Shunmugam Jayakumar, often known as S. Jayakumar, is a former Singaporean politician, lawyer and diplomat. He is of Indian Tamil ancestry.
A former member of the governing People's Action Party (PAP), he previously served as Singapore's Senior Minister in the Cabinet and the Co-ordinating Minister for National Security from 2009 to 2011, Deputy Prime Minister from 2004 to 2009, Minister for Foreign Affairs from 1994 to 2004, Minister for Home Affairs from 1988 to 1994, Minister for Law from 1988 to 2008, and Minister for Labour from 1984 to 1985.
He was a member of parliament (MP) for the constituency of Bedok within the East Coast Group Representation Constituency. In May 2011 he retired from politics due to health reasons.
