Alfred Otto Herz (14 October 1856 Hoyerswerda, Silesia -12 July 1905) was a German entomologist who specialised in Lepidoptera and Coleoptera. He was employed as a collector and preparator by the Otto Staudinger - Andreas Bang-Haas insect dealership in Dresden.
Otto Herz went on entomological expeditions to Transcaucasia , Buchara , Persia, Kamchatka, "Jakutien" (on a Mammoth collecting expedition), China, Korea , Japan, Hainan , and Siam partly funded by Nicholas Mikhailovich Romanoff who also purchased material directly from Herz or through Staundinger.
Many of the Lepidoptera collected by Herz were described by Sergei Alphéraky.His collected insects are in the Zoological Museum of the Russian Academy of Science (including the Romanoff insects) other than that sold elsewhere by the dealership.