Hermann Senator (December 6, 1834 - July 14, 1911) was a German internist who was a native of Gnesen in the Prussian Province of Posen (now Gniezno, Wielkopolska, Poland).He studied medicine in Berlin, where he received his medical doctorate in 1857. Among his instructors in Berlin were Johannes Peter Müller (1801-1858), Johann Lukas Schönlein (1793-1864) and Ludwig Traube (1818-1876).