Saint-Augustin may refer to:

• Saint Augustin Basilica, Annaba

• Village-Saint Augustin, New Brunswick, a community

• Saint-Augustin, Quebec (parish), a parish municipality
• Saint-Augustin, Quebec (municipality), a municipality and settlement
• Saint-Augustin Airport
• Saint-Augustin River
• Saint-Augustin-de-Desmaures, a city west of Quebec City
• Saint-Augustin-de-Woburn, a parish municipality in the Estrie region
• Saint-Augustin, a former municipality now part of the city of Mirabel, Quebec

• Saint-Augustin, Paris, a Catholic church
• Saint-Augustin (Paris Métro), a station on Line 9
• Saint-Augustin, Charente-Maritime, a commune
• Saint-Augustin, Corrèze, a commune
• Saint-Augustin, Pas-de-Calais, a commune
• Saint-Augustin, Seine-et-Marne, a commune
• Saint-Augustin-des-Bois, a commune in Maine-et-Loire

• Saint Augustin, Madagascar, a town and commune
  • Bay of Saint-Augustin, the town's eponymous bay

• Saint Augustine (disambiguation)