Ottokar Chiari (1 February 1853 – 12 May 1918) was an Austrian laryngologist and professor at the University of Vienna who was a native of Prague. At Vienna he was an assistant to Leopold von Schrötter (1837–1908), and later succeeded Karl Stoerk (1832–1899) as director of the laryngological clinic. He was the son of gynecologist Johann Baptist Chiari (1817–1854), and a younger brother to pathologist Hans Chiari (1851–1916). In 1932, the Chiarigasse in Favoriten-Vienna was named in his honor.