Grünau (German pronunciation: [ɡʁyːˈnaʊ̯] ) is a German locality (Ortsteil) within the Berlin borough (Bezirk) of Treptow-Köpenick. Until 2001 it was part of the former borough of Köpenick.

During 1747 and 1753 some settlements were founded by Frederick II of Prussia, as Müggelheim, Friedrichshagen and Grünau itself. The village, founded in 1749, was first mentioned in 1754 with the name of Grüne Aue. Until 1920 it was a Prussian municipality of the former district of Teltow, merged into Berlin with the "Greater Berlin Act".

For the 1936 Summer Olympics, the city hosted the canoeing and rowing events at the regatta course on the Langer See.

Located in the south-eastern suburb of Berlin, Grünau is bounded (in south-west) by the Brandenburger town of Schönefeld (in Dahme-Spreewald district). The Berliner bordering localities are Bohnsdorf, Altglienicke, Adlershof, Köpenick, Müggelheim and Schmöckwitz.

The quarter is surrounded by the Berliner Stadtforst and traversed by the river Dahme (tributary of the Spree) in the southern shore. In the lake Langer See, formed on the river, the islet of Großer Rohrwall belongs to Grünau.

Grünau is divided into 3 zones (Ortslagen):

• An der Regattastrecke
• Grünau-Ost
• Grünau-West

As urban rail, the locality is served by the S-Bahn lines S46, S8 and S85 (at the homonymous railway station); and by the tramway line 68. To cross the river Dahme, it is served by the BVG ferry line F12 in Wassersportallee, that links Grünau to Köpenick.

• Karl Dönitz (1891–1980), admiral and politician, last president of Nazi Germany
• Stefan Heym (1913–2001), writer. He lived several years in a villa in Grünau.
• Walter Benjamin (1892-1940), writer and philosopher. He lived in a villa designed by Bruno Taut.

• 
  The former "Funkhaus Grünau"
• 
  Protected landscape "Krumme Lake in Grünau
• 
  Kapp Putsch memorial

Media related to Grünau at Wikimedia Commons

• 1936 Summer Olympics official report. Volume 2. pp. 996–1029.
• (in German) Grünau page on www.berlin.de