Schloss Weinberg, Renaissance castle in Kefermarkt, Austria.

Schloss Weinberg is a castle in Kefermarkt, Upper Austria, on a ridge of the Buchberg at about 600 m. Its core is a Gothic residential tower, rebuilt in the 16th century as a Renaissance palace around a rectangular courtyard. A square tower with an onion dome, added after an 1882 fire, rises above the four-storey main building.

The castle was first recorded in the 13th century and was rebuilt from Gothic to Renaissance style under the Zelkinger family. In 1629 it passed to the Thürheim nobility, who shaped much of its current appearance.

The Ahnensaal has an original stucco ceiling from the early 17th century that visitors can still see today. The Kaisersaal regularly serves as a venue for concerts, weddings, and ceremonies.

The castle is easy to reach by car and has parking on the grounds. Visitors who want to see the historic halls should check ahead, as some rooms may be reserved for private events.

The castle chapel was rebuilt in 1635 after a fire in 1617, and Bartolomeo Carlone made its ceiling stuccoes; the altarpiece is attributed to Bartolomeo Altomonte. Much of the interior decoration, an arms collection and a family museum were lost in the 1945 looting by Soviet troops.