John Brooke (4 May 1920 – 1985) was a British historian.[1] He studied history at the Victoria University of Manchester under Lewis Namier and, in 1951, became Namier's principal assistant for the History of Parliament.[2] When Namier died in 1960, Brooke succeeded him as editor of the section dealing with 1754 to 1790.[3] From 1964, he was Senior Editor of the Royal Commission on Historical Manuscripts. He was co-author with Namier of a biography of Charles Townshend, and author of The Chatham Administration, a study of politics in the early years of George III's reign. He was also the author of a leading biography of King George III, published in 1972. Brooke died in 1985.[4][5]