| Queen Hyogong 효공왕후 | |
| Succession: | Queen consort of Joseon (Posthumously) |
| Predecessor: | Dynasty established (Queen Consort Han as the last posthumously Queen Consort of Goryeo) |
| Successor: | Queen Consort Choi |
| Birth Date: | 1207 |
| Birth Place: | Goryeo |
| Burial Place: | Alleung tomb[1] |
| Spouse: | Mokjo of Joseon (m. 1223) |
| Issue: | 6 sons |
| House: | Pyeongchang Yi (by birth) Jeonju Yi (by marriage) |
| Father: | Yi Gong-suk |
| Mother: | Lady Jeong |
Queen Hyogong of the Pyeongchang Yi clan (; 1207–?) was the wife Yi Ansa and mother of Yi Haengni, making her became great-grandmother to Yi Jachun who was the father of Yi Seonggye, Joseon's founder.[2] Among the Joseon queens, she was the only one who came from the Yi clan and honoured as Hyo-Bi at first.
Her 4th great-grandfather was Yi Gwang, Prince Baekoh (; 1126–1170) from Pyeongchang-gun, Gangwon Province. Because King Sejong disallowed a man and woman from the same clan to marry and any woman with the surname Yi,[3] she became the only Joseon Queen Consort whom came from a Yi clan in Joseon history.
In 28 July 1392, when Taejo established a new dynasty, she was granted the royal title Consort Hyo along with her husband whom was granted the title King Mok .[4] Later on 22 April 1411, King Taejong, gave her a posthumous name Queen Hyogong .[5] Her tomb was located in Alleung, Neung-ri, Gapyeong-myeon, Siheung-gun, Hamgyeongnam-do along with her husband.[6]