San Pedro, full name Rincón de San Pedro Dávila de los Arrecifes, is a city and port in the Province of Buenos Aires, Argentina, beside the P…San Pedro, full name Rincón de San Pedro Dávila de los Arrecifes, is a city and port in the Province of Buenos Aires, Argentina, beside the Paraná River. It is one of five localidades in the Partido de San Pedro and its administrative seat. It is 164 km from Buenos Aires via National Route 9, and 141 km from Rosario.