Château-Grillet is a wine-growing AOC in the northern Rhône wine region of France, near Vienne, which produces white wine from Viognier grapes. The whole appellation, which is only 3.8 hectares (9.4 acres) in size, is owned by a single winery, Château-Grillet. The appellation was officially created in 1936.
Château-Grillet AOC is effectively an enclave of the Condrieu appellation, which also produces white Viognier-only wines. These appellations are located just south of Vienne in the northern part of the Rhône valley. The production of white wine in the Rhône region is relatively small compared to the red wines. Condrieu and Château-Grillet are the only appellations in northern Rhône that are exclusively white wine appellations.
The situation of an AOC (or other official wine designation) owned by a single estate is a situation known as a monopole. There are several other monopole estates in France including Romanée-Conti, La Tâche, La Romanée, Clos de Tart, and Clos de la Coulée de Serrant. The Neyret-Gachet family acquired the Château-Grillet estate in 1830, and the family retained ownership until the estate was purchased by French billionaire François Pinault in 2011. Today, Isabelle Baratin manages the production and sale of the estate's single wine: Vin Blanc de Château-Grillet. Only 10,000 bottles are produced each year. The estate also produces two Brandies: Fine du Château-Grillet and Marc du Château-Grillet. The former is distilled from the Château-Grillet wine while the latter is a pomace brandy.
The vines are situated in terraces on steep granite cliffs surrounding the estate where the soil is lighter and more fragmented than in the Condrieu AOC. The slopes are shaped in the form of a natural amphitheater with south-southeastern sun exposure. The estate's vines average 40 years of age, and as a result produce very low yields.
The slim brown bottles of Château-Grillet are easily recognised and are used by no other French winery. Until 1987, 70 centiliter bottles were used, rather than the 75 cl bottles used since.
Château-Grillet is one of the smallest appellations in France, but the area under vine expanded in the 1970s and 1980s (the era when Rhône wines started to see an increase in demand), from 1.7 hectares (4.2 acres) in 1971, to 2.3 hectares (5.7 acres) in 1977, 3.0 hectares (7.4 acres) in 1982 and 3.8 hectares (9.4 acres) in 1991, which has remained the vineyard area until at least 2005. This was achieved by actually planting the full area within the appellation border, and this is now practically fully planted to vines. Château-Grillet is sometimes erroneously claimed to be the smallest appellation in France, which is incorrect since several Burgundy Grand Cru appellations are smaller. At the start of the 1970s expansion, Château-Grillet was actually of the same size as Romanée-Conti, but its neighbour La Romanée is only of half as large, or 0.85 hectares (2.1 acres).
Château-Grillet is by tradition a wine which is intended to be drunk with some maturity, often around 10 years or more from the vintage year. This style has been kept by the appellation's single producer and sets Château-Grillet apart from the Condrieu wines from most producers, or indeed almost all wines produced from Viognier grapes, which are styled to be drunk fairly young and often aims more for opulence.
Aromas present in a good vintage Château-Grillet is typically apricot, truffle, and honey on the nose, and apricot, orange and tangerine on the palate. More floral aromas are present on the nose with some aging, typically eight years or more. The fruit aromas associated with Château-Grillet are therefore somewhat different than from those typically found in Condrieu, where pear is often found.
Château-Grillet cellars its wines for at least 24 months in a combination of new and old oak barriques.
The Château-Grillet AOC can only be used for still white wines made from Viognier. The planting density must be at least 8 000 vines per hectare, and the base yield is 37 hectoliter per hectare. The grape must reach a maturity giving at least 178 g/l sugar in the must (corresponding to 10.5 per cent potential alcohol) and the finished wines must have at least 11.5 per cent alcohol by volume, but no more than 14 per cent after any chaptalisation. The wines must be dry, with a maximum of 4 grams per liter of sugar.
- Livingstone-Learmonth, John (2005). The Wines of the Northern Rhône. Berkeley: University of California Press. pp. 225–230. ISBN 978-0-520-24433-7.
- Appellation regulations, version of October 28, 2009 on Legifrance
-  Molesworth, James (March 15, 2011). "Château Latour Owner Purchases Château-Grille". Wine Spectator. Retrieved May 24, 2011.
- Burgundy Report: Domaine du Vicomte Liger-Belair