de Toni (sometimes capitalized as "De Toni") is an Italian surname. Notable people with the surname include:
Giovanni Battista de Toni (1864–1924), Italian botanist, mycologist, and phycologist Manuel de Toni (born 1979), Italian ice hockey player Lino De Toni (born 1972), Italian ice hockey player Caroline de Toni (born 1986), member of the Chamber of Deputies of Brazil Simon de Tosny, also spelled Toni, 12th-century English Cistercian monk and prelate, Abbot of Coggeshall and Bishop of Moray
See also Toni (surname)