Ayun (Khowar: Oyon, Urdu: ایون) is a valley in Lower Chitral, Khyber Pakhtunkhwa, Pakistan, 23 km south of the town of Chitral. It is located on the Chitral River at its confluence with the Bumburet River. Mountains surround the valley. The Bumburet River runs the length of the village and its water is used for irrigation, drinking, and the generation of electricity for the Ayun valley.

Ayun has an average elevation of 4,500 ft (1,400 m).

The valley shares its borders with Bumburet and Birir to the west, Broze to the east, Chitral to the north, and Gahirat to the south.

The average annual temperature in Ayun is 26°C. Each year, there is an approximate 1209 mm | 47.6 inch of precipitation that occurs.

Chitrali is the main language spoken in Ayun. Bashgali is also spoken by a small population.

Mehtarjao Sirbuland Khan, the ancestor of the Khaniye tribe of Ayun and Drosh.

Mohayat Lal, the great grandson of Mehtarjao Sirbuland Khan. He remained Hakim of Ayun before partition.