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| Lighthouse |
| Metro and City Park |
| National Forest |
| National Historic Landmark |
| National Historic Site |
| National Historical Park |
| National Memorial |
| National Park |
| National Recreation Area |
| National Seashore |
| National Wildlife Area |
| National Wildlife Refuge |
| State Fish Hatchery |
| State Fishery Area |
| State Forest |
| State Historic Site |
| State Memorial |
| State Natural Area |
| State Nature Preserve |
| State Nursery |
| State Park |
| State Preserve |
| State Recreation Area |
| State Reserve |
| State Wildlife Area |
| State Wildlife Management Area |
| State Wildlife Refuge |
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| Mohican State Forest | State Forest | 5.2 | Hanover | Ohio |
| Mohican State Park | State Park | 6.1 | Loudonville | Ohio |
| Mount Gilead State Park | State Park | 22.5 | Mount Gilead | Ohio |
| Killbuck Marsh Wildlife Area | State Wildlife Area | 23 | Shreve | Ohio |
| Findley State Park | State Park | 34.4 | Wellington | Ohio |
| Spencer Lake Wildlife Area | State Wildlife Area | 36.3 | Spencer | Ohio |
| Delaware State Park | State Park | 38.9 | Delaware | Ohio |
| Monroe Basin Wildlife Area | State Wildlife Area | 40.5 | Dresden | Ohio |
| Octagon State Memorial | State Memorial | 41.1 | Newark | Ohio |
| Great Circle Earthworks | State Park | 41.6 | Heath | Ohio |