Saint-Mammès (French pronunciation: [sɛ̃ mamɛ]) is a commune in the Seine-et-Marne department in the Île-de-France region in north-central France, in the metropolitan area of Paris.

It is located 61 kilometres (38 mi) south-southeast of the centre of Paris, at the confluence of the Seine and Loing rivers.

Like the rest of Ile de France, Saint Mammès has an oceanic climate.

[5] The city is also served by the Comète bus (lines 3-6-8) that is mainly used by students who live in the nearby communities.

[6] Nevertheless you can distinguish some areas: the place of the Bulge and the Seine in the northwest, the Palottes in the west, the Guettes and Berville residences, situated respectively in the outskirts of the city and next to the train station, the Trop Chères area in the north, the city center, and the commercial zones as well as the suburban districts like the Sablonnières, Monthièvres, Roberies, Longues Raies, and Fonds.