Saint-Cyr-l'École is a commune in the western suburbs of Paris, France. It is located 21.4 km from the centre of Paris. It used to host the training school for officers of the French army, the École spéciale militaire de Saint-Cyr, which was relocated to Coëtquidan in 1945. The old buildings of the ESM are now used by the lycée militaire de Saint-Cyr. Inhabitants are called Saint-Cyriens.