Democritus (c. 460–370 BC) was an Ancient Greek philosopher notable for his atomic theory of the universe.
Democritus may also refer to: Democritus (Agostino Carracci), a c.1596 oil on canvas painting Democritus (Ribera), a 1630 oil on canvas painting by Jusepe de Ribera Democritus (crater), an impact crater on the Moon Christianus Democritus, pen name of Johann Konrad Dippel (1673–1734), German Pietist theologian, physician, alchemist and occultist Democritus of Megara, winner of the Stadion race, 152nd Olympiad, 172 BC
See also Democritus University of Thrace