Château Ausone, Premier grand cru classé winery in Saint-Émilion, France

Château Ausone is a Premier Grand Cru Classé estate spread across limestone slopes in Saint-Émilion, where Merlot and Cabernet Franc grapes are grown. The property has cellars carved directly into the rock that serve as natural storage spaces for wine aging.

The name honours the Bordeaux poet and consul Ausonius (310–395), whose estate Lucaniacum is thought to have stood on the site; the place was recorded as Casteau Dauzone in 1592. From the 13th to the 16th century the Lescours family led the vineyard, and in 1690 it passed to Pierre Chatonnet, ancestor of today's Vauthier family. Classified Premier Grand Cru Classé A in 1955, the estate declined until Pascal Delbeck became winemaker in 1976, and it did not apply for the 2022 classification.

The name honours Decimius Magnus Ausonius (310–395), a Bordeaux-born statesman and poet who owned about 100 acres of vineyard; some believe the estate stands on the foundations of his villa. The site was recorded as Casteau Dauzone in 1592. The Madeleine chapel, a 12th-century structure on the property, is listed as a monument historique.

The estate sits at the southern gate of the medieval town of Saint-Émilion, with vines on the limestone plateau and the clay-limestone slope facing south to south-east. The château, its outbuildings, the quarries and the 12th-century Madeleine chapel are listed as monuments historiques. The wine ages in cellars cut into the limestone cliffs beneath the town.

Ausone was among the few estates spared by the frost of 1956, while neighbour Cheval Blanc lost several vintages and other neighbours saw their vines destroyed. The estate also keeps a second wine, Chapelle d'Ausone, made from lots not selected for the grand vin.