Helge Otto Aars Groth (28 August 1913 – 1966) was a Norwegian literary historian and diplomat. He was born in Stavanger, and took the cand.philol. degree in 1938. He was a lecturer in European literature at the University of Oslo from 1939 to 1953, and also as held lectures on foreign affairs in Norwegian Broadcasting Corporation radio from 1946 to 1953. Books include Hovedlinjer i mellomkrigstidens norske litteratur (1947) and Olav Aukrust, Problematikk og utvikling (1948).