A clear ranking is difficult because it is difficult to compare the wine-growing areas defined in the individual countries with different hierarchies. The top candidate is the historical landscape La Mancha in Spain with around 450,000 hectares of vineyards. Within this region, the DO area of the same name is located with around 200,000 hectares. The French is just as huge Midi with over 400,000 hectares of vineyards. This area consists of several wine-growing regions, the largest part being the double region Languedoc-Roussillon with 224,000 hectares. Italy has over 110,000 hectares Sicily by far the largest wine-growing region. The 113,000 hectares of the French region Bordeaux are divided into over 30 appellations. Also in California there are very large wine growing areas ( AVA = American Viticultural Area).
See regarding others Records also under the keywords smallest vineyards & vineyards. northernmost vineyard. southernmost vineyard. highest vineyard and steepest vineyard, A complete list of keywords relevant to vineyards can be found at vineyards contain.
Graphics: Der Winzer 1 - Weinbau, Ulmer Verlag 2019, 4th edition