Gaeltacht na nDéise is a Gaeltacht area in County Waterford consisting of the parish of An Rinn and An Sean Phobal. Gaeltacht na nDéise is located 10 km from the town of Dungarvan. Gaeltacht na nDéise has a population of 1,784 people (Census 2011) and encompasses a geographical area of 62 sq km. This represents 1% of total Gaeltacht area.