Pashtun nationalism is an ideology that claims that the Pashtuns form a distinct nation and that they should always be united to preserve their culture and homeland. In Afghanistan, those who advocate Pashtun nationalism favour the idea of a "Greater Afghanistan", which includes Khyber Pakhtunkhwa, and be ruled directly under Pashtun principles.

Pashto is an Eastern Iranian language in the Indo-European language family, natively spoken in northwestern Pakistan, southern and eastern Afghanistan, and some isolated pockets of far eastern Iran near the Afghan border. It has official status in Afghanistan and the Pakistani province of Khyber Pakhtunkhwa. It is known in historical Persian literature as Afghani.