Argentina is by far the bigger and more populous country, but Uruguay is richer per person. Argentina covers 2,780,085 km², nearly 16 times Uruguay’s 176,215 km², and counted 46.0 million people in its 2022 census against Uruguay’s 3.5 million in 2023. Yet on IMF estimates for 2026, Uruguay’s GDP per capita is about US$27,600, close to double Argentina’s US$14,400. Argentina’s capital is Buenos Aires and Uruguay’s is Montevideo; the two cities face each other across the Río de la Plata estuary, and both countries speak Spanish, in the same Rioplatense variety. Below, the comparison is broken into the questions people most often ask, each answered with figures.
Which Is Bigger, Argentina or Uruguay?
Argentina, by a wide margin. At 2,780,085 km² it is the second-largest country in South America after Brazil and the eighth-largest in the world, and that figure excludes its claims to the Falkland Islands, South Georgia and a sector of Antarctica, all administered by the United Kingdom or frozen under the Antarctic Treaty. Uruguay, at 176,215 km², is the second-smallest country in South America after Suriname; it would fit into the Argentine province of Buenos Aires, which alone covers about 307,000 km².
The shapes differ as much as the sizes. Argentina stretches from the subtropical Chaco and the waterfalls of Iguazú in the north to Tierra del Fuego in the south, taking in the Andes, the grassland of the Pampas and the dry steppe of Patagonia. Uruguay is almost entirely rolling grassland and low hills, drained by the Río Negro, with an Atlantic coastline to the southeast. The two meet along a 579 km border that follows the Uruguay River from the tripoint with Brazil at the mouth of the Quaraí down to the river’s confluence with the Paraná, where the Río de la Plata begins.
Which Has More People, and Why Do Both Crowd the Río de la Plata?
Argentina has about 13 times as many people: 46,044,703 at the 2022 census against 3,499,451 at Uruguay’s 2023 census. Density is another matter. Divide population by area and Argentina has about 16.6 people per km² while Uruguay has about 19.9, so the smaller country is, on average, the slightly more crowded one.
In both countries, people cluster on the estuary. Nearly 2 million Uruguayans, well over half the population, live in the metropolitan area of Montevideo. Greater Buenos Aires, the capital city plus the surrounding partidos (counties) of Buenos Aires province, holds about a third of all Argentines and generates nearly half the national GDP. Both populations are overwhelmingly of European descent, shaped by the same late 19th- and early 20th-century waves of Spanish and Italian immigration, and each country hosts sizeable communities from the other. Spanish is Argentina’s language in practice; Uruguay, unusually, has no de jure official language, though Spanish is universal.
The estuary itself is the link. The Río de la Plata is about 290 km long and widens from about 2 km at its source to about 220 km at its mouth, which makes it the widest river in the world if it is counted as a river at all. About 2.5 million people a year cross it, most commonly between Buenos Aires and Colonia del Sacramento, a town the Portuguese founded in 1680 to challenge Spanish control of the river and whose historic quarter is now a UNESCO World Heritage Site.
Which Is Richer: Argentina or Uruguay?
Per person, Uruguay. The IMF’s 2026 estimates put Uruguay’s nominal GDP per capita at about US$27,608 and Argentina’s at about US$14,357. Adjusted for purchasing power the gap narrows but remains, at about US$39,030 against US$33,187. In total output, Argentina is much larger, with a GDP of about US$688 billion compared with Uruguay’s US$96 billion.
The difference is less about resources than about stability. Both economies were built on cattle and grain from the same grasslands; in 2007 Uruguay had about 12 million cattle, the most per person of any country, and beef is its main export. Argentina has lived through repeated debt crises, including the 2001 default and a restructuring of about US$100 billion of loans between 2005 and 2010, and bouts of very high inflation: 211% over 2023, easing to about 118% over 2024. Uruguay has had steadier public finances and has rebuilt its power supply around renewables: in 2023 about 98% of its electricity came from renewable sources, chiefly hydropower and wind. On the UN Human Development Index, though, the two are almost level, at 0.865 for Argentina and 0.862 for Uruguay in 2023.
Which Is Higher: Aconcagua or Cerro Catedral?
There is no contest. Argentina contains the highest point in both the Southern and Western hemispheres, Aconcagua in Mendoza province, measured at between about 6,960 m and 6,967 m (22,830–22,860 ft) depending on the survey. It is the highest mountain outside Asia and one of the Seven Summits. Argentina also holds the lowest point in the Americas, Laguna del Carbón in Santa Cruz province, at 105 m (344 ft) below sea level.
Uruguay’s highest point, Cerro Catedral in the Sierra Carapé hills of Maldonado department, reaches just 514 m (1,686 ft), less than a thirteenth of Aconcagua’s height. The lack of mountains affects the weather too: with no ranges to act as barriers, fronts and storms sweep across Uruguay quickly, and winds off the Atlantic temper its summers. Argentina’s climate runs from subtropical in Misiones to subpolar in Tierra del Fuego.
Which Became Independent First, Argentina in 1816 or Uruguay in 1828?
Argentina, by twelve years, and Uruguay’s independence came partly out of a war fought with Argentine help. Both territories belonged to the Spanish Viceroyalty of the Río de la Plata, governed from Buenos Aires; present-day Uruguay was its Banda Oriental, the “eastern bank” of the Uruguay River. After the May Revolution of 1810 in Buenos Aires, the Congress of Tucumán declared Argentine independence on 9 July 1816.
The rivalry between the two ports is older than either country. Buenos Aires was first founded by Pedro de Mendoza on 2 February 1536 and permanently resettled by Juan de Garay on 11 June 1580; Montevideo was founded by the Spanish only in 1726, as a military stronghold against the Portuguese at Colonia. Its deep natural harbour soon competed with Buenos Aires for the river’s trade. Both cities were attacked during the British invasions of the Río de la Plata in 1806 and 1807, and British forces held Montevideo from February to September 1807. The first invasion, which captured Buenos Aires in 1806, was defeated by Santiago de Liniers, who had gone to Montevideo to gather support and returned with a force that included the Montevideo militia, a reminder that the two ports were partners as often as rivals.
The eastern bank took a longer route. José Gervasio Artigas beat the Spanish at Las Piedras on 18 May 1811, then broke with Buenos Aires; Portuguese troops from Brazil took Montevideo in January 1817 and, after nearly four more years of fighting, annexed the territory as the province of Cisplatina. On 19 April 1825 the Thirty-Three Orientals, led by Juan Antonio Lavalleja and backed by the United Provinces of the Río de la Plata, crossed the Uruguay River from the Argentine side, and on 25 August 1825 an assembly at Florida declared the Banda Oriental independent of Brazil and joined to the United Provinces. Brazil declared war that December, starting the Cisplatine War. Neither side won, and on 27 August 1828 a peace convention mediated by Britain’s envoy Lord John Ponsonby, often called the Treaty of Montevideo, made Uruguay an independent state between its two large neighbours.
Who Won the Pulp Mill Dispute on the Uruguay River?
Relations since independence have been close but not always calm. The 1973 boundary treaty settled the division of the river and estuary. From 2005 to 2010 the countries were locked in a dispute over a Finnish-built pulp mill at Fray Bentos, across the Uruguay River from the Argentine town of Gualeguaychú, about 35 km away. The International Court of Justice ruled in 2010 that Uruguay had failed to notify Argentina but had not polluted the river, and the two set up joint monitoring. They also share infrastructure, notably the Salto Grande Dam between Concordia and Salto, completed in 1979, and both were founding members of Mercosur under the 1991 Treaty of Asunción.
Which Has the Better World Cup Record, Argentina or Uruguay?
On the football pitch the smaller country struck first. Uruguay won the Olympic football tournaments of 1924 and 1928, hosted the first World Cup in 1930 and beat Argentina 4–2 in the final at the Estadio Centenario in Montevideo on 30 July 1930. It won again in Brazil in 1950. Argentina has since overtaken it with three titles, in 1978, 1986 and 2022, to Uruguay’s two. The place of football in Uruguayan life reflects that early start.
Who Owns the Tango, Buenos Aires or Montevideo?
The tango, the other great cultural export of the Río de la Plata, is formally shared. It developed in the port districts of both Buenos Aires and Montevideo, and on 31 August 2009 UNESCO approved a joint Argentine–Uruguayan proposal to add it to the Intangible Cultural Heritage lists. The same could be said of mate, the asado and the accent: much of what outsiders call Argentine is in fact Rioplatense, common to both banks.
So the short answers are: Argentina is bigger, more populous, higher and older as a state, with the larger economy and the extra World Cup; Uruguay is richer per head, slightly denser, more stable and powered almost entirely by renewables. To compare the two capitals in more detail, read our guides to Buenos Aires and to Montevideo, the capital on the eastern bank.