Sir John Dixon Iklé Boyd KCMG (17 January 1936 – 18 October 2019) was a British ambassador and academic administrator. He was British ambassador to Japan from 1992 to 1996, and subsequently the Master of Churchill College, Cambridge from 1996 to 2006.

Boyd was born on 17 January 1936 to James Dixon Boyd and Amélie (née Lowenthal).^[1] His father would go on to be became Professor of Anatomy at the University of Cambridge.^[2] He was educated at Westminster School, an all-boys public school in central London.^[1] He attended Clare College, Cambridge, where he initially read medicine before moving to modern languages.^[3] He graduated with a Bachelor of Arts (BA) degree.^[1] He was then awarded a postgraduate scholarship to study in the United States, and attended Yale University to undertake foreign area studies and to study Mandarin.^[4] He graduated with a Master of Arts (MA) degree in 1962.^[1][5]

In 1968, Boyd married Gunilla Rönngren, a Swedish diplomat.^[1][2] They had two children,^[1] before divorcing in the 1970s.^[2] In 1977, he married Julia Raynsford.^[2] He had three daughters from his second marriage.^[3]

Boyd died on 18 October 2019, at the age of 83.^[11]

• Anglo-Japanese relations
• Foreign and Commonwealth Office
• Heads of the United Kingdom Mission in Japan