Glack ({Irish derived place name|Glaic|hollow}) is a hamlet and townland in County Londonderry, Northern Ireland. It is 4 km south of Ballykelly, in a raised spot overlooking Lough Foyle. . In the 2001 Census it had a population of 183 people. Glack is within the Limavady Borough Council area. Glack is made up of three clusters of buildings. It ha...