Nyang Mangpoje Shangnang (Tibetan: མྱང་མང་བོ་རྗེ་ཞང་སྣང་, Wylie: myang mang po rje zhang snang; ? – ?) was a general of the Tibetan Empire who served as Lönchen during Emperor Songtsen Gampo's reign. The Tibetan emperor Namri Songtsen was assassinated in 618. The young prince Gampo Songtsen came to the throne, and appointed Mangpoje as his regent. At that time, Tibet faced rebellion in its vassal kingdoms. It proved that Mangpoje was an excellent leader. He quickly put down the rebellion, captured all the mutineer leaders and put them to death. Then, he led a number of men in an invasion of the Sumpa, defeated them with very few casualties, and forced them to surrender. Tibet began to collect taxes in Sumba, and Mangpoje had very high reputation in Tibet.