Yumbulagang (Tibetan: ཡུམ་བུ་བླ་སྒང།, Wylie: yum bu bla sgang) or Yumbu Lakhar (Tibetan: ཡུམ་བུ་བླ་མཁར།, Wylie: yum bu bla mkhar) is the original palace of the Yarlung Dynasty kings of Tibet. In Tibetan mythology, it was the first building in Tibet, and was the palace of the legendary first Tibetan king, Nyatri Tsenpo who is said to have reigned from 127 BCE.
Yumbulagang stands on a hill at a bend along the Yarlung Tsampo River, on the eastern bank of the Yarlung Valley of southeast Lhokha, about 192 kilometres (119 mi) southeast of Lhasa and 9 kilometres (5.6 mi) south of Tsetang. The palace and its shrine were demolished during the 1966-1976 Cultural Revolution, and the palace has been partially rebuilt.