|Sir Derek Oulton
|Clerk of the Crown in Chancery|
|Prime Minister||Margaret Thatcher|
|Succeeded by||Sir Thomas Legg|
|Born||14 October 1927|
|Died||1 August 2016(aged 88)|
|Alma mater||King's College, Cambridge|
Sir Antony Derek Maxwell Oulton GCB QC (14 October 1927 – 1 August 2016) was a British senior civil servant, who was Permanent Secretary of the Lord Chancellor's Department and Clerk of the Crown in Chancery, United Kingdom from 1982–1989.
He was called to the bar at Gray’s Inn (where he was later a Bencher), and was in private practice as a barrister in Nairobi until 1960, when he joined the Lord Chancellor’s Department. He was Private Secretary to three successive Lord Chancellors, the Earl Kilmuir, the Viscount Dilhorne, and Lord Gardiner, and also served as Secretary to the Beeching Royal Commission on Assizes and Quarter Sessions, 1966–69.
Oulton's final civil service position was as Permanent Secretary of the Lord Chancellor’s Department and Clerk of the Crown in Chancery 1982–89.
He was awarded a University of Cambridge PhD on the basis of a jointly-authored practitioner text on legal aid and advice, and after retiring from the civil service entered academia, becoming a Research Fellow of Magdalene College, Cambridge in 1990. He subsequently became a Life Fellow and, until his retirement in June 2007, supervised undergraduate students in constitutional law. Sir Derek received a standing ovation from the College Law Society following his retirement at the Annual Lawyers' Dinner in 2007. A bench sits beside the River Cam in the grounds of the College in his honour.
He died on 1 August 2016 at the age of 88.