Karl Borromaeus Maria Josef Heller (21 March 1864, Rappoltenkirchen, Tulln (district) – 25 December 1945, Dresden), was an Austrian entomologist who specialised in Coleoptera. He was a Professor and Section leader in the Staatliches Museum für Tierkunde Dresden where his collection is maintained. Heller was a taxonomist. He described many new species of world fauna. He was a Member of the Stettin Entomological Society.