How many citizens are there in Buenos Aires city?

Census data In the census of 2001 there were 12,129,819 people residing in the city and 31 surrounding districts, making metro Buenos Aires home to one in three Argentines.8 The population density in Buenos Aires proper was 13,680 inhabitants per square kilometer (34,800 per mi2), but only about 2,400 per km2 (6,100 per mi2) in the suburbs. More.

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