Langsur is a municipality in the Trier-Saarburg district, in Rhineland-Palatinate, Germany.

Mesenich is a small German village belonging to the Ortsgemeinde of Langsur.

It is located on the north of the verbandsgemeinde, near the Sauertalbrücke, the bridge in which the Bundesautobahn 64, the motorway connecting Luxembourg City and Trier, crosses the Sauer.

Wasserbilligerbrück is another small German village belonging to the Ortsgemeinde of Langsur.

[3] It is located on the bridge across the Sauer connecting it to the Luxembourgish town of Wasserbillig.