Dugu Sun (Chinese: 獨孤損) (died July 5, 905), courtesy name Yousun (又損), was an official of the Chinese Tang dynasty, serving as a chancellor during the reigns of Emperor Zhaozong and Emperor Zhaozong's son Emperor Ai, near the end of the dynasty. He was killed in a purge of high-level Tang officials by the warlord Zhu Quanzhong the military governor (Jiedushi) of Xuanwu Circuit (宣武, headquartered in modern Kaifeng, Henan), who was then preparing to seize the throne.