Back Altenau CEB Altenau Danish Altenau (Begriffsklärung) German Алтенау (појаснување) Macedonian Altenau Polish Альтенау (значения) Russian Altenau Swedish
Altenau is a town in Lower Saxony.
Altenau may also refer to:
- Altenau (Oker), a tributary of the Oker in eastern Lower Saxony
- Altenau (Alme), a tributary of the Alme in eastern North Rhine-Westphalia
- Altenau, a part of Mühlberg, Brandenburg, Germany