Saint Romanus of Subiaco (died c. 550 AD) was a hermit in the area around Subiaco, Italy.
He is remembered as having assisted and influenced Saint Benedict of Nursia, when the latter had just begun his life as a hermit. Romanus provided Benedict with clothing (a religious habit), food, and housing (in the form of a cave above the river Anio, which Benedict lived in for 3 years.
Romanus is said to have gone to Gaul, where he founded a small monastery at Dryes-Fontrouge (Druyes-les-Belles-Fontaines) near Auxerre. He died there about 550 and was venerated as a saint. He is sometimes identified with the Romanus of Auxerre who was venerated as Bishop of Auxerre on 8 or 6 October. He was buried at the monastery at Dryes-Fontrouge, and his relics are now located at Auxerre, Sens, and Vareilles.