Dún Laoghaire-Rathdown County Council | 5,524 followers on LinkedIn. Dún Laoghaire-Rathdown County Council is a Local Authority serving a population of approximately 233,000 people. We are one of three local authorities that succeeded the former Dublin County Council on its abolition in 1994 and our responsibilities include housing, community, roads and transportation urban planning and development, amenities, culture and environment in Dún Laoghaire-Rathdown county. The vision for dlr is to embrace inclusiveness, champion quality of life through healthy placemaking, grow and attract a diverse innovative economy and deliver this in a manner that enhances our environment for future generations.