Hugo Magnus (31 May 1842 in Neumarkt in Schlesien – 15 April 1907 in Breslau) was a German ophthalmologist and historian of medicine. He was of Jewish ancestry. He studied medicine at the University of Breslau, where he was a pupil of Albrecht Theodor Middeldorpf and Hermann Lebert. In 1867 he received his medical doctorate, and in 1873 qualified as a lecturer in ophthalmology. In 1883 he became an associate professor at the University of Breslau.