Baumgartner Casino, Protected cultural center in Penzing, Vienna, Austria.

Baumgartner Casino is a cultural venue located at Linzer Straße 297 offering multiple halls suited for different types of gatherings and celebrations. The complex houses rooms of varying sizes that accommodate private parties, corporate functions, and community events.

General Andreas Hadik von Futak built the site in 1779 as Schloss Oberbaumgarten. It later passed to the Esterházy princes, was converted into a casino in the 19th century, and in 1891/92 Eugen Sehnal added the large Festsaal. A donation brought it to the SPÖ, and today the SPÖ-linked Verband Wiener Arbeiterheime owns it.

The name Baumgartner Casino refers to the district of Baumgarten, not to gambling; the building was converted into a casino in the 19th century. Since 2009 the Festsaal and side rooms have been leased by a firm that uses them mainly for sound recordings, concerts and events. Preiser Records runs an analogue tube studio in the building, and the hall hosted the 2016 premiere of the opera Cindarella by the then eleven-year-old Alma Deutscher.

The building stands at Linzer Straße 297 in Penzing, near the Slama-Siedlung, with which it forms a protected zone. The historic Festsaal and side rooms are leased and used mainly for recordings and concerts, so visits depend on the event programme. The site is a heritage-protected object, not a public park.

The building's analog tube studio, used by Preiser Records, hosted recordings by Lang Lang, 2Cellos, Ólafur Arnalds and the Vienna Symphony Orchestra. In 2016 the hall saw the premiere of the opera Cindarella, written by the then 11-year-old Alma Deutscher.