The conurbation spreads south, west and north of Buenos Aires city.

The 24 suburban partidos (counties) grew more than sixfold in population between the 1947 and 2022 censuses – or nearly 2.5% annually, compared to 1.4% for the nation as a whole.

[5][1] While annual growth for the suburban area slowed to 0.8% between 2010 and 2022, the 14 million inhabitants in the entire 30-county area plus the City of Buenos Aires account for a third of the total population of Argentina and generate nearly half (48%) of the country's GDP.

In colloquial speech, people refer to the "Buenos Aires' conurbation" as the set of municipalities that surround the City of Buenos Aires, and which are mostly populated by working-class or middle-class communities.

The National Institute of Statistics and Censuses (INDEC) has defined Greater Buenos Aires.