Buenos Aires is the capital city of Argentina, situated on the eastern coast of the country. Buenos Aires is among the most culturally rich and cosmopolitan cities in the world. It is the country's economic, transportation, and cultural centre. Since its founding in the 16th century, Buenos Aires has been a significant influence on other cities around the world. It is famous for its captivating colonial buildings and modern structures that stand side by side to complement each other. Some of the places that make it famous include the stunning ancient buildings, Obelisco, Plaza de Mayo, Art Galleries, Casa Rosada, Teatro Colon and the colorful neighborhood of La Boca.

Census in Argentina is done every 10 years and 2010 was the last time it was conducted. The next census is scheduled for 2020. According to the 2010 census, Buenos Aires had a population of 2,891,082. Compared to other cities in Argentina, Buenos Aires is considered to be more diverse. The majority of the population is white of European descent, and there is a significant segment of the population that is Mestizo. When it comes to religious beliefs, Buenos Aires is predominantly Roman Catholic, but also has populations of Protestants, Jews, Muslims, and those who identify as non-religious. The Obelisco is one of the city's most famous landmarks. Erected in 1936, it commemorates the 400th anniversary of the first foundation of the city. Buenos Aires has been declared a city of books by UNESCO, and it’s no surprise with its more than 700 bookstores, leading the world in bookstores per capita.

The city of Buenos Aires is divided into 15 communes, which are then subdivided into 48 neighborhoods. The executive power is exercised by the Chief of Government, elected for a four-year term, who also appoints the cabinet. The Legislative power is composed by the Buenos Aires City Legislature. The Judiciary power is composed of the Superior Court of Justice, the Magistrate's Council, the Public Ministry, and other City Courts. Buenos Aires also has an autonomous police force, separate from the national police.

Buenos Aires has a diverse economy, with services, manufacturing, and commerce being the three largest sectors. The city is the financial, industrial, and commercial hub of Argentina. It has a GDP of about $84.7 billion, which is about 20 percent of Argentina's total GDP. The Port of Buenos Aires is the leading transshipment point for the foreign trade of Argentina.

Buenos Aires has a comprehensive infrastructure plan, with significant investment in transportation, energy, water and sewerage infrastructure, digital connectivity, and urban development. Buenos Aires also has a robust public transportation system, including the Buenos Aires Underground, the first underground railway system in Latin America and the Southern Hemisphere. The city is also working towards improving digital connectivity, with increasing coverage of high speed broadband.