Mark Christopher Field (born 6 October 1964) is a British politician who served as the Member of Parliament (MP) for Cities of London and Westminster from 2001 to 2019. A member of the Conservative Party, he served as a Minister of State at the Foreign and Commonwealth Office from 2017 to 2019. A prominent supporter of the United Kingdom remaining in the European Union during the Brexit referendum and of Jeremy Hunt in the 2019 Conservative Party leadership election, he left his post as a Foreign Office Minister when Boris Johnson's premiership began. He stood down from the British House of Commons at the 2019 United Kingdom general election.