| Apple River |
| Cache River - Cypress Creek |
| Coon Creek - Kishwaukee River - Crow's Foot Marsh |
| Eastern Shawnee |
| Green River |
| Hill Prairie Corridor - North Section |
| Hill Prairie Corridor - South Section |
| Illinois Beach - Chiwaukee Prairie |
| Kanakakee Sands - Kankakee River - Momence Wetlands - Pembroke Savanna |
| LaRue - Pine Hills - Western Shawnee - Trail of Tears |
| Lake McHenry Wetland Complex |
| Lost Mound - Hanover Bluff - Mississippi Palisades |
| Lower Fox River |
| Lower Kaskaskia Bottomlands |
| Lower LaMoine River |
| Mason County Sand Areas |
| Middle Illinois River - Meredosia to DePue |
| Middle Little Wabash |
| Middle Mississippi River |
| Midewin - Des Plaines - Goose Lake Prairie |
| Nachusa - Franklin Creek - Castle Rock - Lowden Miller |
| Pere Marquette |
| Prairie Ridge Landscape |
| Pyramid - Arkland Landscape |
| Rock River |
| Siloam Springs |
| Sinkhole Plain |
| Sugar - Pecatonica River |
| Upper Des Plaines River Corridor |
| Upper Mississippi River |
| Vermilion River (Middle Fork, North Fork & Salt Fork) & Little Vermilion R* |
| Wabash River, Floodplain & Backwater Ponds |
| Wisconsin Driftless Forest |