King Gogugwon of Goguryeo (?-371, r. 331-371) is the 16th king of Goguryeo, the northernmost of the Three Kingdoms of Korea.

He wis the son of King Micheon and Lady Ju.

He's birth name is Sa-Yu.

He is made crown prince in 314 and becomes king upon his father's death.

He is called Emperor Soyeol in the Chinese history text Suishu, but this appears to be a mistaken transcription of the earlier Weishu.

At the same time, Tuoba Yihuai is the Lie Emperor of the Dai State.