Kang Jae-sup (; born 28 March 1948) is a South Korean politician and former leader of Grand National Party since 11 July 2006. He was first been elected in 1988.

He was born in Uiseong, North Gyeongsang Province, South Korea.

Election results Year Elections Constituency Political party Votes (%) Results 1988 13th National Assembly General Election National (32nd) DJP 6,670,494 (33.96%) Elected 1992 14th National Assembly General Election Seo B (Daegu) DLP 44,117 (55.78%) Won 1996 16th National Assembly General Election Seo B (Daegu) NKP 20,950 (32.56%) Won 2000 16th National Assembly General Election Seo (Daegu) GNP 65,810 (62.03%) Won 2004 17th National Assembly General Election Seo (Daegu) GNP 62,392 (56.12%) Won 2011 2011 By-election Seongnam Bundang B (Gyeonggi) GNP 39,382 (48.31%) Defeated

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