| | Noble County | OH | 39121 | | | | | nonmetro county (rural) | federal/state
government-dependent | https://maps.google.com/?q=NobleCounty+OH |
| | Ottawa County | OH | 39123 | | Sandusky, OH 41780 | Cleveland-Akron-Canton,
OH 184 | Central | nonmetro county (rural) | recreation | https://maps.google.com/?q=OttawaCounty+Ohio |
| | Paulding County | OH | 39125 | | | | | nonmetro county (rural) | manufacturing-dependent | https://maps.google.com/?q=PauldingCounty+OH |
| | Pike County | OH | 39131 | | | | | nonmetro county (rural) | manufacturing-dependent | https://maps.google.com/?q=PikeCounty+OH |
| | Preble County | OH | 39135 | | | | | nonmetro county (rural) | manufacturing-dependent | https://maps.google.com/?q=PrebleCounty+OH |
| | Putnam County | OH | 39137 | | | | | nonmetro county (rural) | manufacturing-dependent | https://maps.google.com/?q=PutnamCounty+OH |
| | Ross County | OH | 39141 | | Chillicothe, OH 17060 | Columbus-Marion-Zanesville,
OH 198 | Central | nonmetro county (rural) | federal/state
government-dependent | https://maps.google.com/?q=RossCounty+OH |
| | Sandusky County | OH | 39143 | | Fremont, OH 23380 | Cleveland-Akron-Canton,
OH 184 | Central | nonmetro county (rural) | manufacturing-dependent | https://maps.google.com/?q=SanduskyCounty+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 |