Maubuisson Abbey is a Cistercian nunnery at Saint-Ouen-l'Aumône, in the Val-d'Oise department of France. It was founded in A.D. 1236 by Blanche of Castile, Queen of France, who may have been buried there in 1252. The site is now within the north-western suburbs of Paris. The surviving buildings are listed as a monument historique.