Sir Graham Robert Watson (born 23 March 1956) is a British Liberal Democrat politician. He served as a Member of the European Parliament for South West England from 1994 until 2014 and was the leader of the Group of the European Liberal Democrat and Reform Party 2002–2004 and the first leader of the Group of the Alliance of Liberals and Democrats for Europe 2004–2009. Since 2011, he has been the President of the European Liberal Democrat and Reform Party.