Giacinto is a masculine Italian given name. Notable people with the name include:

• Giacinto Achilli (1803–1860), Italian Roman Catholic discharged from the priesthood for sexual misconduct
• Giacinto Allegrini (born 1989), Italian professional football player
• Giulio Giacinto Avellino (1645–1700), Italian painter of the Baroque period
• Giacinto Bellini (17th century) was an Italian painter active in the Baroque period
• Giacinto Bobone (c. 1106 – 1198), later Pope Celestine III
• Giacinto Bosco (1905–1997), Italian jurist, academic and politician
• Giacinto Brandi (1621–1691), Italian painter of the Baroque era
• Giacinto Calandrucci (1646–1707), Italian painter of the Baroque period
• Giacinto Cestoni (1637–1718), Italian naturalist
• Giacinto Andrea Cicognini (1606–1651), Italian playwright and librettist
• Giacinto Collegno (1793–1856), Italian patriot of the Risorgimento period
• Giacinto De Cassan, former Italian cross-country skier
• Giacinto de Popoli (died 1682), Italian painter of the Baroque period
• Giacinto Facchetti (1942–2006), Italian football player
• Giacinto Garofalini (1661–1723), Italian painter of the Baroque period
• Giacinto Geronimo de Espinosa (1600–1680), Spanish painter of the Baroque period
• Giacinto Ghia (1887–1944), Italian automobile coachbuilder, founder of Carrozzeria Ghia
• Giacinto Gigante (1806–1876), Italian painter
• Giacinto Gimignani (1606–1681), Italian painter during the Baroque period
• Giacinto Marras (1810–1883), singer and musical composer
• Giacinto Menotti Serrati (1874–1926), Italian communist politician
• Giacinto Morera (1856–1909), Italian mathematician
• Giacinto Prandelli (1914–2010), Italian operatic tenor
• Giacinto Santambrogio (1945–2012), Italian professional road bicycle racer
• Giacinto Scelsi (1905–1988), Italian composer who also wrote surrealist poetry in French
• Giacinto Scoles (born 1935), European and North American chemist and physicist
• Giacinto Sertorelli (1914–1938), Italian alpine skier
• Giacinto Placido Zurla (1769–1843), Italian clergyman, Cardinal Vicar of Rome