The Dulgalakh (Russian: Дулгалах; Yakut: Дулҕалаах, Dulğalaax) is a river in Yakutia, the left, western source river of the Yana. Its length is 507 km and its basin size 27,300 square kilometres.
The Dulgalakh rises on the central Verkhoyansk Range, south of the southern slopes of the Arkachan Plateau. It flows through Kobyaysky and Verkhoyansky districts. Above Verkhoyansk it merges with the Sartang forming the Yana.
