Adenau [ˈaːdənaʊ] is a municipality in the district of Ahrweiler, in Rhineland-Palatinate, Germany. It is situated in the Eifel mountains, approx. 25 km south-west of Bad Neuenahr-Ahrweiler. The town is famous because is located at one side of the Nordschleife of the Nürburgring. Adenau is the seat of the Verbandsgemeinde ("collective municipality") Adenau.