Tullaghan (Irish: An Tulachán) is the most northernly village in County Leitrim, It is in the parish of Kinlough and Glenade and is located in the Manorhamilton electoral area. Ireland. Due to extensive property development, fueled by tax breaks, it has now mushroomed in size. The village had a population of 520 in 2002 and had grown to 764 by 2006.