Saint-Mammès 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 south-southeast of the centre of Paris.It is situated at the confluence of the Seine and the Loing rivers. The Seine borders the northern boundaries of the city, while the Loing borders on the west.

Saint Mammes (Mamas, Mammas, Mammet) of Caesarea ; (; ; ; ) is a semi-legendary child-martyr of the 3rd century. He was martyred at Caesarea. His parents, Theodotus and Rufina, were also martyred.