Sir John Edward Lloyd (5 May 1861 – 20 June 1947) was a Welsh historian, He was the author of the first serious history of the country's formative years, A History of Wales from the Earliest Times to the Edwardian Conquest (1911).
Another of his great works was Owain Glendower: Owain Glyn Dwr (1931).
For his achievements in the field, he was made a Knight Bachelor in 1934.
Under his editorship, the first edition of the Dictionary of Welsh Biography was compiled, though not published until after his death (1950).