Silseong (died 417) (r. 402–417), whose name is also given as Silju or Silgeum, was the 18th ruler of the Korean kingdom of Silla.
He was the son of the general (gakgan) Kim Daeseoji, who was the younger brother of King Michu.
Because Naemul's sons were still young, the nobles of the kingdom placed Silseong on the throne.
[1] After being crowned in 402, Silseong established an alliance with Wa and sent Naemul's son Kim Misaheun there as a hostage.
He tried to kill another possible heir, Kim Nulji, but ended up dying himself.