| Clayey High Lime Till Plains |
| Darby Plains |
| Erie Gorges |
| Erie/Ontario Lake Plain |
| Knobs-Lower Scioto Dissected Plateau |
| Loamy High Lime Till Plains |
| Low Lime Drift Plain |
| Mad River Interlobate Area |
| Marblehead Drift/Limestone Plain |
| Maumee Lake Plain |
| Monongahela Transition Zone |
| Mosquito Creek/Pymatuning Lowlands |
| Oak Openings |
| Ohio/Kentucky Carboniferous Plateau |
| Outer Bluegrass |
| Paulding Plains |
| Permian Hills |
| Pittsburgh Low Plateau |
| Pre-Wisconsinan Drift Plains |
| Summit Interlobate Area |
| Unglaciated Upper Muskingum Basin |
| Whitewater Interlobate Area |