Saint-Cyr-sur-Loire (French pronunciation: [sɛ̃ siʁ syʁ lwaʁ] ⓘ, literally Saint-Cyr on Loire) is a commune in the department of Indre-et-Loire in central France.

It is the third largest city in the Indre-et-Loire department, behind Tours and Joué-lès-Tours.

The commune has: Two senior high schools/sixth-form colleges in Tours, Lycée Choiseul and Lycée Jacques de Vaucanson, serve students in this commune.

[7] The Lycée Konan de Touraine-France, a private Japanese international school,[8] operated in the commune from 1991 to 2013.

[9] The École Japonaise Compleméntaire en Touraine (トゥレーヌ補習授業校 Tūrēnu Hoshū Jugyō Kō), a part-time Japanese supplementary school, is held in the École Republique in Saint-Cyr-sur-Loire.