nonspecialized | https://maps.google.com/?q=MadisonCounty+IN |
| | Marion County | IN | 18097 | | Indianapolis-Carmel-Greenwood,
IN 26900 | Indianapolis-Carmel-Muncie,
IN 294 | Central | metro county (urban) | nonspecialized | https://maps.google.com/?q=MarionCounty+IN |