Offenau (disambiguation)
Offenau is a German place and water body name:
- Offenau , municipality in the district of Heilbronn, Baden-Württemberg, Germany
- Offenau (Bokholt-Hanredder) , district of the community Bokholt-Hanredder , Pinneberg district, Schleswig-Holstein, Germany
- Offenau (East Prussia) , village in the Johannisburg district, East Prussia, until 1938 Salleschen , since 1945: Zalesie (Biała Piska) in the Powiat Piski, Warmian-Masurian Voivodeship, Poland
- Offenau (Krückau) , backwaters of the Krückau, Pinneberg district, Schleswig-Holstein