Munseong (died 857), personal name Kim Kyŏng-ŭng, was the 46th ruler of the Korean kingdom of Silla.
Munseong's reign was typical of late Unified Silla, with rampant strife and uprisings.
[1] The earlier part of his reign was marked by relatively active trade and commerce with both Japan and Tang China.
This was due to Jang Bogo's role in securing the major shipping routes.
Upon his death in 857, King Munseong was buried in the Gongjakji tomb precinct in Gyeongju.