Coucy-le-Château-Auffrique (French pronunciation: [kusi l(ə) ʃɑto ofʁik]; Picard: Couchi-Catieu-Aufrike) is a commune in the Aisne department in Hauts-de-France in northern France.

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Coucy-le-Château-Auffrique
Commune
Ramparts
Coat of arms
Location of Coucy-le-Château-Auffrique
Coucy-le-Château-Auffrique Show map of France Coucy-le-Château-Auffrique Show map of Hauts-de-France
Coordinates: 49°31′13″N 3°19′21″E
Country	France
Region	Hauts-de-France
Department	Aisne
Arrondissement	Laon
Canton	Vic-sur-Aisne
Government
• Mayor (2020–2026)	Sophie Boutroy[1]
Area 1	11.46 km2 (4.42 sq mi)
Population  (2021)[2]	987
• Density	86/km2 (220/sq mi)
Time zone	UTC+01:00 (CET)
• Summer (DST)	UTC+02:00 (CEST)
INSEE/Postal code	02217 /02380
Elevation	47–147 m (154–482 ft) (avg. 112 m or 367 ft)
1 French Land Register data, which excludes lakes, ponds, glaciers > 1 km2 (0.386 sq mi or 247 acres) and river estuaries.

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Coucy is located west of Laon on the road between Tergnier (north) and Soissons (south) north-northeast of Paris.

The river Ailette forms most of the commune's southern border.

• Moses ben Jacob of Coucy
• Samson of Coucy
• Louis-Xavier Gargan [fr]
• César de Vendôme, (born 7 June 1594)
• Ferdinand Stanislas Bigot (6 May 1809 – 1890), mayor of Coucy-le-Château in the 1870s
• François Pipelet de Leury, (1722–1809), director of the Royal Academic Surgery, doctor of the royal family, mayor of Coucy-le-Château for thirty years. Lieutenant of the first surgeon for the king.
• Enguerrand VII de Coucy
• Barbin Pierre Philibert (1819-1868) born in Coucy-le-Chateau, grandfather of the actor Rudolph Valentino.

• Ruins of the Château de Coucy. The modern town is squeezed into the space within the medieval walls.
• A medieval garden
• Domaine de la Grangère (a green space for the garden of the governor's house at the time) - landmark classified in 1931
• A church - rebuilt after World War I.
• The forest nearby Coucy is the place where the Paris Gun was located and first used in WWI.

• Communes of the Aisne department
• List of medieval bridges in France