Schloss Schönbühel is a castle in the Lower Austrian town of Schönbühel-Aggsbach, below Melk on the right bank of the Danube.

The castle is built on rock approximately 40 metres (130 ft) above the level of the river Danube.

The castle was begun in the early twelfth century by Marchwardus de Schoenbuchele as a defensive fortress.

When his descendant Ulrich von Schonpihel died at the beginning of the fourteenth century, the family was extinguished.

In 1930 the Schönbühel estate was sold to Count Oswald von Seilern und Aspang.