Traunreut (German pronunciation: [tʁaʊ̯nˈʁɔɪ̯t] ⓘ; Central Bavarian: Traunreit) is a town in southeastern Bavaria, Germany in the Traunstein district.

Companies present in the area include Siteco Beleuchtungstechnik GmbH (lighting fixtures), Dr. Johannes Heidenhain GmbH (linear and rotary encoders, gaging systems, CNC controls), Bosch and Siemens Household Appliances, BSH (household equipment, high-tech stoves and microwaves), and other midsize firms.

After World War II, with the factory closed, ethnic German expellees from their settlements in Central and Eastern Europe settled in the abandoned grounds, and toxic material was removed from the area.

In 1960, Traunreut became a town, and in 1978, after the German local government reform, the then independent neighboring villages of Traunwalchen, Stein - Sankt Georgen and Pierling came under the administration of Traunreut.

In 2008 Traunreut is the largest town in the Traunstein district.