Henri Delacroix (2 December 1873 – 3 December 1937, Paris) was a French psychologist, "one of the most famous and most prolific French psychologists working at the beginning of [the twentieth] century."
Born in Paris, Henri Delacroix was educated at the Lycée Henri-IV and the Sorbonne, gaining his agrégation in philosophy in 1894. After two years at the University of Berlin and the University of Heidelberg, he became a professor at the Lycée de Pau, He later became a professor and subsequently dean of the Faculty of Letters at the Sorbonne. He died in Paris.