| Bettenauer Weiher | |
|---|---|
| Location | Oberuzwil, Canton of St. Gallen |
| Lake type | reservoir |
| Primary inflows | Mülelibach |
| Basin countries | Switzerland |
| Max. length | 400 m |
| Max. width | 100 m |
| Surface area | 0.01 km² |
| Max. depth | 2 m |
| Surface elevation | 587 m |
Bettenauer Weiher (or Bettenauerweier) is a lake between Jonschwil and Oberuzwil in the Canton of St. Gallen, Switzerland. The lake formed in the 15th century when a dam was built for a fish pond.