Roman emperor Titus Fulvius Iunius Quietus (d. 261) was the son of Fulvius Macrianus and a noblewoman. He gained imperial office when he and his brother Macrianus Minor were elevated to the throne by their father and by Ballista, praefect of the emperor Valerian.

Quietus and Ballista stayed in the east, while his brother and father marched their army to Europe to seize control of the Roman empire. After the defeat of his brother and father in Thrace in 261, he fled to the city of Emesa, where he was killed by Odaenathus of Palmyra.