| | | 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 |
| | | 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 |
| | | 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 |
| | | 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 |
| | | Madison County | OH | 39097 | | Columbus, OH 18140 | Columbus-Marion-Zanesville,
OH 198 | Outlying | in metro of > 1m | nonspecialized | https://maps.google.com/?q=MadisonCounty+OH |
| | | Morrow County | OH | 39117 | | Columbus, OH 18140 | Columbus-Marion-Zanesville,
OH 198 | Outlying | in metro of > 1m | nonspecialized | https://maps.google.com/?q=MorrowCounty+OH |
| | | Perry County | OH | 39127 | | Columbus, OH 18140 | Columbus-Marion-Zanesville,
OH 198 | Outlying | in metro of > 1m | nonspecialized | https://maps.google.com/?q=PerryCounty+OH |
| | | Pickaway County | OH | 39129 | | Columbus, OH 18140 | Columbus-Marion-Zanesville,
OH 198 | Outlying | in metro of > 1m | nonspecialized | https://maps.google.com/?q=PickawayCounty+OH |
| | | Union County | OH | 39159 | | Columbus, OH 18140 | Columbus-Marion-Zanesville,
OH 198 | Outlying | in metro of > 1m | manufacturing-dependent | https://maps.google.com/?q=UnionCounty+OH |
