Poeke Castle, Neoclassical castle in Aalter, Belgium

Poeke Castle is a pale pinkish-beige stone building with a symmetrical facade, a central triangular pediment topped with carved ornament, and two round end towers with tall dark conical roofs and finials. Its dark grey slate roof has a row of dormer windows, and the upper two of three storeys are lined with tall rectangular white-framed windows. A short stone balustrade and a central white double door with a small balcony face a formal garden and gravel path; the building stands on an island in 56 hectares of park, reached by bridges at front and rear.

Poeke is first mentioned in 1139, though the date of its first fortification is unknown. In 1382 Eulaard II of Poeke died at the Battle of Beverhoutsveld trying to halt the Ghent militia that had taken his fort. Philip the Good retook the castle on 5 July 1452, had the 87 Ghent defenders hanged and the building destroyed; rebuilding took over a century. Baron Victor Pycke de Peteghem bought the estate in 1872 and rebuilt it until 1875, raising the roof over the third storey and reworking the interior and gardens.

The castle's name comes from the lordship of Poeke, first recorded in 1139. Since 1977 the municipality of Aalter has used the building for cultural meetings and festivities, and the 56-hectare park is open for walks. The estate has also served as a film set, including for the 2012 BBC/HBO production Parade's End.

The castle stands in a 56-hectare park, with bridges at the front and rear giving access across the surrounding water. The building is managed by Toerisme Vlaanderen; the municipality of Aalter owned it from 1977 until the 2021 transfer to the Flemish government. The park is a protected landscape, listed as such in 1978.

In 1881 a large kennel for the owner's hunting dogs was built at the castle; it was heated by a bakery oven constructed next to it. The castle and its grounds have repeatedly served as a film set, including the 1991 BRT series De Bossen van Vlaanderen, the 2012 BBC/HBO production Parade's End and the 2019 Netflix series De bende van Jan de Lichte.