Otto Ferdinand Georg Kern (14 February 1863 in Schulpforte (now part of Bad Kösen) – 31 January 1942 in Halle an der Saale) was a German classical philologist, archaeologist and epigraphist. He specialized in the field of ancient Greek religion, being known for his investigations of Greek mystery cults and Orphism, as well as the ancient city of Magnesia on the Maeander and later also the history of ancient studies. In 1907 he became professor at the University of Halle-Wittenberg, where he became rector in 1915/16.