Otto Benndorf (13 September 1838 – 2 January 1907) was a German-Austrian archaeologist who was a native of Greiz, Principality of Reuss-Greiz.
From 1864 to 1868 he was a member of a scientific expedition that toured Italy (Rome), Sicily, Greece and Asia Minor.
[1] In 1868 he obtained his habilitation at the University of Göttingen under the guidance of Friedrich Wieseler (1811–1892).
Among his students at Vienna were Michael Rostovtzeff (1870–1952), Emil Szántó (1857–1904), Julius von Schlosser (1866–1938) and Franz Studniczka (1860–1929).
In 1881–82, he excavated the so-called "Heroon of Trysa" in Lycia, shipping more than 100 boxes of material to the Kunsthistorisches Museum in Vienna.