| Laudenauer Bach | |
| Mouth Location: | Mergbach |
| Mouth Coordinates: | 49.6996°N 8.8195°W |
| Subdivision Type1: | Country |
| Length: | 3.7km (02.3miles) |
| Tributaries Right: | Bach von dem Kohl, Bach an der Kniewiese |
Laudenauer Bach is a small river of Hesse, Germany. It flows into the Mergbach near Reichelsheim.