Rusticus of Narbonne was a 5th-century bishop and monk who served the Catholic Church in Gaul. Born around 301, he was trained in Rome as an orator before choosing a contemplative life at Lérins Abbey. He was consecrated as the Bishop of Narbonne in the late 420s or early 430s. Throughout his tenure, he participated in several significant ecclesiastical gatherings, including the First Council of Ephesus, where he worked to address theological disputes and the spread of Arianism.