Denis Smyth (born 1948) is professor of History at the University of Toronto. His doctorate is from the University of Cambridge. While at Cambridge he studied under F.H. Hinsley, a noted scholar of the Second World War. He is a specialist in modern international relations, particularly the period surrounding World War II and the Spanish Civil War. Among his major works is a monumental collected edition of previously classified British documents from the period just after World War II.