Saint-Hilaire (French pronunciation: [sɛ̃.t‿ilɛʁ] ^ⓘ; Occitan: Sant Ilari) is a commune in the Aude department in the Occitanie region in southern France.

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Saint-Hilaire
Commune
A general view of Saint-Hilaire
Coat of arms
Location of Saint-Hilaire
Saint-Hilaire Show map of France Saint-Hilaire Show map of Occitanie
Coordinates: 43°05′38″N 2°18′38″E
Country	France
Region	Occitania
Department	Aude
Arrondissement	Limoux
Canton	La Région Limouxine
Intercommunality	Limouxin
Government
• Mayor (2020–2026)	Jean-Louis Carbonnel[1]
Area 1	23.02 km2 (8.89 sq mi)
Population  (2021)[2]	713
• Density	31/km2 (80/sq mi)
Time zone	UTC+01:00 (CET)
• Summer (DST)	UTC+02:00 (CEST)
INSEE/Postal code	11344 /11250
Elevation	146–582 m (479–1,909 ft) (avg. 170 m or 560 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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The commune of Saint-Hilaire is situated in the Aude department, midway between Limoux and Carcassonne in the region of the Carcassès. It is mostly covered by the forest of Crausse-Rabassié. The river Lauquet borders it to the north. It is crossed by the Meridian of Paris, otherwise known as the Green Meridian.

The history of Saint-Hilaire is closely linked with that of the abbey. It begins in the Roman era but the most important remains date from the Middle Ages. In the eighth century, the abbey was built under the name of Saint Saturnin and then Saint Hilaire, Bishop of Carcassonne in the sixth century. Over the course of centuries, the village grew to surround the abbey.

The abbots built fortifications around the village to protect it from the troubles of the Hundred Years War. A document of 1386 regulates the care of the keys of the village gates. In 1574, the village was burned and partly destroyed by the Protestants of the Lord of Villar.

During the French Revolution, Saint-Hilaire experienced some troubles. In 1792, troops had to be sent to maintain public order.

Its inhabitants are known as Saint-Hilairois.

• Limoux wine
• Communes of the Aude department