Región Autónoma del Atlántico Norte (Spaingie for "Autonomous Region o the Northren Atlantic"), sometimes shortened tae RAAN, is ane o twa autonomous regions in Nicaragua. It covers an aurie o 32,159 km² an haes a population o 249,700 (2005 census). It is the lairgest autonomous region or depairtment in Nicaragua. The caipital is Puerto Cabezas.