Staatstheater am Gärtnerplatz, Opera house and theatre at Gärtnerplatz, Munich, Germany

Staatstheater am Gärtnerplatz is an opera house and theatre in central Munich with a three-story limestone facade adorned with detailed ornamentation throughout. The building holds roughly 1,100 seats and serves as a venue for operas, operettas, and musical productions.

A committee formed in 1863 to create a people's theatre, and Ludwig II authorised the building on 10 May 1864. Franz Michael Reiffenstuel designed it after the Nationaltheater; the foundation stone was laid on 25 August 1864 and it opened on 4 November 1865. After bankruptcy in 1868 and a forced auction in 1870, Ludwig II bought it and granted the title Royal Theatre at the Gärtnerplatz in 1873.

The house has been a state operetta stage since 1937, the only one in Germany. Its name comes from the neighbouring Gärtnerplatz square in the Isarvorstadt district. Operettas by Carl Zeller and Johann Strauss were premiered or revived here, and the season still runs from September to July with more than 200 performances.

The theatre stands on Gärtnerplatz in the Isarvorstadt district, a short walk from the Reichenbachbrücke and the Isar. The season runs from September to July with more than 200 performances, so evening slots fill quickly. The house reopened in October 2017 after a full renovation, with a reorganised foyer and auditorium.

The house reopened in October 2017 after a full renovation; the sources give no start year for that work. Its only state operetta stage status dates from the 1937 restoration, when Die Fledermaus reopened it on 20 November with Adolf Hitler among the audience.