Château La Tour Blanche, or La Tour-Blanche, is a sweet white wine ranked as Premier Cru Classé in the original Bordeaux Wine Official Classification of 1855. Belonging to the Sauternes appellation in Gironde, in the region of Graves, the winery is located in the commune of Bommes.
Uniquely among classed growth wineries, the estate is the property of the French state, and the site of the La Tour Blanche School of Viticulture and Oenology.