| | | Hamilton County | OH | 39061 | | Cincinnati, OH-KY-IN 17140 | Cincinnati-Wilmington,
OH-KY-IN 178 | Central | metro county (urban) | nonspecialized | https://maps.google.com/?q=HamiltonCounty+OH |
| | | Hardin County | OH | 39065 | | | | | nonmetro county (rural) | nonspecialized | https://maps.google.com/?q=HardinCounty+OH |
| | | Highland County | OH | 39071 | | | | | nonmetro county (rural) | nonspecialized | https://maps.google.com/?q=HighlandCounty+OH |
| | | Jefferson County | OH | 39081 | | Weirton-Steubenville,
WV-OH 48260 | Pittsburgh-Weirton-Steubenville,
PA-OH-WV 430 | Central | metro county (urban) | nonspecialized | https://maps.google.com/?q=JeffersonCounty+OH |
| | | Lawrence County | OH | 39087 | | Huntington-Ashland,
WV-KY-OH 26580 | Charleston-Huntington-Ashland,
WV-OH-KY 170 | Central | metro county (urban) | nonspecialized | https://maps.google.com/?q=LawrenceCounty+OH |
| | | Licking County | OH | 39089 | | Columbus, OH 18140 | Columbus-Marion-Zanesville,
OH 198 | Outlying | metro county (urban) | nonspecialized | https://maps.google.com/?q=LickingCounty+OH |
| | | Lucas County | OH | 39095 | | Toledo, OH 45780 | | Central | metro county (urban) | nonspecialized | https://maps.google.com/?q=LucasCounty+Ohio |
| | | Madison County | OH | 39097 | | Columbus, OH 18140 | Columbus-Marion-Zanesville,
OH 198 | Outlying | metro county (urban) | nonspecialized | https://maps.google.com/?q=MadisonCounty+OH |
| | | Mahoning County | OH | 39099 | | Youngstown-Warren, OH 49660 | Youngstown-Warren-Salem,
OH 566 | Central | metro county (urban) | nonspecialized | https://maps.google.com/?q=MahoningCounty+OH |
| | | Medina County | OH | 39103 | | Cleveland, OH 17410 | Cleveland-Akron-Canton,
OH 184 | Central | metro county (urban) | nonspecialized | https://maps.google.com/?q=MedinaCounty+OH |
