Atilio José Demaría (; 19 March 1909 – 11 November 1990), Italianized as Attilio Demaria (), was an Italian Argentine footballer, who played as a striker. He played club football in Argentina and Italy. At international level, he represented Argentina in the 1930 World Cup and Italy in the 1934 World Cup, reaching the finals of both tournaments and winning the latter edition of the competition.