Geography of Seine-et-Marne

historic province in the northeast of France

forest in France

[[File:Composition communale de Marne-la-Vallée (fin 2013).svg|thumb|Sections of Marne-la-ValléeThe different communes making up Marne-la-Vallée:

Sénart (formerly Melun-Sénart) is a new town in southern Île-de-France, covering parts of the departments of Seine-et-Marne and Essonne.