Rathvilly is a village, civil parish and townland in County Carlow, Ireland. The village is on the River Slaney, near the border with County Wicklow and County Kildare, 11 km (7 mi) from Tullow and 8 km (5 mi) from Baltinglass. It is also on the N81 national secondary route. Rathvilly won the Irish Tidy Towns Competition in 1961, 1963, and 1968.

Lisnavagh Estate is an estate house which lies outside the village of Rathvilly in County Carlow, Ireland. Lisnavagh is the family seat of the McClintock-Bunbury family, Barons Rathdonnell. A plaque in the present house states that the original house at Lisnavagh was built by William Bunbury in 1696. A map from the 1840 Ordnance Survey shows this in the parklands below the current house, with some modest farm buildings close by. The 1840 map also shows "Foundations of House" to the northwest, near the top of the hill, which is where a new house was planned but never completed. The new house was ultimately built nearer to the old house.