The commune of Lac Haute-Sre, population 1,326, is located in northwest Luxembourg, on the border with Belgium. It is named for a Lake formed by the damming of the
Sure river.
Bavigne, Harlange, Kaundorf, Liefrange, Mecher, Nothum, Tarchamps, and Watrange are boroughs within the commune of Lac Haute-Sre.
The N15 roadway traces the northeast edge of Lac Haute-Sre.