| Crown Prince Hyomyeong 효명세자 | |
|---|---|
 Portrait of Crown Prince Hyomyeong, damaged during the 1954 Busan Yongdusan fire | |
| Regent of Joseon | |
| Tenure | 17 January 1827 – 6 May 1830 |
| Monarch | Sunjo of Joseon |
| Crown Prince of Joseon | |
| Tenure | 6 July 1812 – 6 May 1830 |
| Predecessor | Crown Prince Yi Gong |
| Successor | Crown Prince Yi Cheok |
| Born | 18 September 1809 Daejojeon Hall, Changdeokgung, Hanseong, Joseon |
| Died | 25 June 1830 (aged 20) Huijeongdang Hall, Changdeokgung, Hanseong, Joseon |
| Spouse | Queen Sinjeong |
| Issue | Heonjong of Joseon |
| Clan | Jeonju Yi |
| Dynasty | Yi |
| Father | Sunjo of Joseon |
| Mother | Queen Sunwon |
| Korean name | |
| Hangul | 효명세자 |
|---|---|
| Hanja | 孝明世子 |
| Revised Romanization | Hyomyeong Seja |
| McCune–Reischauer | Hyomyŏng Seja |
| Birth name | |
| Hangul | 이영 |
| Hanja | 李旲 |
| Revised Romanization | I Yeong |
| McCune–Reischauer | I Yŏng |
Crown Prince Hyomyeong (18 September 1809 – 25 June 1830), personal name Yi Yeong, and posthumously honored as King Munjo, was a member of the Joseon dynasty.