Otto Hildebrand (15 November 1858, in Bern – 18 October 1927, in Berlin) was a German pathologist and surgeon.
He was the son of economist Bruno Hildebrand (1812–1878) and the brother of sculptor Adolf von Hildebrand (1847–1921).
He studied anatomy and surgery at the University of Jena, and from 1886 served as assistant to Franz König at the University of Göttingen.
He was editor of the periodical Jahresbericht ĂĽber die Fortschritte auf dem Gebiete der Chirurgie and the author of several biographies in the Allgemeine Deutsche Biographie.
In 1895 he was the first to describe what would later be known as Warthin's tumor.