Hermann Müller may refer to: Hermann Müller (botanist) (1829–1883), German botanist with whom Darwin corresponded Hermann Müller (cyclist) (1911–?), German cyclist Hermann Müller (Thurgau) (1850–1927), Swiss botanist Hermann Müller (politician) (1876–1931), German Social Democratic politician and twice Chancellor of Germany Hermann Müller (athlete) (1885–1947), German race walker Hermann Müller (Idstein) (1935–2013), German politician, mayor of Idstein Hermann Joseph Muller (1890–1967), American geneticist and educator, Nobel laureate in Physiology and Medicine Paul Hermann Müller (1899–1965), Swiss chemist, Nobel laureate in Physiology and Medicine Hermann Paul Müller (1909–1975), German motorcycle and auto racer driver Herman Carl Mueller (1854–1941), German-born American ceramicist