The Buyunda (Russian: Буюнда) is a river in Magadan Oblast, Russian Far East. It is a right tributary of the Kolyma, with a length of 434 kilometres and a drainage basin of 24,800 square kilometres.
Together with the Seymchan that flows roughly southwards on the facing bank of the Kolyma basin, the Buyunda forms the Seymchan-Buyunda Depression, which limits the Upper Kolyma Highlands from the east.
The name of the Buyunda originated in the Evenki language, meaning where there are wild deer.
