Schloss Merkenstein, Tudor-style château in Bad Vöslau, Austria.

Schloss Merkenstein is a Tudor-style château below the Merkenstein castle ruin near Großau, in the Gainfarn cadastral area of Bad Vöslau, Lower Austria. It was built from 1829 for Joachim Eduard von Münch-Bellinghausen to plans by August Schwendenwein and Johann Romano von Ringe, replacing an 1801–1803 Swiss-style country house. It is the first château built in Austria in the Tudor style.

Josef Karl von Dietrichstein constructed the original building between 1801 and 1803. Following severe wartime destruction in 1945, it was later comprehensively rebuilt.

The chapel in the park is older than the château and was probably renovated in the 16th century; Joachim Eduard von Münch-Bellinghausen was later buried in a crypt beneath it, plundered during the Russian occupation. The Türkenbrunnen recalls the destruction of the nearby castle by the Turks in the Second Siege of Vienna. The park, laid out by Elisabeth von Dietrichstein, was open to the public.

The château is privately owned and viewable from the exterior, though interior access is not available to the public. The exterior grounds and garden can be visited while respecting the owner's privacy.

The park's chapel is older than the château itself, probably 16th-century, and Joachim Eduard von Münch-Bellinghausen was buried in a crypt beneath it; that crypt was looted during the Russian occupation after 1945. The Türkenbrunnen in the grounds recalls the destruction of the nearby castle by the Turks in the Second Siege of Vienna.