| Hahnbach | |
| Mouth Coordinates: | 48.9878°N 9.9126°W |
| Progression: | Klingenbach→ |
| Subdivision Type1: | Country |
| Tributaries Right: | Rotklingenbach |
The Hahnbach (also: Hambach) is a river of Baden-Württemberg, Germany. It is a right tributary of the Klingenbach near Bühlerzell.