| Gründau | |
| Map: | Gründau.png |
| Map Size: | 280px |
| Mouth Location: | Kinzig |
| Mouth Coordinates: | 50.1613°N 9.0214°W |
| Subdivision Type1: | Country |
| Length: | 30.3km (18.8miles) |
| Basin Size: | 95.7km2 |
Gründau (in its upper course: Litterbach) is a river of Hesse, Germany. It flows into the Kinzig near Langenselbold.