Fischbachau is a municipality in the district of Miesbach in Bavaria in Germany.

Fischbachau is located in the valley of the river Leitzach, on an Alluvial fan at the east edge of the Leitzachtals and at the foot of Breitenstein mountain.

Fischbachau is mentioned for the first time in the Frisian Liber commutationum et traditionum around 1078-1080.

In 1811 Fischbachau was turned into a formal municipality with a mayor.

During World War II, a subcamp of the Dachau concentration camp was located here.