Sir Roger William Houssemayne Du Boulay KCVO CMG (20 March 1922 – 14 April 2020) was a British diplomat who served as Vice-Marshal of the Diplomatic Corps.
On 6 November 1942, he was commissioned into the Royal Air Force Volunteer Reserve, and saw active service in the Second World War.
After the war Du Boulay joined the Colonial Service, and served in Nigeria between 1949 and 1958.
In 1959 he joined Her Majesty's Diplomatic Service, and held appointments in Washington, the Foreign Office, Manila and Paris.
[2] On 12 December 1975 he became Vice-Marshal of the Diplomatic Corps, retaining the post until 9 April 1982.