Saint-Julien is a small but important red wine appellation of the Haut-Médoc district on the Left Bank of Bordeaux in south-western France. Its reputation is based on its status as a reliable source of consistently elegant, age-worthy wines.

Sandwiched between the more famous appellations of Pauillac and Margaux, Saint-Julien is sometimes unfairly overlooked because it does not have a first growth chateau in the 1855 Bordeaux classification. Pauillac has three of the five Médoc first growths and Margaux has one.