Landestheater Niederbayern is a theatre company in Lower Bavaria, Germany, founded in 1952 and offering both musical theater and drama.
Shortly after the end of World War II, the theaters in Landshut, Passau, and Straubing had begun operating independently.
In February 1952, work was resumed within the framework of the Niederbayerisches Städtebundtheater, at the time still a loose association.
Because the number of non-Lower Bavarian venues steadily decreased over the years, the special-purpose association decided to change its name to Landestheater Niederbayern in 2008.
The two departments in Landshut and Passau each have their own independent workshops, tailor shops, technical and administrative teams.