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

[1] 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.

Seven ULD members subsequently defected from the party and joined the GNP, giving it a majority.

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.