| Grossbach | |
| Subdivision Type1: | Country |
| Subdivision Name1: | Germany |
| Subdivision Type2: | State |
| Subdivision Name2: | Rhineland-Palatinate |
| Subdivision Type3: | Reference no. |
| Subdivision Name3: | DE: 26564 |
| Length: | 7.67 km |
| Source1 Location: | Source region: Near Greimerath |
| Source1 Elevation: | ca. |
| Mouth Location: | Near Niederzerf into the Ruwer |
| Mouth Elevation: | ca. |
| Basin Size: | 27.77 km² |
| Custom Label: | References |
The Großbach is a river in the district of Trier-Saarburg in the German state of Rhineland-Palatinate. It has a length of 7.67 kilometres and a catchment area of 27.77 km².
Its right-hand tributaries are the Eselsbach near Greimerath with a length of 6.69 km and a catchment of 8.63 km², the Bingelbach between Greimerath and Zerf with a length of about 1.7 km and the Ellerborn near Oberzerf with a length of 1.54 km and catchment of 1.53 km².
The Großbach discharges into the Ruwer at Niederzerf.