Joseph Csaky (also written Josef Csàky, Csáky József, József Csáky and Joseph Alexandre Czaky) (18 March 1888 – 1 May 1971) was a Hungarian avant-garde artist, sculptor, and graphic artist, best known for his early participation in the Cubist movement as a sculptor. Csaky was one of the first sculptors in Paris to apply the principles of pictorial Cubism to his art. A pioneer of modern sculpture, Csaky is among the most important sculptors of the early 20th century. He was an active member of the Section d'Or group between 1911 and 1914, and closely associated with Crystal Cubism, Purism, De Stijl, Abstract art, and Art Deco throughout the 1920s and 1930s.