As of January 2025, an important part of the population in the Greater Buenos Aires area in Argentina were in the age groups between 25 and 34 years of age.

Argentina Population: Urban: Employed: GBA: Buenos Aires City data was reported at 1,563.000 Person th in Dec 2025. This records a decrease from the previous number of 1,626.000 Person th for Sep 2025. Argentina Population: Urban: Employed: GBA: Buenos Aires City data is updated quarterly, averaging 1,489.000 Person th from Mar 2003 (Median) to Dec 2025, with 89 observations. The data reached an all-time high of 1,626.000 Person th in Sep 2025 and a record low of 1,217.000 Person th in Mar 2003. Argentina Population: Urban: Employed: GBA: Buenos Aires City data remains active status in CEIC and is reported by National Institute of Statistics and Censuses. The data is categorized under Global Database’s Argentina – Table AR.G: Employment: Urban: EPH. Q4 2015 & Q1 2016 data point for this series has not been released by INDEC. Data points will be uploaded once becomes available from the source.

As of January 2025, the province of Buenos Aires registered the highest number of inhabitants, with over 17.8 million. Córdoba and Santa Fe followed far behind with 3.91 and 3.58 million, respectively. The city of Buenos Aires ranked as the third most populated metropolitan area of Latin America, only behind São Paulo and Mexico City.

In 2025, approximately 23 million people lived in the São Paulo metropolitan area, making it the biggest in Latin America and the Caribbean and the sixth most populated in the world. The homonymous state of São Paulo was also the most populous federal entity in the country. The second place for the region was Mexico City with 22.75 million inhabitants. Brazil's cities Brazil is home to two large metropolises, only counting the population within the city limits, São Paulo had approximately 11.45 million inhabitants, and Rio de Janeiro around 6.21 million inhabitants. It also contains a number of smaller, but well known cities such as Brasília, Salvador, Belo Horizonte and many others, which report between 2 and 3 million inhabitants each. As a result, the country's population is primarily urban, with nearly 88 percent of inhabitants living in cities. Mexico City Mexico City's metropolitan area ranks sevenths in the ranking of most populated cities in the world. Founded over the Aztec city of Tenochtitlan in 1521 after the Spanish conquest as the capital of the Viceroyalty of New Spain, the city still stands as one of the most important in Latin America. Nevertheless, the preeminent economic, political, and cultural position of Mexico City has not prevented the metropolis from suffering the problems affecting the rest of the country, namely, inequality and violence. Only in 2023, the city registered a crime incidence of 52,723 reported cases for every 100,000 inhabitants and around 24 percent of the population lived under the poverty line.