Lucius Arruntius (ca. 60 BC – AD 10) was a Roman admiral. He saw action during the War with Sextus Pompeius, and the war of Mark Antony and Augustus. He is most notable for his participation during the Battle of Actium, where he was in command of victorious Augustus' central division. He was also instrumental in convincing Octavian to pardon Gaius Sosius, one of Mark Antony's generals, after his capture. An adopted grandson, Lucius Arruntius Camillus Scribonianus (cos. AD 32), rebelled against Claudius in a brief civil war, but committed suicide when the rebellion failed in AD 42.