| Cache River State Natural Area | |
|---|---|
 Taxodium distichum in Heron Pond | |
  Map of the U.S. state of Illinois showing the location of Cache River State Natural Area  Cache River State Natural Area (the United States) | |
| Location | Johnson County, Illinois, USA |
| Nearest city | Belknap, Illinois |
| Coordinates | 37°21′44″N 88°57′20″W / 37.36222°N 88.95556°W |
| Area | 14,314 acres (5,793 ha) |
| Established | 1970 |
| Governing body | Illinois Department of Natural Resources |
Cache River State Natural Area is an Illinois state park centered on the Cache River (Illinois) of 14,314 acres (5,793 ha) in Johnson County, Illinois, United States.