Rosenau ( or ; ) is a commune in the Haut-Rhin department in Alsace in north-eastern France.
Nearby cities and towns of the commune are Saint-Louis, Bartenheim, Blotzheim and Buschwiller
in 1932 the first hydroelectric power station between the boundaries of Rosenau and Kemps was commissioned by President Lebrun
On 19 November 1944, French Lieutenant Jean de Loisy's tank detachment arrived at the Rhine in Rosenau was the first army to arrive at the Rhine at Rosenau.