Sun Hao (243 – January or February 284), courtesy name Yuanzong, originally named Sun Pengzu with the courtesy name Haozong, was the fourth and last emperor of the state of Eastern Wu during the Three Kingdoms period of China. He was the son of Sun He, a one-time heir apparent of the founding emperor Sun Quan. He ascended the throne in 264 after the death of his uncle, Sun Xiu (Emperor Jing), in light of the desire of the people to have an older emperor, considering the recent destruction of Wu's ally state Shu Han. However, he turned out to be a most unfortunate choice, as his cruelty, extravagance and inability to handle domestic matters doomed Wu, which was eventually conquered by the Jin dynasty in 280, ending the Three Kingdoms period.

Sun Hao is also known by other titles: Marquis of Wucheng (烏程侯), which he held before he became emperor; Marquis Guiming (歸命侯; literally "the Marquis who resigns to his fate"), the title given to him by the Jin dynasty after his surrender; Later Lord of Wu (吳後主) and Last Emperor of Wu (吳末帝), which were used by historians to refer to him.