| Irserbach | |
| Mouth Location: | Sieg |
| Mouth Coordinates: | 50.7812°N 7.6274°W |
| Subdivision Type1: | Country |
| Subdivision Type2: | States |
| Length: | 12.4km (07.7miles) |
Irserbach (also: Irsenbach, Scharfenbach) is a river of Rhineland-Palatinate and North Rhine-Westphalia, Germany. It flows into the Sieg near Windeck.