Li Deyu () served as chancellor () during the Tang dynasty. He was the leader and namesake of the Li faction during the Niu-Li Factional Struggles that pitted officials of humble and aristocratic origins against each other. Tang Emperor Xuānzong ended the struggles by handing complete defeat to the Li faction, demoting Li Deyu and sending him to exile in Hainan, where he held the position of census officer at Yai Prefecture (modern Haikou) and remained until his death.
