It is bordered by Argentina to its west and Brazil to its north and east, with the "Río de la Plata" (River of Silver) to the south and with the Atlantic Ocean to the southeast.
Mawatesan sareng Argentina ring kauh miwah kelod kauh sareng Brazil ring kalér miwah kangin, antuk Río de la Plata (Tukad Perak) sareng Samudra Atlantik ring kelod.