Decius Oranius Pertacus (110 BC-) was a Roman citizen who lived in Narbo Martius, Gallia Narbonensis (present-day Narbonne, France) during the 1st century BC. In 57 BC, he was called to arms to defend Narbo Martius from the Gauls, fighting against the invading Volcae at the Battle of Narbo Martius.