The document provides demographic information about Buenos Aires, Argentina. It states that in 2001, there were over 12 million people residing in Buenos Aires and surrounding districts, making it home to one third of Argentina's population. The population density in Buenos Aires city proper is over 13,000 inhabitants per square kilometer. Racially, 89% of residents are white, 7% are mestizo, 2% are Asian, and 1% are black. The city limits are determined by the Rio de la Plata river to the east and northeast, the Riachuelo river to the south and southeast, and Avenida General Paz highway to the northwest, west and southwest. Buenos Aires is divided into 48 districts for administrative