Where in France do claret wines come from

Bordeaux
Both red and white wines are made in Bordeaux. Red Bordeaux is called claret in the United Kingdom.

Red wines are generally made from a blend of grapes, and may be made from Cabernet Sauvignon, Merlot, Cabernet Franc, Petit verdot, Malbec, and, less commonly in recent years, Carménère.

White Bordeaux is made from Sauvignon blanc, Sémillon, and Muscadelle. Sauternes is a subregion of Graves known for its intensely sweet, white, dessert wines such as Château d'Yquem.

Read more...https://en.wikipedia.org/wiki/Bordeaux#Wine