Dong Yun (died c.December 246[2]), courtesy name Xiuzhao, was a Chinese general and politician of the state of Shu Han during the Three Kingdoms period of China.

Dong Yun was one of four persons who held positions equivalent to a head of government in Shu from 221 to 253; the other three were Zhuge Liang, Jiang Wan and Fei Yi.

As the troops gathered at the staging area in Hanzhong Commandery, Zhuge Liang was worried that Liu Shan was still young and not mature enough to make good judgments.

[10] In his Chu Shi Biao (literally "memorial on the case to go to war"), Zhuge Liang named Dong Yun, Fei Yi and Guo Youzhi as examples of trustworthy, loyal and competent officials who could provide good advice and assist Liu Shan in governing Shu more effectively.

[11] Not long later, Zhuge Liang nominated Dong Yun to serve as a Palace Attendant (侍中), commissioned him as a General of the Household (中郎將) and put him in command of the huben division of the imperial guards.

[12] As his colleague Guo Youzhi, who also held the position of a Palace Attendant, tended to be mild-tempered and non-confrontational when dealing with people, the burden of advising the emperor Liu Shan and speaking up on difficult issues largely rested on Dong Yun's shoulders.

[15] As Liu Shan grew older, he started to favour the palace eunuch Huang Hao, who actively fawned on the emperor in a concerted attempt to rise to higher positions and gain greater power in the Shu government.

[16] When Dong Yun learnt about this, he openly criticised the emperor for showing favouritism towards Huang Hao and, at the same time, severely reprimanded the eunuch for his behaviour.

[1] At the time, the people of Shu named Zhuge Liang, Jiang Wan, Fei Yi and Dong Yun as the four heroic chancellors of their state.