Rheinau is located in theUpper Rhine River Plains directly on the Rhine and as such at the German-French border. The center of town is located immediately on the Rhine crossing to France and the southern borough of Linx is located not far fromKehl andStrasbourg.
Rheinau is made up of the boroughs of Freistett (Hauptort and administrative seat of Rheinau with city hall), Diersheim, Hausgereut, Helmlingen, Holzhausen, Honau, Linx, Memprechtshofen and Rheinbischofsheim.
The town of Rheinau was created during the Baden-Württemberg district reform in January 1975 through the combination of the formerly independent municipalities of Freistett, Rheinbischofsheim and Honau.[3]