Árpád von Degen (born 31 March 1866 in Pozsony (now Slovakia)), was a Hungarian biologist and botanist whose activities were rooted in theoretical principles and scientific botany. Head of the royal Seed Testing Station in Budapest from 1896, Professor of Botany at the Budapest University from 1927 and member of the Hungarian Academy of Sciences, he died on 30 March 1934 in Budapest.