Francis Martin-Xavier Campbell (born 20 April 1970) is a British diplomat and academic. Since 2014, he has been Vice-Chancellor of St Mary's University, Twickenham, London. From 2005 to 2011, he was the British Ambassador to the Holy See. He is an Honorary Fellow of St Edmund's College, Cambridge. He will join the University of Notre Dame Australia as Vice-Chancellor commencing January 2020.