Helperknapp is a commune in central Luxembourg, in the canton of Mersch.

It was established on 1 January 2018 from the amalgamation of the communes of Boevange-sur-Attert and Tuntange.

In two referendums held simultaneously in Boevange-sur-Attert and Tuntange on 25 May 2014, the citizens of both communes approved a municipal merger, with 69.51% and 64.09%, respectively, in favour.

Based on the poll, legislators of the two communes voted in favor of the merger.

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