Edoardo Sonzogno (April 21, 1836 – March 14, 1920) was an Italian publisher. A native of Milan, Sonzogno was the son of a businessman who owned a printing plant and bookstore. When he inherited the business upon his father's death he set about turning it into a publishing house, , which opened in 1874. The company specialized in producing cheap editions of early Italian music, and became celebrated for its one-act opera contest, which began in 1883. Among the participants was Giacomo Puccini with Le Villi (1883) - who, in fact, did not win so that the opera was taken over by Giulio Ricordi, the competitor of Sonzogno. Pietro Mascagni's Cavalleria rusticana, submitted in 1889 and premiering in 1890, was by far the most famous opera to win the prize.