2008 South Korean legislative election

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All 299 seats to the National Assembly 150 seats needed for a majority
Turnout	46.08% (15.55pp; Const. votes) 46.08% (15.55pp; PR votes)
Majority party Minority party Third party   Leader Kang Jae-seop Son Hak-gyu Suh Chung-won Party Grand National United Democratic Pro-Park Last election 121 seats[a] 161 seats[b] Did not exist Seats won 153 81 14 Seat change 32 80 New Constituency vote 7,478,776 4,977,508 637,351 % and swing 43.45% (5.55pp) 28.92% (20.16pp) 3.70% (New) Regional vote 6,421,727 4,313,111 2,258,750 % and swing 37.48% (1.71pp) 25.18% (21.05pp) 13.18% (New)   Fourth party Fifth party   Leader Lee Hoi-chang Chon Young-sae Party Liberty Forward Democratic Labor Last election Did not exist 10 seats Seats won 18 5 Seat change New 5 Constituency vote 984,751 583,665 % and swing 5.72% (New) 3.39% (0.92pp) Regional vote 1,173,463 973,445 % and swing 6.85% (New) 5.68% (7.35pp)
Speaker before election Lim Chae-jung Uri Elected Speaker Kim Hyong-o Grand National

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Legislative elections were held in South Korea on April 9, 2008.^[1] The conservative Grand National Party won 153 of 299 seats while the main opposition United Democratic Party won 81 seats.^[2] This election marked the lowest-ever voter turnout of 46%.^[3]

The election was held under parallel voting, with 245 members elected in single-member constituencies via first-past-the-post voting and the remainder elected via proportional representation. Proportional seats were only available to parties which one three percent of the national valid vote among seat-allocated parties and/or won five or more constituency seats.

As of April 9, 2008, there were six political parties represented in the 18th National Assembly of South Korea, in addition to independents:

• Grand National Party (한나라당, Hannara-dang), led by Kang Jae-seop. The current major conservative party within the National Assembly. (153 seats won)
• United Democratic Party (통합민주당, Tongham Minju-dang), led by Son Hak-gyu. The current major liberal party within the National Assembly. (81 seats won)
• Liberty Forward Party (자유선진당, Jayu Seonjin-dang), led by Lee Hoi-chang. The Chungcheong Region-strongholder and current second conservative party within the National Assembly against the GNP. (18 seats won)
• Pro-Park Alliance (친박연대, Chin-bak Yeon-dae), led by Seo Cheong-won, although their inspirational leader is former GNP leader Park Geun-hye. A conservative coalition with Park Geun-hye within the National Assembly that broke away from the GNP after a dispute on the GNP's candidate nomination, which happened just before the election. (14 seats won)
• Democratic Labor Party (민주노동당, Minju Nodong-dang), led by Chun Young-se. A minor but the most progressive party within the 18th National Assembly, against both the Grand Nationals and Democrats. (5 seats won)
• Creative Korea Party (창조한국당, Changjo Hanguk-dang), led by Moon Kook-hyun. A minor but pro-environmental liberal party within the National Assembly, against the Grand Nationals. (3 seats won)
• (no seats) The New Progressive Party (진보신당) Jinbo Shin-dang), led by Sim Sang-jeong and Roh Hoe-chan, won 2.94% votes but not enough to gain any seats. The New Progressive Party split from the Democratic Labor Party as a reaction to nationalism after the 2007 presidential elections.