There is only a record that his mourning was held as a state funeral by order of King Cheoljong, and the location of his burial and whether he was given a posthumous title are unknown.
On November 2, King Cheoljong personally named the gate of the Crown Prince's Palace "Igyegmun" (貳極門).
On April 23, 1859 (the 10th year of King Cheoljong's reign), he contracted a febrile illness and was attended by medical officials, but died suddenly.
On April 24, King Cheoljong declared the mourning of the Crown Prince (元子喪) and specially summoned the Minister of War and the Grand Marshal of Training.
[7] Although Yi Yung-jun died young, King Cheoljong's concubine, Lady Jo Gwi-in (貴人 趙氏), bore him two sons.