| Ilsbach | |
| Mouth Location: | Seenbach |
| Mouth Coordinates: | 50.6131°N 9.0292°W |
| Progression: | Seenbach→ |
| Subdivision Type1: | Country |
| Length: | 20.7km (12.9miles) |
The Ilsbach (in its upper course: Streitbach, in its middle course: Sausel) is a river of Hesse, Germany. It is a 20.7 km long, right-bank tributary of the Seenbach and flows into it in Mücke.