Kỳ Sơn is a rural district in western Nghệ An Province in the North Central Coast region of Vietnam.

The district capital lies at Mường Xén.

[1] Kỳ Sơn borders Xam Neua in the north, Nong Het and Mok May in the west, Khamkeut and Viengthong in the south, and Tương Dương in the east.

In the past, Kỳ Sơn was best known for opium poppy growing.

This article about a location in Nghệ An Province, Vietnam is a stub.