Rheinau (Low Alemannic: Rhinai) is a city in southwestern Baden-Württemberg, Germany and is part of the district of Ortenau.

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Rheinau is located in the Upper 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 from Kehl and Strasbourg.

Rheinau shares common borders with the following cities and towns, listed clockwise from the north: Lichtenau (district of Rastatt), Achern, Renchen, Appenweier and Kehl (all in the district of Ortenau) and the Alsatian towns of Gambsheim and La Wantzenau.

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.

• Boroughs of Rheinau
• 
  Freistett
• 
  Freistett
• 
  Helmlingen
• 
  Memprechtshofen
• 
  Memprechtshofen
• 
  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.

• SPD = 11 seats
• IG Handel = 4 seats
• CDU = 12 seats
• Total = 27 seats

• Lutheran Church Rheinbischhofsheim: 56 m high, largest church in the area, built in 1876, remodeled in 1998
• Heidenkirchl (in Freistett)
• St. Nikolaus Church

Rheinau is connected to Achern, Bühl and Kehl by bus lines and belongs to the Public Transportation Authority of the district of Ortenau.

• (in German) Official site of the city of Rheinau
• (in German) Information about and images
• (in German) Weberhaus
• (in German) Heimatmuseum Rheinau