Saint-Aubin (French pronunciation: [sɛ̃.t‿obɛ̃] ⓘ) is a commune in the Essonne department in Île-de-France in northern France.

Inhabitants of Saint-Aubin are known as Saint-Aubinois.

In the neighbourhood of Saclay and Orsay, Saint-Aubin is the home of two sites of the Commissariat à l'énergie atomique (CEA).

The synchrotron SOLEIL, a collaboration between CEA and the Centre national de la recherche scientifique (CNRS), is also located here, south of the village.

This Essonne geographical article is a stub.