Coucy-le-Château-Auffrique is a commune in the Aisne department in Picardy in northern France. Its 1999 population for the commune was 995. The river Ailette forms most of the commune's southern border. Places of interests are the ruins of the Château de Coucy, a medieval garden, Domaine de la Grangère (a landmark classified in 1931) and a church.

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