Sir Nigel Hugh Robert Allen Broomfield KCMG (born 19 March 1937) is a retired British diplomat.
Broomfield was educated at Haileybury College and Trinity College, Cambridge. He joined the British Army and was commissioned in the 17th/21st Lancers in 1959, retiring with the rank of Major in 1968.
He joined the Foreign and Commonwealth Office (FCO) in 1969 and served in the British embassies in Bonn and Moscow, and with the British Military Government in Berlin, as well as senior posts at the FCO. He was Deputy High Commissioner, New Delhi, 1985–88; Ambassador to the German Democratic Republic 1988–90; Deputy Under Secretary of State (Defence) at the FCO 1990–92; and Ambassador to Germany 1993–97.
Broomfield was appointed CMG in 1986 and knighted KCMG in 1993.
After retiring from the Diplomatic Service, Sir Nigel was director of the Ditchley Foundation 1999–2004. He took part in the Atlantic Storm exercise in 2005. He was a non-executive director of TI Group 1998–2000 and of Smiths Group 2000–2007. He was also chairman of Leonard Cheshire Disability 2004-2009. He is honorary President of the German-British Chamber of Commerce. He is the founding non-executive Chairman of Cambridge Quantum Computing. 
Sir Christopher Mallaby
|British Ambassador to Germany
- Supplement to the London Gazette, 16 June 1959
- Supplement to the London Gazette, 31 December 1992
- Atlantic Storm participants - Nigel Broomfield
- Board of Directors, Smiths Group, 2006
- New Chairman for the charity Leonard Cheshire Disability, 13 July 2009
- Honorary Officers and Council, German-British Chamber of Industry & Commerce
- Cambridge Quantum Computing