| Type: | Bishop |
| Honorific-Prefix: | Most Reverend |
| Marco Giustiniani | |
| Bishop of Torcello | |
| Church: | Catholic Church |
| Diocese: | Diocese of Torcello |
| Term: | 1692–1735 |
| Predecessor: | Giacomo Vianoli |
| Successor: | Vincenzo Maria Diedo |
| Consecration: | 30 March 1692 |
| Birth Date: | 12 February 1655 |
| Birth Place: | Venice, Italy |
| Death Date: | 2 March 1735 (age 80) |
| Death Place: | Torcello, Italy |
| Nationality: | Italian |
Marco Giustiniani (1655–1735) was a Roman Catholic prelate who served as Bishop of Torcello (1692–1735).[1]
Marco Giustiniani was born in Venice, Italy on 12 February 1655. He was ordained a deacon on 20 January 1692 and a priest on 27 January 1692. On 24 March 1692, he was appointed during the papacy of Pope Innocent XII as Bishop of Torcello. On 30 March 1692, he was consecrated bishop. He served as Bishop of Torcello until his death on 2 March 1735. While bishop, he was the principal co-consecrator of Francesco Andrea Grassi, Bishop of Caorle (1700) and Pietro Barbarigo, Patriarch of Venice (1706).