New Ross (Irish: Ros Mhic Thriúin, formerly Ros Mhic Treoin) is a town in southwest County Wexford, Ireland. It is located on the River Barrow, near the border with County Kilkenny, and is around 20 km north east of Waterford. In 2011 it had a population of over 9,316 people, making it the third-largest town in the county after Wexford and Enniscorthy.