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Drone aerial view of Congress Square and its surroundings, Buenos Aires, Argentina

City South America

Buenos Aires

Buenos Aires is the capital city of Argentina. It sits beside a wide, brown river. It is famous for a dance called the tango and for colorful houses.

Buenos Aires, the capital of Argentina, lies on the Río de la Plata, 240 kilometers from the Atlantic Ocean. Founded twice, in 1536 and 1580, it grew into South America's largest port and a city of wide avenues, lively neighborhoods and the tango. About 3.1 million people lived in the city in 2022.

Buenos Aires, Argentina's capital and federal district since 1880, stands where the Paraná delta widens into the Río de la Plata estuary, at the edge of the Pampas. Refounded by Juan de Garay in 1580, it boomed with European immigration and grain and beef exports, was remodeled on Haussmann's Paris around 1910, and today has 3,121,707 people (2022) at the heart of a metropolitan area of more than 17.5 million.

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Photo: ProtoplasmaKid, CC BY-SA 4.0, via Wikimedia Commons

Discover Buenos Aires

Buenos Aires is the capital city of Argentina.

It is a very big city beside a wide river. People who live here are called porteños, the port people.

Buenos Aires is the capital of Argentina, in South America. It sits on the shore of the Río de la Plata, a huge estuary where rivers meet the sea, 240 kilometers from the Atlantic Ocean. Behind it stretch the Pampas, flat grasslands that are Argentina's main farming region.

About 3.1 million people lived in the city in 2022, and more than 17.5 million in Greater Buenos Aires. People from Buenos Aires are called porteños, "people of the port," because so many of their families arrived by ship from Europe. The city is known for its wide avenues, its many neighborhoods with their own cafés and soccer teams, and the tango.

Buenos Aires lies at the northeastern edge of the Pampas, where the Paraná delta widens into the Río de la Plata estuary, 240 km from the Atlantic. The city proper, coextensive with the federal district, covers 203 km² and had 3,121,707 people in the 2022 census; Greater Buenos Aires, about 3,885 km², had 17,523,996. It is Argentina's center of commerce, industry, politics, culture and technology and, Britannica notes, the chief port of the country and the largest in South America.

The poet Ezequiel Martínez Estrada called it 'the Head of Goliath', a giant head on a frail body, for the way its wealth and influence overshadow the rest of the country. Britannica describes a grand city of wide avenues, more European than Latin American in character, with little colonial architecture; it is chiefly a city of distinct neighborhoods (barrios), each with its own coffeehouses or bars, a tradition going back to the colonial pulpería, a general store and bar.

Country
Argentina (capital)
People in the city (2022 census)
3,121,707
People in Greater Buenos Aires (2022)
17,523,996
Area of the city
203 km²
Drone aerial view of Congress Square and its surroundings, Buenos Aires, Argentina
Photo: ProtoplasmaKid, CC BY-SA 4.0, via Wikimedia Commons

Famous places

In the middle of Buenos Aires is a big square called the Plaza de Mayo.

On one side is a pink building where the government works. A tall white tower, the Obelisk, stands on a giant wide street. In La Boca, the houses are painted bright colors.

The city grew outward from the Plaza de Mayo, a historic square. At one end is the Casa Rosada, the "Pink House," where Argentina's government works; at the other is the old Cabildo, the colonial town hall. A broad avenue leads from the square to the National Congress.

Avenida 9 de Julio is called the widest avenue in the world, and an obelisk from 1936 stands in its middle. The Colón Theatre, opened in 1908, is a magnificent opera house where famous opera stars perform. In La Boca, where the first settlers landed, streets like the Caminito are lined with wooden houses painted in bright colors.

The modern city grew outward from the Plaza de Mayo, with the 18th-century Cabildo at its west end and the Casa Rosada at its east; the colonial Metropolitan Cathedral and the Central Bank also face the square, and the Pyramid of May (1811) at its center marks the first anniversary of the May 1810 revolution. Avenida de Mayo leads west to the National Congress, opposite the small square from which all distances on national highways are measured.

The obelisk of 1936, at the crossing of Avenida 9 de Julio and Avenida Corrientes, records four events on its four sides: the founding in 1536, the permanent settlement in 1580, the first raising of the Argentine flag on that spot in 1812, and the creation of the federal district there in 1880. The Colón Theatre (1908) hosts the national ballet and symphony. In La Boca, the Caminito's brightly painted wooden houses recall the first settlers and the 19th-century meat-salting plants; in Puerto Madero, former warehouses have become a smart district crossed by Santiago Calatrava's 102 m Puente de la Mujer.

Plaza de Mayo
historic square with the Casa Rosada (Government House)
Obelisk
inaugurated 1936
Colón Theatre
opera house, 1908
Puente de la Mujer
footbridge, 102 m long
Main facade of Teatro Colón
Photo: EEJCC, CC0 1.0, via Wikimedia Commons

A city founded twice

Buenos Aires was started two times!

The first town did not last. About 50 years later, people came back and built it again. Later, ships brought many families from Italy and Spain. The city grew and grew.

Spanish explorers led by Pedro de Mendoza first founded the city in 1536, but the settlement did not last and its people moved up the river to Asunción. In 1580 Juan de Garay came back and founded it again at the mouth of a small river, the Riachuelo.

For a long time Spain allowed little trade through Buenos Aires, but the city grew anyway through ranching and smuggling. In 1776 it became the capital of a new Spanish territory, and in May 1810 its town council broke away from Spanish rule. Argentina declared independence in 1816. From the late 1800s, many people from Spain and Italy arrived, the farmlands became rich, and the city was rebuilt with grand avenues.

Pedro de Mendoza's 1536 settlement, Nuestra Señora Santa María del Buen Aire, failed amid attacks by local Indigenous people and short supplies; its survivors withdrew to Asunción. Juan de Garay refounded the city in 1580 at the mouth of the Riachuelo. Under Spain's rule that only certain ports could trade, Buenos Aires was a backwater of the Viceroyalty of Peru, and a full exchange of goods with Spain via Lima's port took at least 24 months; the city lived on ranching and contraband. In 1776 it became capital of the new Viceroyalty of the Río de la Plata, and its population nearly doubled from 24,000 (1778) to 42,500 (1810).

Local militias repelled British invasions in 1806 and 1807. In May 1810 the town council broke with Spain, and on May 25 it backed a new ruling junta; the provinces declared independence at Tucumán in 1816. After decades of conflict between the port and the interior, the city became the federal capital in 1880. Immigrants, mainly from Spain and Italy, transformed it; for the 1910 centennial the elite remade it on the model of Haussmann's Paris, and Avenida 9 de Julio opened officially in October 1937. In 2001 a debt default brought economic collapse and protests; by 2004 the city's economy had recovered.

Through the years

Getting around Buenos Aires

Buenos Aires has small, busy buses called colectivos.

There is almost always one close by. Trains also zoom under the ground. Big ships come and go at the port.

Buenos Aires has the oldest subway in Latin America: its first line opened in 1913. Above ground, people ride the colectivo, a small bus invented in Argentina. Colectivos are everywhere, so you are rarely more than one block from a bus.

The city is also a giant port. Ships from all over the world bring machines and goods and leave with grain and food oils from Argentina's farms. Ezeiza International Airport lies outside the city, and Jorge Newbery Airport, inside the city, serves flights within Argentina and to nearby countries.

Britannica credits Buenos Aires with one of the world's better urban transportation systems, built around the colectivo, an Argentine-invented microbus about half the size of a city bus, often run by cooperatives of owner-drivers; riders are seldom more than a block from a bus. Its subway, Latin America's oldest, opened its first line in 1913; after privatization in the early 1990s stations were refurbished, and in 2007 the first new line since the 1940s opened.

In the second half of the 20th century, cars and colectivos replaced the trams and trains as the dominant modes, and the planned ring of expressways was never completed, so streets became saturated with traffic. The port, privatized in 1994, still has narrow access channels and long truck queues at harvest time. Ezeiza, the international airport, lies outside the city; Jorge Newbery, inside the federal district, serves domestic flights and those to neighboring countries.

Subway (Subte)
first line opened 1913
Colectivo (microbus)
an Argentine invention
Airports
Ezeiza (international) and Jorge Newbery (city)

Weather and seasons

In Buenos Aires, summer comes in December and January!

That is because the city is south of the equator. Summers are hot and sticky. Winters are mild, and snow almost never falls.

Buenos Aires is south of the equator, so its seasons are the opposite of North America's and Europe's. Summer, from December to March, is hot and humid: in January, highs average about 30 °C and lows about 20 °C. Winter, from June to September, is mild but damp, with July highs around 15 °C and lows around 7 °C.

Frosts can happen from May to September, but snow is extremely rare. About 1,140 millimeters of rain fall in a year, the most in March. Spring and autumn bring changeable weather, and thunderstorms are common between September and March.

Britannica describes the temperate climate of the Río de la Plata's coastal plain: hot, humid summers from December to March, mild but humid winters from June to September, fluctuating weather in spring and autumn, and an average annual temperature of about 16 °C. Frosts occur from May to September, but snowfall is extremely rare; winds are generally light and more frequent during the season of electrical storms, September to March.

World Meteorological Organization normals (1981–2010) give a January mean daily maximum of 30.1 °C and minimum of 20.1 °C, and a July maximum of 15.3 °C and minimum of 7.4 °C. Rainfall is spread through the year but peaks in March (about 140 mm); Britannica gives an annual average of about 1,140 mm.

January, average daily high and low
about 30 °C and 20 °C
July, average daily high and low
about 15 °C and 7 °C
Rain in a year
about 1,140 mm
Photo of Río de la Plata
Photo: Roberto Fiadone, CC BY-SA 4.0, via Wikimedia Commons

Living in Buenos Aires

People in Buenos Aires love soccer.

Neighborhoods cheer for their own teams. People dance the tango in parks and dance halls. Friends meet in cafés to chat.

The tango, a dance and music that began in the city's poorer neighborhoods, is now performed in dance halls, parks and squares, and the city celebrates the Day of the Tango every December 11. Soccer is the most popular team sport, and each neighborhood is loyal to its local club; the 1978 World Cup was held here. Polo, played on horseback, is also hugely popular.

Each neighborhood has its own cafés and meeting places. Many families have roots in Spain and Italy, and Italian food is popular. The Colón Theatre, museums of art and natural science, and big parks such as Palermo make the city a busy cultural center.

Britannica notes that porteños relish politics, football and the city's culture; tango, born in the lower-class districts and said to reflect the essence of the porteño soul, is danced in clubs, halls, parks and squares, with a Day of the Tango on December 11 and a June commemoration of the singer Carlos Gardel. Writers such as Jorge Luis Borges, Julio Cortázar, Ernesto Sábato and Silvina Ocampo made the city's landscape literary.

Most porteños descend from late 19th- and early 20th-century immigrants from Spain and Italy, with many smaller communities; since the 1930s most newcomers have come from northern Argentina, Bolivia and Paraguay. About four-fifths of Argentina's 250,000 Jews live in the city. Football is the most popular team sport (the 1978 World Cup was held here), polo has become the national sport, and pato, played on horseback, traces its origin to nomadic Pampean Indigenous peoples. Green spaces include the zoo, the botanical gardens and parks built on reclaimed floodlands.

Day of the Tango
December 11
World Cup
held in Buenos Aires in 1978
Palermo park
the city's oldest park

Buenos Aires on the map

Find Buenos Aires on the globe.

It is in Argentina, in South America. Look for the wide river mouth on the east coast. The city sits on its shore.

Buenos Aires is on the east coast of South America, in Argentina. It sits on the southwestern shore of the Río de la Plata, where the Paraná River's delta opens into a wide estuary that flows 240 kilometers to the Atlantic Ocean.

The land around the city is very flat. To the west and south stretch the Pampas, and to the north lies the delta, with its many islands, where porteños go on weekends.

Buenos Aires lies at about 34.6° S and 58.4° W, on the Río de la Plata where the Paraná delta widens into the estuary, 240 km from the Atlantic. The city center sits on a bluff overlooking the river; to the south flows the Riachuelo, whose banks form the other higher ground, and the rest of the city spreads over almost flat floodplains crossed by small rivers.

The federal district is bounded by the Riachuelo and Avenida General Paz (opened 1941). Beyond it lie industrial counties such as Avellaneda and Quilmes to the south and Tigre, in the Paraná delta, to the north, a weekend destination with many rowing clubs.

Latitude
about 34.6° south
Longitude
about 58.4° west
Distance to the Atlantic
240 km

Amazing facts

  • Buenos Aires means "good air."

    The first settlement was named Nuestra Señora Santa María del Buen Aire, "Our Lady St. Mary of the Good Air."

    Pedro de Mendoza named his 1536 settlement Nuestra Señora Santa María del Buen Aire; Juan de Garay called his 1580 refoundation Ciudad de Trinidad.

  • Distances on Argentina's highways are measured from Buenos Aires.

    All distances on Argentina's national highways are measured from a "kilometer zero" point across from the National Congress.

    The zero-kilometer point for all national highway distances is in the small square across from the National Congress, at the head of Avenida de Mayo.

  • Argentina's flag was raised for the first time where the Obelisk stands.

    The Obelisk stands where the Argentine flag was first raised, in a church tower, on August 23, 1812.

    The obelisk marks the site of the San Nicolás de Bari Church, in whose tower the Argentine flag was first hoisted on August 23, 1812; the federal district was proclaimed on the same site in 1880.

  • The colectivo bus was invented in Argentina.

    The colectivo, a small city bus about half the size of a normal one, is an Argentine invention.

    The colectivo, an Argentine-invented microbus half the size of a typical city bus, is usually run by a cooperative of its owner-drivers.

  • In Puerto Madero, the streets are named after women.

    In the Puerto Madero neighborhood, the streets are named after famous women, and a footbridge is called the Bridge of the Woman.

    Puerto Madero's streets are named after prominent women; Santiago Calatrava's 102 m Puente de la Mujer crosses the center of the district.

Words to know

capital
the city where a country's government meets
estuary
the wide mouth of a river, where fresh water mixes with the sea
port
a town with a harbor where ships load and unload
porteño
a person from Buenos Aires; it means "person of the port"
tango
a dance and music for couples that began in Buenos Aires
immigrant
a person who moves to live in a new country
obelisk
a tall, narrow, four-sided stone pillar with a pointed top

Discovery challenge

  1. Which dance began in Buenos Aires?

    Which dance and music began in the poorer neighborhoods of Buenos Aires?

    Which dance, said to reflect the soul of the porteño, has a city holiday on December 11?

    • The tango
    • The waltz
    • Ballet
    Show the answer

    The tango

    The tango! Two people dance it together.

    The tango, now danced in halls, parks and squares.

    The tango; December 11 is the Day of the Tango.

  2. How many times was Buenos Aires started?

    How many times was Buenos Aires founded?

    Buenos Aires was founded by Mendoza in 1536 and refounded by Garay in 1580. How many foundings is that?

    • Once
    • Twice
    • Five times
    Show the answer

    Twice

    Twice! The first town did not last, so people built it again.

    Twice: in 1536 and again in 1580.

    Two: the 1536 settlement failed and was abandoned; Garay's 1580 city endured.

  3. What color is the president's building?

    What does Casa Rosada, the name of the Government House, mean?

    The Government House at the east end of the Plaza de Mayo is commonly called the Casa Rosada. What does that mean?

    • Pink House
    • White House
    • Golden House
    Show the answer

    Pink House

    Pink! It is called the Pink House.

    Pink House. It faces the Plaza de Mayo.

    Pink House; from its balcony Argentina's leaders have addressed the country.

  4. Which river is Buenos Aires beside?

    Buenos Aires sits on the shore of which wide estuary?

    Into which estuary does the Paraná delta widen at Buenos Aires?

    • The Río de la Plata
    • The Amazon
    • The Mississippi
    Show the answer

    The Río de la Plata

    The Río de la Plata! It is very wide.

    The Río de la Plata, 240 kilometers from the Atlantic Ocean.

    The Río de la Plata, which defines the eastern and northern limits of the metropolitan area.

  5. What is a colectivo?

    What is a colectivo in Buenos Aires?

    What Argentine invention is at the heart of Buenos Aires's public transportation?

    • A small bus
    • A boat
    • A bicycle
    Show the answer

    A small bus

    A small, busy bus!

    A small bus, invented in Argentina, about half the size of a normal city bus.

    The colectivo, or microbus; riders are seldom more than a block from one.

Nearby places

Explore next

For parents & teachers

What children will learn

  • Locate Buenos Aires on the Río de la Plata in Argentina.
  • Explain why Buenos Aires was founded twice.
  • Describe how immigration from Europe shaped the city.
  • Explain why seasons in Buenos Aires are opposite to those in North America.

Recommended ages: 3 to 17 · About 15 minutes

Talk about it

  • People from Buenos Aires are called 'people of the port.' What name would describe people from your town?
  • Many families in Buenos Aires came from Italy and Spain. How do people who move bring their food, music and words with them?
  • Each neighborhood in Buenos Aires has its own café and soccer team. What makes your neighborhood special?

Try at home or in class

  • Listen to some tango music and clap the strong beat. Try a simple walking step with a partner.
  • Paint a cardboard box house in bright La Boca colors, with a different color for each wall.

Key vocabulary: capital, estuary, port, porteño, tango, immigrant, obelisk

Where these facts come from

  1. Wikidata , Wikimedia Foundation (CC0 1.0)
  2. Natural Earth vector data , Natural Earth (NACIS) (Public domain)
  3. Buenos Aires , Encyclopaedia Britannica
  4. Buenos Aires: Climate (and city layout) , Encyclopaedia Britannica
  5. Buenos Aires: City neighborhoods , Encyclopaedia Britannica
  6. Buenos Aires: Economy , Encyclopaedia Britannica
  7. Buenos Aires: The arts , Encyclopaedia Britannica
  8. Buenos Aires: History , Encyclopaedia Britannica
  9. Buenos Aires: The independent capital , Encyclopaedia Britannica
  10. Buenos Aires: The modern city , Encyclopaedia Britannica
  11. Buenos Aires: climatological information , World Meteorological Organization, World Weather Information Service
  12. Wikimedia Commons , Wikimedia Foundation (Per file (public domain, CC0, CC BY or CC BY-SA); see each media record)

Checked, not yet human-reviewed. Last updated October 27, 2026. Spotted a mistake? Tell us.

Picture credits
  • Photo: ProtoplasmaKid, CC BY-SA 4.0, via Wikimedia Commons · source · license
  • Photo: EEJCC, CC0 1.0, via Wikimedia Commons · source · license
  • Photo: Roberto Fiadone, CC BY-SA 4.0, via Wikimedia Commons · source · license