Rivieren Castle (French: Château de Rivieren; Dutch: Kasteel ter Rivieren) is a 12th-century castle in Ganshoren, a municipality of Brussels, Belgium. The castle is surrounded by a pond (a vestige of the large medieval moat), in a park of 10 hectares (25 acres): Albert Park.

Originally a defence tower, the present-day castle was built in different phases from the 12th to the 19th centuries. Originally a possession of the Clutinck (Clutinc/Clutinckx) family, it later changed ownership several times until it finally was sold in 1973. Nowadays, it is used for conferences, receptions, expositions and similar kinds of events.

• List of castles and châteaux in Belgium
• History of Brussels
• Culture of Belgium
• Belgium in the long nineteenth century

• Media related to Rivieren Castle (Ganshoren) at Wikimedia Commons
• Chateau Rivieren (in French)
• Kasteel ter Rivieren, at routeyou.com (in Dutch)