Yi junyong (or Lee Junyong, , hanja: , June 25 1870 - March 22, 1918) was a Korean politician. He was a member of the Joseon Dynasty royal family. He was the grandson of Heungseon Daewangun, and elder nephew of Emperor Kojong of the Korean empire. He was rival of his uncle Kojong 1874 to 1907. His title was 'Prince Youngseon' ().