| | 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 |
| | Warren County | OH | 39165 | | Cincinnati, OH-KY-IN 17140 | Cincinnati-Wilmington,
OH-KY-IN 178 | Central | metro county (urban) | nonspecialized | https://maps.google.com/?q=WarrenCounty+OH |
| | Ashtabula County | OH | 39007 | | Cleveland, OH 17410 | Cleveland-Akron-Canton,
OH 184 | Outlying | nonmetro county (rural) | manufacturing-dependent | https://maps.google.com/?q=AshtabulaCounty+Ohio |
| | Carroll County | OH | 39019 | | Canton-Massillon, OH 15940 | Cleveland-Akron-Canton,
OH 184 | Outlying | metro county (urban) | nonspecialized | https://maps.google.com/?q=CarrollCounty+OH |
| | Coshocton County | OH | 39031 | | Coshocton, OH 18740 | Cleveland-Akron-Canton,
OH 184 | Central | nonmetro county (rural) | manufacturing-dependent | https://maps.google.com/?q=CoshoctonCounty+OH |
| | Cuyahoga County | OH | 39035 | | Cleveland, OH 17410 | Cleveland-Akron-Canton,
OH 184 | Central | metro county (urban) | nonspecialized | https://maps.google.com/?q=CuyahogaCounty+OH |
| | Erie County | OH | 39043 | | Sandusky, OH 41780 | Cleveland-Akron-Canton,
OH 184 | Central | nonmetro county (rural) | recreation | https://maps.google.com/?q=ErieCounty+OH |
| | Geauga County | OH | 39055 | | Cleveland, OH 17410 | Cleveland-Akron-Canton,
OH 184 | Central | metro county (urban) | manufacturing-dependent | https://maps.google.com/?q=GeaugaCounty+OH |
| | Huron County | OH | 39077 | | Norwalk, OH 35940 | Cleveland-Akron-Canton,
OH 184 | Central | nonmetro county (rural) | manufacturing-dependent | https://maps.google.com/?q=HuronCounty+OH |
| | Lake County | OH | 39085 | | Cleveland, OH 17410 | Cleveland-Akron-Canton,
OH 184 | Central | metro county (urban) | manufacturing-dependent | https://maps.google.com/?q=LakeCounty+OH |