List of Famous people named Sir

Mark Philip Sedwill, Baron Sedwill is a British diplomat and senior civil servant who served as Cabinet Secretary and Head of the Home Civil Service to Prime Ministers Theresa May and Boris Johnson from 2018 to 2020. He also served as the United Kingdom National Security Adviser from 2017 to 2020. He was previously the United Kingdom's Ambassador to Afghanistan from 2009 to 2010 and the NATO Senior Civilian Representative in Afghanistan in 2010. He was the Permanent Secretary at the Home Office from February 2013 to April 2017.

Sir Richard Worsley, 7th Baronet, was a British politician who sat in the House of Commons between 1774 and 1801. He was a noted collector of antiquities.

Sir Ewan Forbes of Craigievar, 11th Baronet was a Scottish nobleman, general practitioner and farmer. Due to the presence of an intersex condition at birth, he was christened Elizabeth Forbes-Sempill, and officially registered as the youngest daughter of John, Lord Sempill. After an uncomfortable upbringing, he began living as a man at the start of his medical career in 1945. He formally re-registered his birth as male in 1952, adopting the name of "Ewan Forbes-Sempill", and was married a month later.

Sir Richard Sutton, 1st Baronet, of Norwood Park in Nottinghamshire, was a British politician who sat in the House of Commons from 1768 to 1796.

Sir Henry Urmston Willink, 1st Baronet, was a British politician and public servant. A Conservative Member of Parliament from 1940, he became Minister of Health in 1943. During his time in power he was appointed Special Commissioner for those made homeless by the London Blitz and was involved with the production of the Beveridge Report.

Sir David Mathew (1400–1484; born Dafydd ap Mathew, was a Welsh Knight. He was Lord of Llandaff and Seneschal of Llandaff Cathedral, and one of the ten Great Barons of Glamorgan, a Marcher Lord. It was said he was one of the most distinguished men of his age and a zealous supporter of the Yorkist cause. After saving the life of King Edward IV at the Battle of Towton in 1461, he was appointed Grand Standard Bearer of England and King Edward IV granted the use of 'Towton' on his arms.

Sir George Burns, 1st Baronet was a Scottish shipping magnate.

Sir Robert Peel, 1st Baronet was a British politician and industrialist and one of early textile manufacturers of the Industrial Revolution. He is one of ten known British millionaires in 1799.

Captain Sir John Norman Ide Leslie, 4th Baronet, known locally as Jack Leslie, was the eldest son of Sir John Randolph Leslie, 3rd Baronet, and Marjorie Ide. He became the fourth baronet when his father died in 1971.

Sir Nicholas Kemeys, 1st Baronet was a Welsh landowner and soldier during the English Civil War in South Wales and played a key part in events in the region during that conflict.