Saint-Cyr-l'École (French pronunciation: [sɛ̃ siʁ lekɔl] ⓘ) is a commune in the western suburbs of Paris, France.

It used to host the training school for officers of the French army, the École spéciale militaire de Saint-Cyr (ESM), which was relocated to Coëtquidan in 1945.

Saint-Cyr-l'Ecole airfield is long established and lies on the edge of the commune.

It is used by light aircraft flown by private pilot owners and by members of aero clubs.

Senior high schools/sixth form colleges: Bibliothèque Albert Camus, which opened on 14 November 2013, is the community library.