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
Übereisenbach 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 Übereisenbach. ==History==