Leun is a small town in the Lahn-Dill-Kreis in Hesse, Germany. Leun lies some 10 km west of Wetzlar between the foothills of the northern Ta…Leun is a small town in the Lahn-Dill-Kreis in Hesse, Germany. Leun lies some 10 km west of Wetzlar between the foothills of the northern Taunus and the Westerwald in the Lahn valley, at a height of 150 to 330 m above sea level.