Nemours (French: [nəmuʁ] ⓘ) is a commune in the Seine-et-Marne department in the Île-de-France region in north-central France.

Nemours is located on the Loing and its canal, c. 42 km (26 mi) south of Melun, on the Moret–Lyon railway.

Nemours is supposed to derive its name from the woods (nemora) in the midst of which it formerly stood, and discoveries of Gallo-Roman remains indicate its early origin.

In 1585 a treaty revoking previous concessions to the Protestants was concluded at Nemours between Catherine de' Medici and the Guises.

The city also hosts the Musée de Préhistoire d'Île-de-France, museum dedicated to prehistory in Île-de-France region.