Charles Lethbridge Kingsford (25 December 1862 – 29 November 1926) was a scholarly English historian and author.
The third son of the Rev. Sampson Kingsford, formerly Fellow of St. John's College, Cambridge, and vicar of St. Hilary, Cornwall, he was born at Ludlow, Shropshire, where his father was then headmaster at its grammar school, on December 25 (Christmas Day), 1862.
He was sent to Rossall School, and went up to St John's College, Oxford, as a scholar, and obtained honours in the classical schools and in modern history. In 1888 he was awarded the Arnold prize for an essay on "The Reformation in France," and in the following year he joined the editorial staff of the Dictionary of National Biography. In 1890 he was appointed an examiner in the Education Department, and was an assistant secretary from 1905 to 1912, when he resigned after internal reorganization made work less congenial.
During the First World War, he served as a special constable in London, for which he received the Special Constabulary Long Service Medal with clasp. He was later employed as private secretary to Sir Arthur Boscawen at the Ministry of Pensions from 1917 to 1918.
Kingsford was vice-president of the Society of Antiquaries of London, 1920-3, Ford Lecturer on English History at Oxford, 1923-4, and a vice-president of the Royal Historical Society and the London Topographical Society. In 1924 he was elected a fellow of the British Academy.