Rottach-Egern (German pronunciation: [ˈʁɔtax ˈeːɡɐn]) is a municipality (Gemeinde Rottach-Egern am Tegernsee) and town located at Lake Tegernsee in the district of Miesbach in Upper Bavaria, Germany, about 55 km (35 miles) south of central Munich.

The villages of Rottach, Egern, Gasse, Schorn, Sonnenmoos, Staudach, Weißach and Wolfsgrub have merged to become parts of a single settlement near the lake.

More hamlets in the municipality are Berg, Ellmau, Hagrain, Haslau, Kalkofen, Oberach, Sutten and Trinis, Brandstatt, Enterrottach, Erlach, Kühzagl and Unterwallberg.

The principal mountain range is part of the Mangfallgebirge, of which the Wallberg, at 1,722 metres (5,650 ft), with a cable car, is a venue for skiing, paragliding and the Wallenberg toboggan run.

The Catholic parish church of St. Lawrence is located in the district of Egern.