| Sielbeck Forest Natural Area | |
|---|---|
  Map of the U.S. state of Illinois showing the location of Sielbeck Forest Natural Area  Sielbeck Forest Natural Area (the United States) | |
| Location | Massac County, Illinois, United States |
| Nearest city | Metropolis, Illinois |
| Coordinates | 37°13′48″N 88°45′33″W / 37.23°N 88.7592°W[1] |
| Area | 385 acres (156 ha) |
| Established | 1998 |
| Governing body | Illinois Department of Natural Resources |
Sielbeck Forest Natural Area is an Illinois state park on 385 acres (156 ha) in Johnson County, Illinois, United States.
- ^ Sielbeck Forest State Natural Area protectedplanet.net