National Grasslands
20 U.S. National Grasslands & 1 Tallgrass Prairie, operated by the USDA Forest Service to preserve several million acres of grassy vistas and provide ecosystem services for the public.
- Black Kettle National Grassland
- Buffalo Gap National Grassland
- Butte Valley National Grassland
- Caddo National Grassland
- Cedar River National Grassland
- Cimarron National Grassland
- Comanche National Grassland
- Crooked River National Grassland
- Curlew National Grassland
- Fort Pierre National Grassland
- Grand River National Grassland
- Kiowa National Grassland
- Little Missouri National Grassland
- Lyndon B. Johnson National Grassland
- McClellan Creek National Grassland
- Midewin National Tallgrass Prairie
- Oglala National Grassland
- Pawnee National Grassland
- Rita Blanca National Grassland
- Sheyenne National Grassland
- Thunder Basin National Grassland