Pashtunistan (Pashto: پښتونستان, lit. 'land of the Pashtuns') or Pakhtunistan is a historical region on the crossroads of Central and South Asia, located on the Iranian Plateau, inhabited by the Pashtun people of southern and eastern Afghanistan and northwestern Pakistan, wherein Pashtun culture, the Pashto language, and identity have been based. Alternative names historically used for the region include Pashtūnkhwā or Pakhtūnkhwā (پښتونخوا), or simply the Pashtun Belt.
During British rule in India in 1893, Mortimer Durand drew the Durand Line, fixing the limits of the spheres of influence between the Emirate of Afghanistan and British India during the Great Game and leaving about half of historical Pashtun territory under British colonial rule; after the partition of British India, the Durand Line now forms the internationally recognized border between Afghanistan and Pakistan. The traditional Pashtun homeland stretches roughly from the areas south of the Amu River in Afghanistan to the areas west of the Indus River in Pakistan; it predominantly comprises the southwestern, eastern and some northern and western districts of Afghanistan, as well as most of Khyber Pakhtunkhwa and northern Balochistan in Pakistan. The region is bordered by Punjab and Hazara to the east, Balochistan to the south, Kohistan and Chitral to the north, and Hazarajat and Tajik-inhabited territory to the west.