| Blue River |
| Cache River/Shawnee Hills |
| Eastern Lake Erie Watershed |
| Glacial Lakes |
| Glacial Wetlands and Lowlands |
| Glaciated Prairie Plains |
| Grand Kankakee/Northwest Moraines |
| Great Lakes Coastal Area |
| Iowa Driftless Area |
| Lake Erie Marshes |
| Loess Hills Missouri River |
| Lower Illinois River |
| Milwaukee Urban Conservation Area |
| Minnesota Driftless Area |
| Mississippi Cypress Swamps and Bends |
| Mississippi Plains and Forested Blufflands |
| Mississippi River |
| Muscatatuck Flats and Lowlands |
| Northeast Illinois Outwash Plain |
| Northwest Illinois Driftless Area |
| Oak Openings Area |
| Oak Pine Forest |
| Osage and Ozark Prairie Plains |
| Ozark Mountain Karst |
| Prairie Pothole |
| Prairie Potholes |
| Southeast Iowa River Corridor |
| Southern Iowa Drift Plain |
| Southwestern River Corridors |
| Upper Mississippi Headwaters |
| Upper Mississippi River Great Lakes Joint Venture 1 |
| Upper Mississippi River Great Lakes Joint Venture 2 |
| Upper Ohio River Watershed |
| Upper Tippecanoe River |
| Walhonding River Watershed |
| West Central Ohio Rivers |
| Wisconsin Driftless Area |
| Young Forest Initiative |