Troisvierges (Luxembourgish: Ëlwen, German: Ulflingen) is a commune and town in northern Luxembourg, in the canton of Clervaux. The two highest hills in Luxembourg, the Kneiff (560 m) and Buurgplaatz (559 m), are located in the commune.As of 2005, the town of Troisvierges, which lies in the south of the commune, has a population of 1,365.