| Marie de Breuillet | |
| Birth Place: | near Longpont, Aisne |
| Death Place: | Orléans, France |
| Partner: | Louis VI of France |
| Children: | Isabelle de France (1105–1175) |
| Father: | Renaud de Breuillet de Dourdan |
| Relatives: | Godefroy de Breuillet (brother) |
Marie de Breuillet de Dourdan (–), was a French noblewoman and the royal mistress and lover of Prince Louis of France (later King Louis VI of France) until 1104.
Born around 1080, perhaps near Longpont, Marie was the daughter of a knight, Renaud de Breuillet de Dourdan. She had three brothers, two of whom, N.N. de Brueillet and Godefroy de Breuillet became monks of the Longpont Abbey.[1]
She became a mistress of Louis VI of France, until 1104, when she left for a Parisian convent. In 1105, Marie gave birth to a daughter, Isabelle de France (1105–1175); married William of Vermandois, seigneur of Chaumont in 1117.