Aejang of Silla (788–809) (r. 800–809) was the 40th ruler of the Korean kingdom of Silla. He was the eldest son of King Soseong and Queen Gyehwa. He married a lady of the Pak clan.
In 802, Aejang had the great temple of Haeinsa built on Gayasan. In 803, he formed an alliance with Wa. In 806, he forbade the building of new temples. In 809, he was slain by his uncle Kim Eon-seung, who had been regent and took the throne for himself. year 809, the aejangwang and his brother chemyeong was killed.