| Midewin National Tallgrass Prairie | |
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| Location | Will County, Illinois, United States |
| Nearest city | Wilmington |
| Coordinates | 41°22′44″N 88°06′41″W / 41.378845°N 88.111335°W[1] |
| Area | 18,226 acres (73.76 km2)[2] |
| Established | 1996 |
| Governing body | U.S. Forest Service |
| Website | www |
The Midewin National Tallgrass Prairie (MNTP) is a tallgrass prairie reserve and is preserved as United States National Grassland operated by the United States Forest Service. The first national tallgrass prairie ever designated in the United States and the largest conservation site in the Chicago Wilderness region, it is located on the site of the former Joliet Army Ammunition Plant between the towns of Elwood, Manhattan and Wilmington in northeastern Illinois. Since 2015, it has hosted a conservation herd of American bison to study their interaction with prairie restoration and conservation.
- ^ "Midewin National Tallgrass Prairie". Geographic Names Information System. United States Geological Survey, United States Department of the Interior. Retrieved December 22, 2012.
- ^ "Land Areas of the National Forest System" (PDF). U.S. Forest Service. January 2013. Archived from the original on July 1, 2013. Retrieved December 22, 2012.