Grandselve Abbey (Abbaye de Notre Dame de Grandselve) was a Cistercian monastery in south-west France, at Bouillac, Tarn-et-Garonne. The original foundation existed from 1114 to the time of the French Revolution. It was one of the most important Cistercian abbeys in the south of France. Iniitially, in 1114, it was a Benedictine foundation set up by Géraud de Sales. It became subject to Clairvaux Abbey in 1144 or 1145.