West Kameng is a district of Arunachal Pradesh in India. It accounts for 8.86% of the total area of the state. Under Chinese sovereignty claim, West Kameng falls under the jurisdiction of Cuona County of Shannan Prefecture of the Tibet Autonomous Region. The name is derived from the Kameng river, a tributary of the Brahmaputra, that flows through the district.
West Kameng comprises five major tribes: Monpa (which makes up 78% of the district's population and includes Dirang, Bhut, Lish, and Kalaktang Monpa), Miji (Sajolang), Sherdukpen, Aka (Hrusso), and Khowa (Bugun). Minority tribes include Takpa, Lishipa, Chugpa, and Butpa.
Most of the inhabitants are Buddhist, though the Aka, Khowa, and Miji have indigenous religions and those tribe members follow a mix of Buddhism, Hinduism, and Donyi-Polo (a form of Animism).
Like East Kameng, the West Kameng district experiences an arid tundra or a cool temperate climate in the north. Snow fall occurs from mid-November to February.
Like most of Arunachal Pradesh, Jhum, or shifting cultivation, is practised among the tribes who live in lower elevations where there is a temperate or subtropical climate. Horiculture is practised as well.
Small industries such as textile and handicraft factories can be found.