National Assembly Building, Parliament building in Yeouido, South Korea

The National Assembly Building is a white, multi-storey parliament in Yeouido, Seoul, with a flat facade divided by tall plain columns and rows of identical rectangular windows. A shallow, pale-green ribbed dome sits centred on the roof, and a dark brown lattice grille is recessed between two central columns above the ground-level entrance. The plenary chamber seats 400.

The current building was completed in 1975, replacing the colonial-era Bumingwan, which the government had used until then and which now houses the Seoul Metropolitan Council. Nine presidential inaugurations have been held here, from Roh Tae-woo in 1988 to Lee Jae-Myung in 2025. In December 2024, troops sent by President Yoon Suk-yeol stormed the building during martial law; staff and civilians kept them from the session hall, and lawmakers voted the declaration down.

The building's name in Korean is 국회의사당, and its plenary chamber was fitted with 400 seats, more than the lawmakers then sitting, in case reunification brings new representatives from the North. The hall has hosted presidential inaugurations, from Roh Tae-woo in 1988 to Lee Jae-Myung in 2025.

Visitors must book guided tours in advance to enter the library and plenary chamber. The visitor center provides general information and helps with navigation inside the building.

The chamber contains more seats than currently needed to accommodate future additional representatives. This reserve capacity was built with potential reunification with the North in mind.