| | | LaPorte County | IN | 18091 | | Michigan City-La Porte,
IN 33140 | Chicago-Naperville,
IL-IN-WI 176 | Central | metro county (urban) | nonspecialized | https://maps.google.com/?q=LaPorteCounty+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 |
| | | Monroe County | IN | 18105 | | Bloomington, IN 14020 | Bloomington-Bedford, IN 144 | Central | metro county (urban) | federal/state
government-dependent | https://maps.google.com/?q=MonroeCounty+IN |
| | | Morgan County | IN | 18109 | | Indianapolis-Carmel-Greenwood,
IN 26900 | Indianapolis-Carmel-Muncie,
IN 294 | Central | metro county (urban) | nonspecialized | https://maps.google.com/?q=MorganCounty+IN |
| | | Newton County | IN | 18111 | Lake County-Porter
County-Jasper County, IN 29414 | Chicago-Naperville-Elgin,
IL-IN 16980 | Chicago-Naperville,
IL-IN-WI 176 | Outlying | metro county (urban) | nonspecialized | https://maps.google.com/?q=NewtonCounty+Indiana |
| | | Ohio County | IN | 18115 | | Cincinnati, OH-KY-IN 17140 | Cincinnati-Wilmington,
OH-KY-IN 178 | Outlying | metro county (urban) | recreation | https://maps.google.com/?q=OhioCounty+IN |
| | | Owen County | IN | 18119 | | Bloomington, IN 14020 | Bloomington-Bedford, IN 144 | Outlying | metro county (urban) | manufacturing-dependent | https://maps.google.com/?q=OwenCounty+IN |
| | | Porter County | IN | 18127 | Lake County-Porter
County-Jasper County, IN 29414 | Chicago-Naperville-Elgin,
IL-IN 16980 | Chicago-Naperville,
IL-IN-WI 176 | Central | metro county (urban) | manufacturing-dependent | https://maps.google.com/?q=PorterCounty+Indiana |
| | | Posey County | IN | 18129 | | Evansville, IN 21780 | Evansville-Henderson,
IN-KY 241 | Outlying | metro county (urban) | manufacturing-dependent | https://maps.google.com/?q=PoseyCounty+IN |
