The Barn Theatre, located in Welwyn Garden City, England is a Grade II listed, 17th-century timber-framed barn converted to a community theatre in 1931.

The original barn or barns that form the current building were constructed from timbers dated to 1597 by dendrochronology in 2014, most probably sourced from nearby Sherrardspark Wood.

[4] The building was Grade II listed on 4 November 1980 and bought by the Barn Theatre Trust in 1984.

[6] There are two performance areas: The building also houses a bar, green room, dressing rooms, rehearsal space, workshop, and properties and costume stores.

The resident theatre company, The Barn Theatre Club, presents monthly productions in the main auditorium and other shows in the studio, alongside other community and club events.