Theater Olpketal, Theater venue in Lücklemberg, Dortmund, Germany

Theater Olpketal is a small family-run theatre on Olpketalstraße in Dortmund's Lücklemberg district, with seating for nearly 200 and three bars. Its hall, foyer and function rooms occupy a building that once housed the Gasthaus Zum Erlenkrug. The spatial concept and stage design, in place since 1989, are by Dortmund stage designer Michael Wienand.

The building housed the Gasthaus Zum Erlenkrug in the late 19th and early 20th centuries, when Kirchhörde and Lücklemberg were popular excursion destinations. Damaged by an aerial bomb in the final days of World War II, it was repaired after 1945 and later served as a warehouse before standing empty. Bruno Knust rented it and converted it into an experience theatre in 1989; in May 2025 he closed his own operation, and the Fletch Bizzel theatre was to move in from November 2025.

The theatre's programme centres on Bruno Knust, known as Günna, who performed his Ruhr-area cabaret several times a week, and on guest appearances by Robert Kreis, Lioba Albus, Karl Dall, Wolfgang Trepper, Jürgen Becker and Torsten Sträter. Knust announced in early 2025 that he would end his own operation after the season in May 2025; from November 2025 the free Dortmund ensemble Fletch Bizzel was to move its performances into the house on Olpketalstraße.

The hall seats just under 200 spectators and has three bars, one of them on the gallery level. Two Gesellschaftsräume on the first-floor gallery can be rented for private or business celebrations in connection with a performance. The building stands on Olpketalstraße in Lücklemberg, in Dortmund's south.

The stage set has stood unchanged since 1989, designed by Dortmund stage designer Michael Wienand, who also devised the theatre's spatial layout. The gallery on the first floor was later converted into two function rooms that can be rented for private or business celebrations alongside a performance.