Wisconsin is part of the largest American Viticultural Area (AVA), the Upper Mississippi Valley AVA, which includes southwest Wisconsin, southeast Minnesota, northeast Iowa, and northwest Illinois.

[1] The Wisconsin Winery Association is a statewide organization that promotes wine making in the state.

Before he migrated to California and helped to found the wine industry there, he established a vineyard, winery and wine cellars overlooking the Wisconsin River at what is today the Wollersheim Winery near Prairie du Sac.

[3] Today over 110 wineries have commercial operations in Wisconsin, with most making wines from other fruits in addition to grapes.

[4] Some Wisconsin wineries rely upon vineyards in other states for all or part of their grape sources.