| | 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 |
| | Jackson County | OH | 39079 | | | | | nonmetro county (rural) | manufacturing-dependent | https://maps.google.com/?q=JacksonCounty+Ohio |
| | Knox County | OH | 39083 | | Mount Vernon, OH 34540 | Columbus-Marion-Zanesville,
OH 198 | Central | nonmetro county (rural) | manufacturing-dependent | https://maps.google.com/?q=KnoxCounty+OH |
| | Logan County | OH | 39091 | | Bellefontaine, OH 13340 | Columbus-Marion-Zanesville,
OH 198 | Central | nonmetro county (rural) | manufacturing-dependent | https://maps.google.com/?q=LoganCounty+OH |
| | Marion County | OH | 39101 | | Marion, OH 32020 | Columbus-Marion-Zanesville,
OH 198 | Central | nonmetro county (rural) | manufacturing-dependent | https://maps.google.com/?q=MarionCounty+OH |
| | Meigs County | OH | 39105 | | | | | nonmetro county (rural) | nonspecialized | https://maps.google.com/?q=MeigsCounty+OH |
| | Mercer County | OH | 39107 | | Celina, OH 16380 | Lima-Van Wert-Celina, OH 338 | Central | nonmetro county (rural) | manufacturing-dependent | https://maps.google.com/?q=MercerCounty+OH |
| | Monroe County | OH | 39111 | | | | | nonmetro county (rural) | manufacturing-dependent | https://maps.google.com/?q=MonroeCounty+OH |
| | Morgan County | OH | 39115 | | | | | nonmetro county (rural) | nonspecialized | https://maps.google.com/?q=MorganCounty+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 |