The Theater Koblenz is a multi-arts theatre with its own ensembles for drama, music theatre, puppetry and ballet located in Koblenz, Germany. It has about 190 permanent employees from 22 nations and offers 500 seats in a theatre building from the 18th century not far from the Electoral Palace. The manager until the end of the 2024/2025 season is Markus Dietze. Venues include the Theater am Deinhardplatz, rehearsal stages 2 and 4 as well as the Festung Ehrenbreitstein for the summer performances. In addition, the theatre participated in the Koblenz Fortress Plays for several years. In the 2009/2010 season, it was renamed from Theater der Stadt Koblenz to its current name.

The Electoral Palace in Koblenz, was the residence of the last Archbishop and Elector of Trier, Clemens Wenceslaus of Saxony, who commissioned the building in the late 18th century. In the mid-19th century, the Prussian Crown Prince had his official residence there during his years as military governor of the Rhine Province and the Province of Westphalia. It now houses various offices of the federal government.