Untereisenbach (; or Eesbech) is a village in the commune of Parc Hosingen, in the Canton of Clervaux in northern Luxembourg. , the Eisenbach locality (comprising Untereisenbach and Obereisenbach) has a population of 311.
Untereisenbach lies in the Oesling region on the western bank of the Our, which forms the border between Luxembourg and Germany. The village sits at an elevation of approximately 252 metres. Directly across the river is the German village of ÃÂbereisenbach in Rhineland-Palatinate. The adjacent hamlet of Obereisenbach lies slightly to the north along the river bank; the three localities once formed a single settlement known as Eisenbach. A road bridge over the Our connects Untereisenbach with ÃÂbereisenbach.
The settlement of Eisenbach was first recorded around 450 AD during the Frankish period. By the 13th century the combined community of Unter-, Ober-, and ÃÂbereisenbach belonged to the County of Luxembourg. Following the Congress of Vienna (1814âÂÂ15) and a subsequent 1816 border treaty between the Netherlands and Prussia, the Our was established as the international boundary. ÃÂbereisenbach was assigned to Prussia, while Untereisenbach and Obereisenbach remained in the Grand Duchy of Luxembourg.
Untereisenbach was part of the commune of Hosingen until 1 January 2012, when Hosingen merged with Consthum and Hoscheid to form Parc Hosingen.
The village has a church dedicated to Saint Willibrord, the patron saint of Luxembourg.