Elizabeth Pakenham, Countess of Longford, CBE (née Harman; 30 August 1906 – 23 October 2002), better known as Elizabeth Longford, was an English historian. She was a member of the Royal Society of Literature and was on the board of trustees of the National Portrait Gallery in London. She is best known as a historian, especially for her biographies of 19th-century figures including Queen Victoria (1964), Lord Byron (1976) and the Duke of Wellington (1969).