| | | Meigs County | OH | 39105 | | | | | nonmetro county (rural) | nonspecialized | https://maps.google.com/?q=MeigsCounty+OH |
| | | Montgomery County | OH | 39113 | | Dayton-Kettering-Beavercreek,
OH 19430 | Dayton-Springfield-Kettering,
OH 212 | Central | metro county (urban) | nonspecialized | https://maps.google.com/?q=MontgomeryCounty+OH |
| | | Morgan County | OH | 39115 | | | | | nonmetro county (rural) | nonspecialized | https://maps.google.com/?q=MorganCounty+OH |
| | | Morrow County | OH | 39117 | | Columbus, OH 18140 | Columbus-Marion-Zanesville,
OH 198 | Outlying | metro county (urban) | nonspecialized | https://maps.google.com/?q=MorrowCounty+OH |
| | | Muskingum County | OH | 39119 | | Zanesville, OH 49780 | Columbus-Marion-Zanesville,
OH 198 | Central | nonmetro county (rural) | nonspecialized | https://maps.google.com/?q=MuskingumCounty+OH |
| | | Perry County | OH | 39127 | | Columbus, OH 18140 | Columbus-Marion-Zanesville,
OH 198 | Outlying | metro county (urban) | nonspecialized | https://maps.google.com/?q=PerryCounty+OH |
| | | Pickaway County | OH | 39129 | | Columbus, OH 18140 | Columbus-Marion-Zanesville,
OH 198 | Outlying | metro county (urban) | nonspecialized | https://maps.google.com/?q=PickawayCounty+OH |
| | | Richland County | OH | 39139 | | Mansfield, OH 31900 | Mansfield-Ashland-Bucyrus,
OH 360 | Central | metro county (urban) | nonspecialized | https://maps.google.com/?q=RichlandCounty+OH |
| | | Scioto County | OH | 39145 | | Portsmouth, OH 39020 | Charleston-Huntington-Ashland,
WV-OH-KY 170 | Central | nonmetro county (rural) | nonspecialized | https://maps.google.com/?q=SciotoCounty+OH |
| | | Seneca County | OH | 39147 | | Tiffin, OH 45660 | Findlay-Tiffin, OH 248 | Central | nonmetro county (rural) | nonspecialized | https://maps.google.com/?q=SenecaCounty+OH |
