| Honorific-Prefix: | Most Reverend |
| Gian Vincenzo de' Giuli | |
| Bishop of Massa Lubrense | |
| Church: | Catholic Church |
| Diocese: | Diocese of Massa Lubrense |
| Term: | 1645–1672 |
| Predecessor: | Alessandro Gallo |
| Successor: | Francesco Maria Neri |
| Consecration: | 21 May 1645 |
| Consecrated By: | Giulio Cesare Sacchetti |
| Death Date: | 19 January 1672 |
| Death Place: | Massa Lubrense, Naples |
Gian Vincenzo de' Giuli (died 19 January 1672) was a Roman Catholic prelate who served as Bishop of Massa Lubrense (1645–1672).[1]
On 15 May 1645, Gian Vincenzo de' Giuli was appointed by Pope Innocent X as Bishop of Massa Lubrense.[2] 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.