| White Ernz | |
|---|---|
| Origin | Grünewald |
| Mouth | Sauer, at Reisdorf |
| Basin countries | Luxembourg |
| Length | 30 km |
The White Ernz (Luxembourgish: Wäiss Iernz, French: Ernz blanche, German: Weiße Ernz) is a river flowing through Luxembourg, joining the Sauer at Reisdorf. It flows through the towns of Larochette, Medernach and Ermsdorf.