Lasauvage (Luxembourgish: Zowaasch) (German: — notionally only — Rohrbach) is a small town in the commune of Differdange, in south-western Luxembourg.
Lasauvage was known as one of the few French-speaking towns[citation needed] in an otherwise Luxembourgish-speaking country. Unlike many German alternatives to place names in Luxembourg, Lasauvage's German equivalent, Rohrbach, has been little-used because of its perceived Nazi associations.
Shortly before the Second World War, there were plans drawn up by the Luxembourg government for Grand Duchess Charlotte to reside in Lasauvage, given its proximity to France, which would enable her to escape over the border easily, but they did not come to fruition.