Rita Blanca National Grassland is a National Grassland on the Great Plains. It is located in northern Dallam County, Texas, in the Texas Panhandle, and in southern Cimarron County, Oklahoma, in the western Oklahoma Panhandle.
It is not a solid block of protected land, but rather several small blocks of U.S. Forest Service owned native prairie grasslands. It has a land area of 92,989 acres (37,631 ha).
The grassland is administered by the Cibola National Forest, along with the Great Plains Black Kettle National Grassland, Kiowa National Grassland, and McClellan Creek National Grassland, and forest ranger districts in New Mexico. The Cibola National Forest headquarters are located in Albuquerque, New Mexico. There are local ranger district offices located in Clayton, New Mexico.
The principal city in the area is Dalhart, Texas, which houses the XIT Museum.