Coill Dubh (Irish pronunciation: [kəilʲ d̪ˠʊw] or [kəilʲ d̪ˠʊv]) is a town in Ireland in northern County Kildare, at the junction of the R403 and R408 regional roads, about 40 km (25 mi) from Dublin. Its population of 684 (2006 Census) represents an increase of 15.5pc on the 2002 census.