Finspång Castle, Neoclassical château in Finspång, Sweden.

Finspång Castle is a Dutch Classicist manor house built 1668–1685 on an islet in the Finspång River. Its three connected blocks are painted pale yellow with white bands and pilasters; the taller central block has a projecting portico of four white columns beneath a triangular pediment with a round clock face, and a small clock tower with a dark cupola sits on the dark grey mansard roof. A wide stone staircase leads to the dark double door.

Dutch architect Adriaan Dortsman designed the building in 1666 for industrialist Louis De Geer. This project strengthened the architectural connections between Sweden and the Netherlands during that era.

The castle chapel in the north wing reflects the Reformed faith of the De Geer family and the Walloon ironworkers they brought to Finspång. Remodelled in 1890, it is now used for services by the Church of Sweden. The De Geer family gave its name to the baronial line De Geer af Finspång.

The castle itself is not open to the public: it serves as the head office of Siemens Energy's turbine manufacturing. The castle park is open to all, and the wings, built in 1742, house a hotel, conference facilities and a restaurant.

The 1831 orangery houses one of Sweden's oldest living grapevines. This historic vine continues to grow within the protected greenhouse and is a rare survivor from past centuries.