Laudachsee
View from Katzenstein down to the Laudachsee.
Laudachsee
Location	Salzkammergut, Upper Austria
Coordinates	47°52′44″N 13°51′10″E / 47.878889°N 13.852778°E / 47.878889; 13.852778
Primary outflows	Laudach
Basin countries	Austria
Max. length	400 m (1,300 ft)
Max. width	400 m (1,300 ft)
Surface area	0.1 km2 (0.039 sq mi)
Average depth	15–26 m (49–85 ft)
Max. depth	26 m (85 ft)
Surface elevation	894 m (2,933 ft)

Laudachsee is a lake between the mountains in the Upper Austrian part of the Salzkammergut and neighbour to the larger Traunsee. Beside are the mountains Traunstein and Grünberg.

In the summer the lake reaches about + 20 °C. It drains through Laudach, Alm, Traun into the Danube.