Crouy-sur-Ourcq (French pronunciation: [kʁui syʁ uʁk] ⓘ, literally Crouy on Ourcq) is a commune in the Seine-et-Marne department in the Île-de-France region in north-central France.

Inhabitants of Crouy-sur-Ourcq are called Crouyciens.

The town has one preschool (école maternelle), one elementary school (école élémentaire), and the junior high school Collège le Champivert.

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