Marcantonio Giustinian (March 2, 1619 - March 23, 1688) is the 107th Doge of Venice, reigning from his election on January 26, 1684 until his death.
Giustiniani is the quintessential Doge of the Republic of Venice, taking little interest in affairs of state.
He has little role in the conduct of the Morean War (1684-1699), which is raging during his time as Doge, though a number of military victories are secured by provveditore Francesco Morosini, who will later be Giustinian's successor as Doge.