Mario Giacinto Peracca (21 November 1861, Turin – 23 May 1923, Turin) was an Italian herpetologist. He discovered zoology through his father, an amateur ornithologist. He started taking medical classes at the University of Turin, with his studies eventually turning to zoology. In 1886, he obtained his degree from the university under the direction of Michele Lessona (1823-1894). After graduation, he remained in Turin as an assistant to Lessona, and later Lorenzo Camerano (1856-1917), at the zoological institute. Here he worked until his retirement in 1920.