Old Longueuil (French: Vieux-Longueuil) is a historic neighbourhood located in the borough of the same name, in the city of Longueuil, Quebec, Canada.
There is no universal definition of what exactly constitute the Old Longueuil neighborhood but it invariably includes at least the territory corresponding to the pre-1961 city of Longueuil.
Old Longueuil, was named a heritage district by the city in 1993, and features 450 buildings built before 1945. Many historic buildings are found in this district, such as the Co-Cathedral of Saint-Antoine-de-Padoue, the ruins of Fort Longueuil, and Saint Mark's Anglican Church. Rue Saint-Charles is the main street in this neighbourhood and features many small businesses, among them restaurants, bars, and corner stores. The borough hall of Le Vieux-Longueuil borough is also in the neighbourhood.
Coordinates: 45°32′15″N 73°30′40″W / 45.5374°N 73.5112°W