Boulevard Saint-Germain is a major street in Paris on the Rive Gauche of the Seine.
It curves in a 3.5-kilometre arc from the Pont de Sully in the east to the Pont de la Concorde in the west and traverses the 5th, 6th and 7th arrondissements. At its midpoint, the boulevard is traversed by the north-south Boulevard Saint-Michel. The boulevard is most famous for crossing the Saint-Germain-des-Prés quarter from which it derives its name.