Giacomo Manzù, pseudonym of Giacomo Manzoni (22 December 1908 – 17 January 1991), was an Italian sculptor.
Manzù was born at Bergamo, the son of a shoemaker. Other than a few evening art classes, he was self-taught in sculpture, although he later became a professor himself. He started working wood during his military service in the Veneto in 1928; later, after a short sojourn in Paris, he moved to Milan, where architect Giovanni Muzio commissioned him the decoration of the chapel of Università Cattolica del Sacro Cuore (1931–1932). In 1933 he exhibited a series of busts at the Triennale di Milano, which granted him national popularity. The following year he held in Rome a personal exhibition with the painter Aligi Sassu, with whom he shared a studio.
In 1939 Manzù started a series of bronze bas-reliefs about the death of Jesus Christ; the works, exhibited in Rome in 1942, were criticized by the Fascist government and the ecclesiastical authorities. In 1940 he obtained a teaching position in the Accademia di Brera in Milan, but later he moved to the Accademia Albertina in Turin. During World War II Manzù moved to Clusone, returning to teach at Brera after the end of the conflict, a position he held until 1954. Until 1960 he lived in Salzburg. Here he met Inge Schabel, his future wife, who was the model of numerous portraits together with her sister Sonja. In 1964 he completed the "Death Gate" for the St. Peter's Basilica in Rome. In the same year he moved to Ardea, near Rome, in a locality now rechristened Colle Manzù in his honor.