Tirahi (Pashto: تيراهي) are an Indo-Aryan people who are native and original inhabitants of Tirah valley. They are closely related to their Dardic neighbours and speak Tirahi language, a nearly extinct if not already extinct Indo-Aryan language which may still be spoken by older adults, who are likewise fluent in Pashto, in a few villages in the southeast of Jalalabad in Nangarhar Province, Afghanistan. They were the previous inhabitants of Tirah and the Peshawar Valley in modern-day Khyber Pakhtunkhwa, Pakistan.
The Tirahis were expelled from Tirah by the Afridi Pashtuns. Georg Morgenstierne claimed that Tirahi language is "probably the remnant of a dialect group extending from Tirah through the Peshawar district into Swat and Dir."
It is very likely that this language is extinct. The Tirahi are "a group of unclear origin, almost completely assimilated by Pashtun" (Pstrusinska and Gray 1990).