| Darmbach | |
| Mouth Location: | Schwarzbach |
| Mouth Coordinates: | 49.9226°N 8.3961°W |
| Subdivision Type1: | Country |
| Subdivision Name1: | Germany |
| Subdivision Type2: | State |
| Subdivision Name2: | Hesse |
| Length Km: | 29.1 |
The Darmbach (in its middle course: Landwehr, in its lower course: Landgraben) is a river of Hesse, Germany. It flows through Darmstadt, and into the Schwarzbach in Trebur.