| Irrsee | |
| Location: | Salzkammergut |
| Outflow: | Zeller Ache |
| Basin Countries: | Austria |
| Length: | 4.4km (02.7miles) |
| Width: | 1km (01miles) |
| Area: | 3.5km2 |
| Max-Depth: | 32m (105feet) |
| Elevation: | 553m (1,814feet) |
| Cities: | Zell am Moos |
| Pushpin Map: | Austria |
| Pushpin Map Alt: | Location of the lake in Austria. |
Irrsee is a lake in the Salzkammergut, Austria, located at . Its surface is approximately 3.5km2 and its maximum depth is 32 metres. It is a popular tourist destination, also thanks to the warmest water temperature of all lakes in Salzkammergut. It is drained by the Zeller Ache towards the Mondsee.