| Klingnauer Stausee | |
|---|---|
| Location | Aargau |
| Lake type | reservoir |
| Primary inflows | Aar |
| Primary outflows | Aar |
| Basin countries | Switzerland |
| Max. length | 3 km |
| Max. width | 500 m |
| Surface area | 1.16 km² |
| Max. depth | 8.5 m |
| Residence time | 0.13 days |
| Surface elevation | 318 m |
| Islands | 1 |
| Settlements | Döttingen, Klingnau |
The Klingnauer Stausee (or "Klingnau reservoir") is a reservoir near Böttstein, canton of Aargau, Switzerland, at . The lake with a surface of 1.16 km² was formed at the construction of a power plant on the Aar river in the 1930s.