| Waldach | |
| Mouth Coordinates: | 48.5513°N 8.7214°W |
| Subdivision Type1: | Country |
| Subdivision Type2: | State |
| Length: | 24.5km (15.2miles) |
The Waldach is a river of Baden-Württemberg, southwestern Germany. The 24.5 kilometer long Waldach is a right tributary of the river Nagold in the town Nagold.