Saint-Aubin is a commune in the Essonne department in Île-de-France in northern France. Inhabitants of Saint-Aubin are known as Saint-Aubi…Saint-Aubin 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. The synchrotron SOLEIL, a collaboration between CEA and the Centre national de la recherche scientifique, is also located here, south of the village.