L
- Lachalade Abbey, see Chalade
- Lamanare Abbey (also known as Hyères Abbey), nuns, diocese of Toulon
- Le Landais Abbey (Abbaye Notre-Dame du Landais), monks, diocese of Bourges (Frédille, Indre)
- Langonnet Abbey, monks, diocese of Quimper, later Vannes (Langonnet, Morbihan)
- Lannoy Abbey (also known as Briotel Abbey), monks, diocese of Beauvais
- Lanvaux Abbey, monks, diocese of Vannes (Brandivy, Morbihan)
- Larivour Abbey (also Larrivour or l'Arivour) (Lusigny-sur-Barse, Aube)
- Lasteron Abbey (Abbaye de Saint-Bernard de Lasteron), nuns, diocese of Dax
- Lazières Abbey, nuns, diocese of Cahors
- Léoncel Abbey, monks, diocese of Die (Léoncel, Drôme)
- Lérins Abbey (Abbaye Notre-Dame de Lérins) (Île Saint-Honorat, Cannes, Alpes-Maritimes)
- Leyme Abbey (also known as Lerme Abbey or La Grâce-Dieu Abbey), nuns, diocese of Cahors (1220-?) (Leyme, Lot)
- Lézinnes Abbey (Abbaye de la Charité-lès-Lézines), nuns, then monks (1432), diocese of Langres (1184-?) (Lézinnes, Yonne)
- Lieu-Croissant Abbey, monks, diocese of Besançon (Geney, Doubs)
- Le Lieu-Dieu Abbey, nuns, diocese of Autun
- Le Lieu-Dieu Abbey, monks, diocese of Amiens
- Le Lieu-Notre-Dame Abbey, nuns, diocese of Lyon
- Le Lieu-Notre-Dame Abbey (Abbaye Notre-Dame du Lieu), nuns, diocese of Orléans (Romorantin-Lanthenay, Loir-et-Cher)
- Lissac Priory, dependent on Leyme Abbey, nuns, diocese of Cahors (1286-?) (Lissac-et-Mouret, Lot)
- Loc-Dieu Abbey, monks, diocese of Rodez (Martiel, Aveyron)
- Longpont Abbey (Abbaye Notre-Dame de Longpont), monks, diocese of Soissons (Longpont, Aisne)
- Longuay Abbey (also Longué Abbey), monks, diocese of Langres (1149-1790) (Aubepierre-sur-Aube, Haute-Marne)
- Longvillers Abbey, monks, diocese of Boulogne-sur-Mer (Pas-de-Calais)
- Loos Abbey (also Looz Abbey) (Abbaye Notre-Dame de Loos or de Looz), monks, diocese of Tournai (1149-?) (Loos, Nord)
- Loroy Abbey (also Lorroy or Lorois Abbey) in Berry, monks, diocese of Bourges (Méry-ès-Bois, Cher)
- Louroux Abbey (also Le Louroux Abbey), monks, diocese of Angers (Vernantes, Maine-et-Loire)
- Lucelle Abbey (also Lützel Abbey), monks, diocese of Basle (1124-1790) (Lucelle, Haut-Rhin and Pleigne in Switzerland)
- La Lum-Dieu Abbey (also known as Fabas Abbey), nuns, diocese of Comminges
- Lützel Abbey, see Lucelle Abbey
- Le Lys Abbey (Abbaye du Lys or Abbaye royale du Lys), nuns, diocese of Sens (Dammarie-les-Lys, Seine-et-Marne)
Read more about this topic: List Of Cistercian Monasteries In France