Fondation Folon, Art museum in La Hulpe, Belgium.

Fondation Folon is a museum in the former farm of La Hulpe Castle, within the Domaine Solvay. It holds 350 works by Belgian artist Jean-Michel Folon across fifteen exhibition rooms. The farm was designed by architect Jean-Pierre Cluysenaar. The museum displays watercolours, screen prints, engravings, posters, diverted objects, stained glass and sculptures.

Jean-Michel Folon created the Fondation Folon on 28 October 2000, installing it in the farm of La Hulpe Castle, built by architect Jean-Pierre Cluysenaar. After his death on 20 October 2005, Stéphanie Angelroth took over the foundation's leadership in line with his wishes. The museum team numbered sixteen staff in 2025.

The museum occupies the former farm of La Hulpe Castle, designed by architect Jean-Pierre Cluysenaar. Its fifteen rooms hold 350 works: watercolours, screen prints, engravings, posters, diverted objects, stained glass and sculptures. Interactive displays such as giant books, optical effects and projections accompany the visit, and educational activities focus on the environment and human rights.

The museum occupies the former farm of La Hulpe Castle inside the Domaine Solvay, a large park with woods and lakes; the castle itself dates from 1842 and is used for receptions and seminars. The site lies in Walloon Brabant, reachable from Brussels by train toward La Hulpe. Fifteen exhibition rooms follow one continuous route, so allow time for both the museum and a walk through the grounds.

The honorary committee included César, Balthus, Valério Adami, Jorge Semprun and Simone Veil. Folon staged the museum himself, and after his death on 20 October 2005 Stéphanie Angelroth took over its direction, as he had wished.