| | | Athens County | OH | 39009 | | Athens, OH 11900 | Columbus-Marion-Zanesville,
OH 198 | Central | not in metro; pop
>20k; metro-adjacent | federal/state
government-dependent | https://maps.google.com/?q=AthensCounty+OH |
| | | Delaware County | OH | 39041 | | Columbus, OH 18140 | Columbus-Marion-Zanesville,
OH 198 | Central | in metro of > 1m | nonspecialized | https://maps.google.com/?q=DelawareCounty+OH |
| | | Fairfield County | OH | 39045 | | Columbus, OH 18140 | Columbus-Marion-Zanesville,
OH 198 | Central | in metro of > 1m | nonspecialized | https://maps.google.com/?q=FairfieldCounty+OH |
| | | Fayette County | OH | 39047 | | Washington Court House,
OH 47920 | Columbus-Marion-Zanesville,
OH 198 | Central | not in metro; pop > 5k
< 20k; metro-adjacent | nonspecialized | https://maps.google.com/?q=FayetteCounty+OH |
| | | Franklin County | OH | 39049 | | Columbus, OH 18140 | Columbus-Marion-Zanesville,
OH 198 | Central | in metro of > 1m | federal/state
government-dependent | https://maps.google.com/?q=FranklinCounty+OH |
| | | Guernsey County | OH | 39059 | | Cambridge, OH 15740 | Columbus-Marion-Zanesville,
OH 198 | Central | not in metro; pop > 5k
< 20k; metro-adjacent | nonspecialized | https://maps.google.com/?q=GuernseyCounty+OH |
| | | Hocking County | OH | 39073 | | Columbus, OH 18140 | Columbus-Marion-Zanesville,
OH 198 | Outlying | in metro of > 1m | recreation | https://maps.google.com/?q=HockingCounty+OH |
| | | Knox County | OH | 39083 | | Mount Vernon, OH 34540 | Columbus-Marion-Zanesville,
OH 198 | Central | not in metro; pop > 5k
< 20k; metro-adjacent | manufacturing-dependent | https://maps.google.com/?q=KnoxCounty+OH |
| | | Licking County | OH | 39089 | | Columbus, OH 18140 | Columbus-Marion-Zanesville,
OH 198 | Outlying | in metro of > 1m | nonspecialized | https://maps.google.com/?q=LickingCounty+OH |
| | | Logan County | OH | 39091 | | Bellefontaine, OH 13340 | Columbus-Marion-Zanesville,
OH 198 | Central | not in metro; pop
>20k; metro-adjacent | manufacturing-dependent | https://maps.google.com/?q=LoganCounty+OH |
