San Lorenzo is a city in the south of the Province of Santa Fe, Argentina, located 23 km north of Rosario, on the western shore of the Paraná River, and forming one end of the Greater Rosario metropolitan area. It is the head town of the San Lorenzo Department, and it has about 46,000 inhabitants according to the 2010 census [INDEC].

The Province of Santa Fe is a province of Argentina, located in the center-east of the country. Neighboring provinces are from the north clockwise Chaco, Corrientes, Entre Ríos, Buenos Aires, Córdoba, and Santiago del Estero. Together with Córdoba and Entre Ríos, the province is part of the economico-political association known as the Center Region.