The commune of Mompach, population 960, is located in the eastern corner of the Grand Duchy of Luxembourg, on the
Sure River and the border with Germany.
Born, Boursdorf, Givenich, Herborn, Moersdorf, and Mompach (population 97) are boroughs within the commune of Mompach.
The N10 roadway, which follows the course of the Sure, passes through Moersdorf.