| Irrbach | |
| Mouth Location: | Osterbach |
| Mouth Coordinates: | 49.6941°N 8.8598°W |
| Subdivision Type1: | Country |
| Subdivision Type2: | States |
| Tributaries Right: | Lauchbach |
The Irrbach is a small river of Hesse, Germany. It is a two-kilometer-long left tributary of the Osterbach, flowing into it in Unter-Ostern.