| Merzbach | |
| Mouth Location: | Rur in Linnich |
| Mouth Coordinates: | 50.9887°N 6.2713°W |
| Subdivision Type1: | Country |
| Subdivision Type2: | State |
| Length: | 28.4km (17.6miles) |
The Merzbach is a small river located in North Rhine-Westphalia, western Germany.
The mouth of the Merzbach is at the town of Linnich, where it becomes a western tributary of the Rur/Roer. The Rur/Roer is a tributary of the Meuse (Dutch; Flemish: Maas).