The Champagne wine region extends across five French departments: Marne, Aube, Aisne, Haute-Marne and Seine-et-Marne.
Marne contains the largest share of Champagne’s vineyards, including important areas around Reims, Épernay and the Montagne de Reims. Aube, farther south, includes the Côte des Bar, another major production area. Aisne contains vineyards in the Vallée de la Marne, while Haute-Marne and Seine-et-Marne contain smaller portions of the officially delimited appellation area.
This geographic count refers to departments, which are administrative divisions of France, not to Champagne’s wine subregions. The commonly named subregions include the Reims Mountain, Marne Valley, Côte des Blancs and Côte des Bar; these are wine-geography terms rather than departments.
A common mix-up is confusing the Champagne wine region with the former administrative Champagne-Ardenne region. The wine appellation crosses administrative boundaries and includes vineyard zones in five departments, although production is heavily concentrated in Marne and Aube.