| Lerbach | |
| Image Alt: | Lerbach River |
| Mouth Coordinates: | 51.7295°N 10.2524°W |
| Subdivision Type1: | Country |
| Subdivision Type2: | State |
| Length: | 7970m (26,150feet) |
| Source1 Elevation: | 596m (1,955feet) |
| Mouth Elevation: | 220m (720feet) |
Lerbach is a small river of Lower Saxony, Germany. It flows into the Söse in Osterode am Harz.