Titus Flavius T. f. T. n. Sabinus (d. December 20, AD 69) was a Roman politician and soldier. A native of Reate, he was the elder son of Titus Flavius Sabinus and Vespasia Polla, and brother of the Emperor Vespasian.
Sabinus is first mentioned in the reign of Claudius, in AD 45, when he served as a legate under Aulus Plautius in Britain, along with his brother, Vespasian. He afterwards governed Moesia for seven years. Sabinus was consul suffectus with Gnaeus Hosidius Geta in AD 47, and was praefectus urbi for the last eleven years of Nero's reign. Upon the ascension of Galba in the year 68, he was replaced as urban prefect by Aulus Ducenius Geminus. However, with the death of Galba, and ascension of Otho in January of 69, Sabinus was reinstated. Sabinus may have been part of the Pisonian conspiracy against Nero, but if so he was never arrested.
Sabinus was an important supporter of his brother; when Vespasian found himself in financial difficulties while governor of Africa, Sabinus lent him the money to continue, and while Vespasian was governor of Judaea Sabinus was a vital source of information on events in Rome. After the death of Otho, Sabinus directed the urban cohorts to swear allegiance to Vitellius, evidently an attempt to preclude further bloodshed. At the same time, the consul Titus Flavius Sabinus, probably Sabinus' nephew, directed his troops in northern Italy to submit to the generals of Vitellius. Sabinus continued to retain the dignity of praefectus urbi under Vitellius.