Wonjong (5 April 1219 – 23 July 1274), personal name Wang Chŏng, was the 24th ruler of the Goryeo dynasty of Korea, reigning from 1260 to 1274.
His rule was briefly interrupted by that of King Yeongjong in 1269, although the legitimacy of the latter is disputed by scholars.
Having the Goryeo crown prince come before him to concede after decades of fighting, Kublai Khan was jubilant and said "Goryeo is a country that long ago even Tang Taizong personally campaigned against but was unable to defeat.
[4] During his reign, Goryeo became a vassal of the Mongol-founded Yuan dynasty in China.
[5] In 1269, the military leader Im Yon engineered a coup d'état to remove Wonjong.