| Rapolţel River | |
| Láz-patak | |
| River | |
| Countries | Romania |
|---|---|
| Region | Transylvania |
| Counties | Hunedoara County |
| Tributaries | |
| - left | Rapolţel River |
| Villages | Rapolţel, Rapoltu Mare |
| Mouth | Mureş |
| - location | Rapoltu Mare |
The Lazu River (Hungarian: Láz-patak ) is a tributary of the Mureş River in Transylvania, Romania. Its name originates from the Hungarian, means “Fever Creek”.