Saint-Aubin () is a commune in the Essonne department in ÃÂle-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 àl'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.