The Comancheria or Nʉmʉnʉʉ Sookobitʉ ("Comanche Earth") in Comanche (Nʉmʉ Tekwapʉ) is the name commonly given to the region of New Mexico, west Texas and nearby areas occupied by the Comanche before the 1860s.
The area was vaguely defined and shifted over time, but generally was described as bordered to the south by the Balcones Fault, just north of San Antonio, Texas, continuing north along the Cross Timbers to encompass a northern area that included the Cimarron River and the upper Arkansas River east of the high Rockies. Comancheria was bordered along the west by the Mescalero Escarpment and the Pecos River, continuing north along the edge of the Spanish settlements in Santa Fe de Nuevo México.
Today, this region makes up West Texas, the Llano Estacado, the Texas Panhandle, the Edwards Plateau (including the Texas Hill Country), Eastern New Mexico, western Oklahoma including the Oklahoma Panhandle and the Wichita Mountains, southeastern Colorado and southwestern Kansas.
Before the Comanche expanded out of present-day Wyoming in the early eighteenth century, the lands now known as Comancheria was home to a multitude of tribes—most notably the Apaches. Much of the region had previously been known as Apachería.