Gian Vincenzo de' Giuli (died 19 January 1672) was a Roman Catholic prelate who served as Bishop of Massa Lubrense (1645âÂÂ1672).
On 15 May 1645, Gian Vincenzo de' Giuli was appointed by Pope Innocent X as Bishop of Massa Lubrense. On 21 May 1645, he was consecrated bishop by Giulio Cesare Sacchetti, Cardinal-Priest of Santa Susanna, with Alessandro Castracani, Bishop of Fano, and Papirio Silvestri, Bishop of Macerata e Tolentino, serving as co-consecrators. He served as Bishop of Massa Lubrense until his death on 19 January 1672.