Harry Munroe Napier Hetherington Irving (1905 – 1993 in Cape Town), often cited as H. M. N. H. Irving, was a British chemist.
Irving received his PhD in 1930 from Oxford University, the same year he received his Licentiate of the Royal Academy of Music. Between 1930-1961 Irving was employed as a lecturer and demonstrator in chemistry at Oxford University, and during the 1940s began research into coordination chemistry. In 1953, Irving and his doctoral student Robert Williams described a periodic trend now known as the Irving–Williams Series. Irving was Chair of Inorganic and Structural Chemistry at the University of Leeds between 1961 and 1971, and Chair of Analytical Science at the University of Cape Town between 1979 and 1985.