| Colmnitzbach | |
| Mouth Coordinates: | 50.9325°N 13.4367°W |
| Progression: | Bobritzsch→ |
| Subdivision Type1: | Country |
| Subdivision Name1: | Germany |
| Subdivision Type2: | State |
| Subdivision Name2: | Saxony |
The Colmnitzbach is a river of Saxony, Germany. It is a right tributary of the Bobritzsch, which it joins in (a district of Bobritzsch).