Buenos Aires is the capital and largest city of Argentina and serves as the country's political, economic, and cultural center. The city has an estimated population of about 3,152,780 inhabitants (2026 estimate). Located on the western shore of the Río de la Plata estuary, Buenos Aires was first founded by the Spanish in 1536 and permanently established in 1580. During the colonial period it developed into a major port linking South America with Europe. In the 19th century, the city played a central role in Argentina’s independence movement and later became a rapidly growing metropolis fueled by immigration, particularly from Italy and Spain.
Buenos Aires is known for its European-influenced architecture and vibrant cultural life. Among its most famous landmarks are the Plaza de Mayo, the historic Casa Rosada, and the grand Teatro Colón, one of the world’s leading opera houses. The city is also the birthplace of renowned figures such as writer Jorge Luis Borges and footballer Sergio Agüero.
Buenos Aires in Argentina
58.4° W
Buenos Aires Population Evolution
The population of Buenos Aires in 2026 is estimated to 3,152,780 inhabitants. This estimate is taken from our extrapolation of available data and not an official estimate.
Population Summary
| Year | Population | Change |
|---|---|---|
| 1869 | 187,126 | |
| 1947 | 2,982,580 | +1,493.9% |
| 1970 | 2,972,453 | -0.3% |
| 2000 | 2,995,397 | +0.8% |
| 2022 | 3,121,707 | +4.2% |
Interactive Map of Buenos Aires
What to see in Buenos Aires
Casa Rosada
Colón Theater
Barolo Palace
Puerto Madero
Plaza de Mayo
Obelisco de Buenos Aires
obeliskCaminito
streetFamous People Born in Buenos Aires
Jorge Luis Borges
writerCristina Fernández de Kirchner
presidentpresident of Argentina from 2007-2015, vice president of Argentina since 2019 to 2023
Ricardo Darín
actorArgentine actor
Sergio Agüero
footballerSister Cities of Buenos Aires
Sister cities, also known as twin cities, are formal partnerships between cities in different countries to promote cultural and commercial ties.
This list is based on publicly available structured data and may differ slightly from official municipal publications.
| City | Country | Population |
|---|---|---|
| Beijing | 🇨🇳 People's Republic of China | 21,893,095 |
| Moscow | 🇷🇺 Russia | 13,274,285 |
| São Paulo | 🇧🇷 Brazil | 11,451,999 |
| Cairo | 🇪🇬 Egypt | 9,801,536 |
| Seoul | 🇰🇷 South Korea | 9,668,465 |
| Berlin | 🇩🇪 Germany | 3,782,202 |
| Brasília | 🇧🇷 Brazil | 2,996,899 |
| Kyiv | 🇺🇦 Ukraine | 2,952,301 |
| Osaka | 🇯🇵 Japan | 2,751,862 |
| Warsaw | 🇵🇱 Poland | 1,862,402 |
| Prague | 🇨🇿 Czech Republic | 1,397,880 |
| Yerevan | 🇦🇲 Armenia | 1,106,300 |
| Naples | 🇮🇹 Italy | 913,462 |
| Zagreb | 🇭🇷 Croatia | 767,131 |
| Seville | 🇪🇸 Spain | 689,423 |
| Rotterdam | Netherlands | 664,311 |
| Athens | 🇬🇷 Greece | 643,452 |
| Toulouse | 🇫🇷 France | 514,819 |
| Tel-Aviv | 🇮🇱 Israel | 467,875 |
| Miami | 🇺🇸 United States | 442,241 |
| Bilbao | 🇪🇸 Spain | 351,124 |
| Vigo | 🇪🇸 Spain | 294,489 |
| Oviedo City | 🇪🇸 Spain | 186,513 |
| Cádiz | 🇪🇸 Spain | 109,950 |
| Guadix | 🇪🇸 Spain | 16,453 |