| | 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 |
| | Montgomery County | IN | 18107 | | Crawfordsville, IN 18820 | Indianapolis-Carmel-Muncie,
IN 294 | Central | nonmetro county (rural) | manufacturing-dependent | https://maps.google.com/?q=MontgomeryCounty+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 |
| | Noble County | IN | 18113 | | Kendallville, IN 28340 | Fort
Wayne-Huntington-Auburn,
IN 258 | Central | nonmetro county (rural) | manufacturing-dependent | https://maps.google.com/?q=NobleCounty+IN |
| | 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 |
| | Orange County | IN | 18117 | | | | | nonmetro county (rural) | recreation | https://maps.google.com/?q=OrangeCounty+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 |
| | Parke County | IN | 18121 | | | | | nonmetro county (rural) | federal/state
government-dependent | https://maps.google.com/?q=ParkeCounty+IN |
| | Perry County | IN | 18123 | | | | | nonmetro county (rural) | manufacturing-dependent | https://maps.google.com/?q=PerryCounty+IN |
| | Pike County | IN | 18125 | | | | | nonmetro county (rural) | mining-dependent | https://maps.google.com/?q=PikeCounty+IN |