Folkoperan is an opera house in Stockholm, Sweden, at Hornsgatan 72 in the southern district of Södermalm.
The opera house is located in a building which was designed by architect Höög & Morssing in elegant 1920s Nordic Classicism.
It was first erected by the cinema owner and builder John A. Bergendahl (1872–1958) at the site of the former Maria saluhall.
It has become much appreciated by the Swedish opera audience due to its unconventional productions and smaller, more intimate stage.
Folkoperan celebrated its 25th anniversary with the new opera, Jeppe: The Cruel Comedy, written and directed by Claes Fellbom and composed by Sven-David Sandström (1942–2019).