Newtownmountkennedy is a small town in County Wicklow, Ireland. It developed within the historic townland of Ballygarny, although all that remains is a motte where a church, graveyard and a castle or tower house once stood just 0.85 km north of the town. It acquired its present name in the mid-seventeenth-century, when Sir Robert Kennedy, M.P. for Kildare, made it his principal residence. It is just off the N11 road to Wexford, just south of Kilpedder and south-west of Greystones.