| Yi Haengni 이행리 李行里 | |
| King of Joseon (posthumously) | |
| Succession: | Darugachi |
| Reign: | 1300–? |
| Birth Name: | Yi Haengni (이행리) |
| Birth Date: | 1236 |
| Birth Place: | Wonsan, Gangwon Province, Goryeo |
| Death Date: | Wonsan, Gangwon Province, Goryeo |
| Burial Place: | Jireung tomb |
| Spouse: | Lady Son Queen Jeongsuk (m.1250) |
| Issue: | 9 sons and 1 daughter |
| Posthumous Name: |
|
| Temple Name: | Ikjo (익조, 翼祖) |
| Royal House: | House of Yi |
| Father: | Mokjo of Joseon |
| Mother: | Queen Hyogong of the Pyeongchang Yi clan |
Yi Haeng-ni (; 1236–?) was the great-grandfather of Yi Seonggye, the founder of the Joseon Dynasty.[1]
After his death, he was given the temple name Ikjo by his great-great-grandson, King Taejong[2] and his tomb was located in Jireung, Anbyeon County, South Hamgyeong Province. Meanwhile, his wife, Queen Jeongsuk was buried in Sukneung, Muncheon County, South Hamgyeong Province.