Tegernsee lies on the east shore of the eponymous lake, neighbouring Gmund am Tegernsee and Hausham to the north, Schliersee to the east and Rottach-Egern to the south. It is located within the Miesbach district in the Bavarian Alps. The Bavarian state capital, Munich, is about 50 km (31 mi) north of the town, and the Austrian state of Tyrol is about 20 km (12 mi) south.
The Alpbach stream, whose bed it was planned to clean up in 2010, runs through the center of Tegernsee. The Rottach river flows partly along the communal limit between Tegernsee and Rottach-Egern. The Baumgartenschneid, a 1,448-metre-high mountain, is located not far from the town.
As of the 2010 census, Tegernsee had a population of 3,889, of whom 1,672 were male and 2,217 female
