Hans Zerny (11 June 1887, in Vienna-Währing – 14 September 1945, in Vienna) was an Austrian entomologist best known for his studies of Lepidoptera. He studied zoology at the University of Vienna, where in 1911, he obtained his PhD. Afterwards, he began work at the Naturhistorisches Museum in Vienna, serving as an adjunct-curator from 1920 and as curator-first class from 1928 onward. At the museum, he worked closely with Hans Rebel, whom he succeeded as keeper of the Lepidoptera collection following Rebel's retirement in 1932.