Mompach (Luxembourgish: Mompech) is a village in the commune of Rosport-Mompach in eastern Luxembourg.

It is part of the canton of Echternach, which is part of the district of Grevenmacher.

On 1 January 2018, the commune was merged with Rosport to form the new commune of Rosport-Mompach.

The former commune consisted of the villages:

This article related to the geography of Echternach canton is a stub.