The village's more recent name of Mountnugent comes from a local branch of the Nugent family, originally an Anglo-Norman family who were cousins of
Hugh de Lacy and large landowners in Meath, Cavan and Westmeath. Although the village is in County Cavan, the Roman Catholic parish of Mountnugent (or Kilbride) is in the
Diocese of Meath. In the Church of Ireland, Mountnugent, or Kilbride Castlecor, is part of the parish of
Castlepollard in the
diocese of Meath and Kildare. The village is in the
Dáil constituency of
Cavan–Monaghan and in the electoral division of Kilbride. For planning applications or land registration purposes, it is in the
barony of Clanmahon. While the river that the village is located on, with its mid-18th century bridge, is sometimes referred to as the
Inny, most sources name a river 3 kilometres to the southwest forming the boundary of Meath and Cavan near Ross Castle as the
River Inny, rising near
Oldcastle, and the river that flows through the village as the Mountnugent Stream, rising near
Ballyjamesduff. During the launch of Ireland's new postcode system,
Eircode, residents were surprised that Mountnugent was counted as part of County Meath, and that the Irish name was now a literal translation of the English name - "
Sliabh an Nuinseannaigh". ==Facilities==