George Islay MacNeill Robertson, Baron Robertson of Port Ellen (born 12 April 1946) is a Scottish politician. He is a member of the Labour Party. He served as the 10th Secretary General of NATO from 1999 to 2004. He served as Secretary of State for Defence from 1997 to 1999, before becoming a life peer as Baron Robertson of Port Ellen, of Islay in Argyll and Bute.