George Ronald Lewin CBE (11 October 1914 – 6 January 1984), professionally known as Ronald Lewin, was a British military historian, radio producer and publishing editor.
He was educated at Heath School in Halifax and The Queen's College, Oxford where he was a Hastings Scholar and Goldsmiths’ Exhibitioner. He was an editorial assistant at Jonathan Cape from 1937, and served in the Royal Artillery in North Africa and Northwest Europe 1939-45.
He wrote several books on World War II and commanders e.g. Rommel, Montgomery, Vyvyan Pope, Wavell and Slim (Slim the Standard-Bearer received the WH Smith Literary Award). He wrote two books on Ultra (Europe) and The Other Ultra (Japan).