| Rahlau | |
|---|---|
|  | |
| Location | |
| Country | Germany | 
| States | Hamburg | 
| Physical characteristics | |
| Mouth | |
|  • location | Wandse | 
|  • coordinates | 53°34′53″N 10°05′59″E / 53.5814°N 10.0996°E / 53.5814; 10.0996 | 
| Basin features | |
| Progression | Wandse→ Alster→ Elbe→ North Sea | 
Rahlau is a river of Hamburg, Germany. It flows into the Wandse in Wandsbek.