2000 South Korean legislative election

Legislative elections were held in South Korea on 13 April 2000.

Opinion polls suggested that the ruling Democratic Party would win the most seats, but the result was a victory for the conservative Grand National Party (GNP), which won 133 of the 299 seats in the National Assembly. The United Liberal Democrats (ULD) lost two-thirds of their seats due to GNP's victory in Gyeongsangbuk-do, Gangwon-do (South Korea), and also fewer local votes in Chungcheong.

With no party winning a majority, the 16th parliament was the first hung parliament in South Korean history.

The Democrats, ULD and Democratic People's Party (DPP) formed a coalition to gain a majority. However, the ULD withdrew support in 2001 and joined the conservative opposition. Seven ULD members subsequently defected from the party and joined the GNP, giving it a majority.

Electoral system
Of the 273 seats, 227 were elected in single-member districts via first-past-the-post voting, while the remainder were allocated via proportional representation at the national level. Proportional seats were only available to parties which won three percent of the national valid vote among seat-allocated parties and/or won five or more constituency seats.