John Vincent Cable, known as Vince Cable (born 9 May 1943) is a British politician, and was the acting leader of the Liberal Democrats until the election of Nick Clegg. He is Member of Parliament for Twickenham and has been the Liberal Democrats' main economic spokesperson since 2003, having previously served as Chief Economist for the oil company Shell from 1995 to 1997. He was elected as deputy leader of the Liberal Democrats in the House of Commons in March, 2006. He was acting leader of the Liberal Democrats on 15 October 2007 following Sir Menzies Campbell's resignation, but announced soon after that he would not be a candidate in the leadership election.

Cable was born in York and attended Nunthorpe Grammar School. He went on to study Natural Sciences and Economics at Fitzwilliam College, Cambridge and was elected President of the Cambridge Union in 1965. He later received a PhD in Economics from the University of Glasgow where he subsequently lectured for a time in addition to having lectured London School of Economics students.

From 1966 to 1968 he was a Treasury Finance Officer to the Kenyan Government, and married Dr Olympia Rebelo; they subsequently had three children. Dr Rebelo died of breast cancer in 2001.