Reichenau may refer to:
- Reichenau Island, a German island in Lake Constance, site of a Benedictine abbey
- Reichenau, Baden-Württemberg, a municipality on this island
- Reichenau, Switzerland, part of the municipality Tamins, in Grisons, Switzerland
- Reichenau, Carinthia, a municipality in Carinthia, Austria
- Reichenau an der Rax, a municipality in Lower Austria, Austria
- Reichenau im Mühlkreis, a municipality in Upper Austria, Austria
- The Polish town of Bogatynia, which until 1945 was the German town of Reichenau
- The Czech town of Rychnov nad Kněžnou, historically named Reichenau an der Knieschna in German
- The Gottschee village of Rajhenav, known as Reichenau in German
Read more about Reichenau: Family Name