Tannat is a red wine grape, historically grown in South West France in the Madiran AOC, and is now one of the most prominent grapes in Uruguay, where it is considered the "national grape".

South West France, or in French Sud-Ouest, is a wine region in France covering several wine-producing areas situated respectively inland from, and south of, the wine region of Bordeaux. These areas, which have a total of 16,000 hectares of vineyards, consist of several discontinuous wine "islands" throughout the Aquitaine region, and more or less to the west of the Midi-Pyrénées region.