| Bannwaldsee | |
| Location: | Allgäu, Bavaria |
| Coords: | 47.6011°N 10.7772°W |
| Inflow: | Buchinger Ache |
| Outflow: | Mühlberger Ach |
| Catchment: | 21.42km2 |
| Basin Countries: | Germany |
| Length: | 2.34km (01.45miles) |
| Width: | 1.445km (00.898miles) |
| Pushpin Map: | Bavaria#Germany |
| Area: | 2.28km2 |
| Depth: | 6.2m (20.3feet) |
| Max-Depth: | 12m (39feet) |
| Volume: | 14090000m2 |
| Residence Time: | 5.2 years |
| Shore: | 6.79km (04.22miles) |
| Elevation: | 785.9m (2,578.4feet) |
Bannwaldsee is a lake near Schwangau, Bavaria, Germany. At an elevation of 785.9 m, its surface area is 2.28 km2.