| | Daviess County | IN | 18027 | | Washington, IN 47780 | | Central | nonmetro county (rural) | nonspecialized | https://maps.google.com/?q=DaviessCounty+IN |
| | Decatur County | IN | 18031 | | Greensburg, IN 24700 | Indianapolis-Carmel-Muncie,
IN 294 | Central | nonmetro county (rural) | manufacturing-dependent | https://maps.google.com/?q=DecaturCounty+IN |
| | DeKalb County | IN | 18033 | | Auburn, IN 12140 | Fort
Wayne-Huntington-Auburn,
IN 258 | Central | nonmetro county (rural) | manufacturing-dependent | https://maps.google.com/?q=DeKalbCounty+IN |
| | 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 |
| | Dubois County | IN | 18037 | | Jasper, IN 27540 | | Central | nonmetro county (rural) | manufacturing-dependent | https://maps.google.com/?q=DuboisCounty+IN |
| | Elkhart County | IN | 18039 | | Elkhart-Goshen, IN 21140 | South
Bend-Elkhart-Mishawaka,
IN-MI 515 | Central | metro county (urban) | manufacturing-dependent | https://maps.google.com/?q=ElkhartCounty+IN |
| | Fayette County | IN | 18041 | | Connersville, IN 18220 | Richmond-Connersville, IN 458 | Central | nonmetro county (rural) | nonspecialized | https://maps.google.com/?q=FayetteCounty+IN |
| | Floyd County | IN | 18043 | | Louisville/Jefferson
County, KY-IN 31140 | Louisville/Jefferson
County--Elizabethtown,
KY-IN 350 | Central | metro county (urban) | nonspecialized | https://maps.google.com/?q=FloydCounty+IN |
| | Grant County | IN | 18053 | | Marion, IN 31980 | | Central | nonmetro county (rural) | manufacturing-dependent | https://maps.google.com/?q=GrantCounty+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 |