Hyegong (758–780), personal name Kim Kŏn-un, was the 36th ruler of the Korean kingdom of Silla.
Because of this, Hyegong's reign is often regarded as the end of the middle period of the Silla state.
[1] According to the Samguk sagi, Hyegong's dissolute life as a young monarch kept the palace in disarray.
They faced rebellions led by high officials (Kim Daegong and others) in 768, 770 and 775.
Faced in 780 with another rebellion led by his ichan Kim Chi-jŏng, the monarch dispatched sangdaedeung Kim Yang-sang to put down the uprising, but the rebel forces managed to storm the palace and assassinated Hyegong and other royal family members.