441 million people, on a continent nearing its peak

South America is home to about 441.9 million people, spread across a dozen countries running from the Caribbean coast of Colombia down to the tip of Patagonia¹.

The growth here is winding down fast. The UN’s medium-variant projection has the continent adding fewer than 30 million people over the next 24 years, reaching roughly 468.7 million by 2050, likely close to an all-time high, with a slow decline expected not long after¹.

Aging faster than it’s growing

Fertility across the continent has fallen to 1.7 children per woman, below the 2.1 needed to hold a population steady over time, and it’s still dropping¹.

The median age is climbing in step. It sits at 32.7 today and is projected to reach 42 by 2050, nearly a decade older in a single generation¹. Annual growth, which was still above half a percent as recently as 2024, is on track to all but disappear by mid-century¹.

That combination, a median age jumping nearly a decade while growth flattens out, is the same shape aging economies like Japan and much of Europe went through first: fewer young workers supporting more retirees. The difference is timing. South America is heading into it well before it’s reached anything like Japanese or European income levels to cushion the transition.

A continent of cities and a few very large countries

South America is more urbanized than almost anywhere else on Earth. 88% of its people already live in cities, and that share is projected to climb past 96% by 2050¹.

The population is also heavily concentrated. Brazil alone is home to nearly half the continent’s people:

Colombia comes next at around 52 million, then Argentina at 46 million, Peru at 34 million, and Venezuela at 28 million². Put the two facts together and most of what happens to South America’s population over the next few decades will really happen inside a fairly small number of cities in a fairly small number of countries.

The mountain range that built a continent

The Andes run roughly 5,500 miles down the entire western edge of the continent, the longest continental mountain chain on Earth, crossing seven countries from Venezuela to Argentina and carrying the hemisphere’s highest peaks along the way³.

The range also feeds the continent it divides. Snowmelt and rainfall from the Andes feed some of the world’s largest rivers, including the Amazon’s own headwaters, the Magdalena, and the Orinoco, water that tens of millions of people downstream rely on for drinking, farming, and electricity³.

High in those same mountains, in the salt flats where Argentina, Bolivia, and Chile meet, sits something else the rest of the world increasingly wants: lithium. This “Lithium Triangle” holds an estimated 58% of the world’s known lithium resources, the key ingredient in the batteries behind the global shift to electric vehicles⁴. It’s a strange kind of leverage: a continent whose own population and footprint sit close to the world average holds one of the raw materials the rest of the world’s climate transition can’t do without.

A middle class that grew faster than almost anywhere else

Between 2001 and 2011, the share of South Americans living a middle-income lifestyle jumped from 16% to 27% of the population, an 11-point swing in just one decade. Poverty fell just as sharply over the same years, from 17% down to 7%⁸.

That shift hasn’t stopped. Across the wider Latin America and Caribbean region (a larger area than South America alone, spanning Central America and the Caribbean too), around 400 million people, 61% of the region, are now considered middle class, with more than $5 trillion a year in spending power projected to approach $7 trillion by 2035⁹. More people are spending more, and the continent’s footprint (below) is only just starting to reflect it. The gains are also uneven and fragile: many of the households that climbed into the middle class over the past two decades still lack the job security that would let them stay there⁹.

What 441 million people cost the planet

If everyone in the world lived like the average South American, humanity would need 1.61 Earths to keep up, a touch below where the world already sits today¹². There’s a real tension in that number: a continent that supplies much of the world’s beef, soy, copper, and lithium still carries a lighter per-person footprint than the global average.

Carbon is the single largest share of that footprint, at around a third¹². That’s a fossil-fuel story, not a deforestation one: the CO2 comes from burning oil and gas, not from clearing land. Oil still meets 48% of the wider region’s energy demand today⁶, and Venezuela’s oil and gas sector is an outsized part of the carbon picture on its own, with methane emissions six times the global average for the industry and gas-flaring intensity ten times the global average⁷.

Grazing land and cropland are the next two drivers, and this part is a land-use story. Cattle ranching is the leading direct driver of deforestation across the continent, and cleared pastureland often has a second life: sold on a few years later for the more lucrative business of growing soy, which pushes the ranching frontier further into what forest remains⁵. It’s the same pressure eating into Brazil’s own share of the Amazon, playing out continent-wide, and worth tracking through the rate of deforestation.

South America’s own land produces roughly 2.7 times the biocapacity its population actually uses domestically¹², a natural surplus the continent draws down a little further every year it keeps exporting resources to the rest of the world.

Already ahead on the one number that matters most

Set against that carbon driver, there’s a real, measurable bright spot most of the world hasn’t caught up to yet. Latin America and the Caribbean now generate around 65% of their electricity from clean sources¹¹, roughly double the 34% the world manages as a whole¹⁰. Hydropower does most of the work, but solar capacity is still expanding, roughly 5% every month¹¹.