The Bunun (), also historically known as the Vonum, are a Taiwanese indigenous people. They speak the Bunun language. Unlike other aboriginal peoples in Taiwan, the Bunun are widely dispersed across the island's central mountain ranges. In the year 2000, the Bunun numbered 41,038. This was approximately 8% of Taiwan's total indigenous population, making them the fourth-largest indigenous group. They have five distinct communities: the Takbunuaz, the Takituduh, the Takibaka, the Takivatan, and the Isbukun.
According to a study published in 2014, the Y-DNA of the Bunun people belongs mainly to haplogroup O1a2-M50 (34/56 = 60.7%) or haplogroup O2a1a-M88 (21/56 = 37.5%), with a single representative of haplogroup P*-M45(xQ-M242, R-M207) (1/56 = 1.8%). Haplogroup O-M88 is rare among other aboriginal peoples of Taiwan and its vicinity, being found more commonly among populations of southwestern China and the northern parts of Mainland Southeast Asia, such as Tai peoples and Vietnamese.
Until the coming of the Christian missionaries in the beginning of the 20th century, the Bunun were known to be fierce warriors and headhunters. The Bunun were one of the "high-mountain peoples" (along with the Atayal and the Taroko) who traditionally lived in small family units in Taiwan's Central Mountain Range and were hostile to all outsiders, whether they be Chinese immigrants or surrounding aboriginal peoples. Whereas most other aborigines were quite sedentary and tended to live in lower areas, the Bunun, along with the Atayal and Taroko were constantly on the move in Taiwan's Central Mountain Range, looking for new hunting grounds and practicing slash-and-burn agriculture. Their staple foods were millet, yam, and game.
During the Japanese rule (1895–1945), the Bunun were among the last peoples to be "pacified" by the Japanese government in residence. After an initial period of fierce resistance, they were forced to move down from the mountains and concentrated into a number of lowland villages that were spread across the Island.