The Bungdang (Korean: 붕당; Hanja: 朋黨) refers to political factionalism that was characteristic of the middle and late Joseon dynasty in Korea.

[1] Following these setbacks, the Sarim faction withdrew to rural provinces where they maintained their power base and ideological continuity through seowon (private institutions which combined the functions of a Confucian shrine and a preparatory academy for the civil service examinations) and hyangyak (a system of social contract that gave local autonomy to villages).

The Easterners were largely based in Yeongnam; as for its subfactions, the Southerners were mainly followers of Yi Hwang, while the Northerners coalesced around the school of Jo Sik.

[1] After the elimination of the Byeokpa, Joseon politics in the 19th century shifted significantly, and the dynasty began to crumble as in-law families, rather than scholarly factions, came to dominate the throne.

In the South Korean TV drama Yi San (2007), the Noron faction is portrayed as the chief enemy of King Jeongjo and as the antagonist of the series.

The faction made his father, Crown Prince Sado, die while fallen from grace, and tried to shame and kill King Jeongjo throughout his life and reign.