Castleblayney
（重定向自Castleblaney）
![](/Images/godic/202501/03/Castleblayney_-_geograph.org.uk_-_3096223930.jpg")
![](/Images/godic/202501/03/Ireland_location_map.svg3930.png")
Castleblayney (/ˌkæ.səl.ˈbleɪ.niː/; Irish:Baile na Lorgan, formerly Caisleán Mathghamhna, also spelled Castleblaney) is a town in County Monaghan, Ireland. The town has a population of 3,634 according to the 2011 census. Castleblayney is near the border with County Armagh in Northern Ireland, and lies on the N2 road from Dublin to Derry. The modern Irish name for the town, Baile na Lorgan, means 'Town of the Long Low Ridge'.