House of Yi

House of Yi
Parent house	Jeonju Yi clan
Country	Joseon Korean Empire
Founded	5 August 1392 (Joseon's founding)
Founder	Taejo of Joseon
Current head	Prince Yi Won Yi Seok (disputed)
Final ruler	Sunjong of Korea
Titles	King of Joseon Emperor of Korea
Deposition	29 August 1910
Cadet branches	125 cadet branches (approximately 105 extant) including: House of Grand Prince Jinan House of Grand Prince Yangnyeong House of Grand Prince Hyoryeong House of Prince Milseong House of Grand Prince Gwangpyeong House of Deokheung Daewongun

The House of Yi, also called the Yi dynasty (also transcribed as the Lee dynasty), was the royal family of the Joseon dynasty and later the imperial family of the Korean Empire, descended from the Joseon founder Yi Seong-gye. All of his descendants are members of the Jeonju Yi clan.

After the Japan–Korea Treaty of 1910, in which the Empire of Japan annexed the Korean Peninsula, some members of the Jeonju Yi clan were incorporated into the Imperial House of Japan and the Japanese peerage by the Japanese government.^[1][2] This lasted until 1947, just before the Constitution of Japan was promulgated.^[3] The treaty was nullified in the Treaty on Basic Relations between Japan and the Republic of Korea.

With the Constitution succeeding to the Provisional Government,^[4] the descendants of the Imperial Family continue to be given preference and constitute a favored symbol in South Korea. The July 2005 funeral of Yi Ku, former head of the royal household, attracted considerable media coverage. Yi Seok also caught attention as of the 100th anniversary of Korean independence^[5] on March 1, 2019.