Dubly is a surname of French origin. Notable people with the surname include:

Maurice Dubly (1876–?), Léon Dubly (1878–?), Albert Dubly (1881–1949), André Dubly (1884–1972), Jean Dubly (1886–1942), and Raymond Dubly (1893–1988), five French footballers from a family of nine boys, all footballers, and originally from Roubaix Jules Dubly (1886–1953), French international footballer from Tourcoing, with no family connection to the three previous ones, often confused with Jean Dubly in sources Henry-Louis Dubly (1901–1985), French novelist

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