Curt Eisner (April 28, 1890 in Zabrze – December 30, 1981 in The Hague) was a German entomologist who specialised in snow butterflies or Parnassinae. His collections of Parnassinae are in Naturalis, in Leiden, and his Ornithoptera and Morphidae are in the Museum für Naturkunde in Berlin.In the 1930s he lived in Berlin Dahlem.