Preserve List
| Preserve Name | Acres |
| Beck’s Woods | 283 |
| Boger Bog | 38 |
| Boone Creek | 608 |
| Brookdale | 1,645 |
| Coral Woods | 775 |
| County Line Road Access | 10 |
| Dufield Pond | 78 |
| Elizabeth Lake Nature Preserve | 345 |
| Exner Marsh | 220 |
| Fel Pro RRR | 277 |
| Fox Bluff | 279 |
| Glacial Park | 3,432 |
| Harrison Benwell | 75 |
| Hickory Grove & Lyons Prairie and Marsh | 411 |
| High Point | 253 |
| The Hollows | 478 |
| Kishwaukee Headwaters | 153 |
| Lake in the Hills Fen | 400 |
| Marengo Ridge | 818 |
| Nippersink Canoe Base | 377 |
| North Branch | 521 |
| Pleasant Valley | 2,080 |
| Rush Creek | 726 |
| Silver Creek | 840 |
| Stickney Run | 629 |
| Winding Creek | 631 |
| TOTAL | 16,382 |
