August Müller or Mueller include:
August Friedrich Müller (1684–1761), German legal scholar and logician August Eberhard Müller (1767–1817), German composer, organist and choir leader August Müller (inventor) (1864–1949), German pioneer in the manufacture of contact lenses August Müller (orientalist) (1848–1892), German orientalist August Müller (ornithologist) (1853–1913), German natural history dealer, entomologist and ornithologist August B. Mueller (1905–1996), American politician from Minnesota
See also Auguste Müller (1847-1930), a German folk carver