de Bary is a surname, and may refer to:
Amy-Cathérine de Bary (born 1944), Swiss equestrian August de Bary (1874–1954), German physician and politician from Frankfurt Heinrich Anton de Bary (1831–1888), German scientist Jakob Erckrath de Bary (1864–1938), German fencer William Theodore de Bary (1919–2017), American sinologist and East Asian studies expert
See also de Barry (surname)