The Theater in der Josefstadt is a theater in Vienna in the eighth district of Josefstadt. It was founded in 1788 and is the oldest still performing theater in Vienna. It is often referred to colloquially as simply Die Josefstadt.

Following remodeling and rebuilding in 1822 — celebrated by the performance of the overture Die Weihe des Hauses ('Consecration of the House') by Beethoven — opera was staged there including Meyerbeer and Wagner. From 1858 onwards the theatre gave up opera and instead concentrated on straight theatre and comedy.