Aspremont-Lynden Castle (Dutch: Kasteel d'Aspremont-Lynden) is a castle in Oud-Rekem in the commune of Lanaken, province of Limburg, Belgium.
The present castle, on the site of a mediaeval predecessor, was constructed by the noble family of d'Aspremont-Lynden, Counts of Rekem, in the early 17th century, in the style of the Maasland Renaissance.
The building served during the 19th and 20th centuries as a prison and a psychiatric hospital. It is now a conference centre and restaurant.
