Dalto is a surname. Notable people with the surname include:
Gustavo Dalto (born 1963), Uruguayan football player and manager Jorge Dalto (1948–1987), Argentine musician Mauro Da Dalto (born 1981), Italian professional road bicycle racer
See also Dalto (composer), (born 1949), stage name of Dalto Roberto Medeiros, Brazilian composer and singer Dalto (Driebergen), a Dutch korfball club