Yuan Xi (died c.December 207^[2]), courtesy name Xianyi or Xianyong, was a Chinese military general and politician. He was the second son of Yuan Shao, a warlord who controlled much of northern China during the late Eastern Han dynasty.^[1] He was executed along with his brother Yuan Shang by Gongsun Kang.

Yuan Xi's wife, Lady Zhen, was taken as a wife by Cao Cao's son, Cao Pi, while Yuan Xi still lived.

Yuan Shuji, a Tang dynasty chancellor, was a descendant of Yuan Xi.

Yuan Xi was described in the 14th-century historical novel Romance of the Three Kingdoms as "intelligent but weak and indecisive", in contrast to his older brother Yuan Tan, who was described as "brave but impulsive and violent". After the combined forces of Yuan Xi and his younger brother Yuan Shang was defeated in battle against Cao Cao in the follow-up battles after the Battle of Guandu, he fled to Liaodong with Yuan Shang and stayed with administrator Gongsun Kang, hoping to one day take over Gongsun's forces and have their revenge on Cao Cao. However, they were themselves betrayed and were killed in an ambush set up by Gongsun, who instead wanted to join Cao's forces.

• Lists of people of the Three Kingdoms

• Chen, Shou (3rd century). Records of the Three Kingdoms (Sanguozhi).
• de Crespigny, Rafe (2007). A Biographical Dictionary of Later Han to the Three Kingdoms 23-220 AD. Leiden: Brill. ISBN 9789004156050.
• Fan, Ye (5th century). Book of the Later Han (Houhanshu).
• Pei, Songzhi (5th century). Annotations to Records of the Three Kingdoms (Sanguozhi zhu).
• Sima, Guang (1084). Zizhi Tongjian.