The world has more than 8 billion people

About 8.32 billion people are alive right now. The United Nations put the figure at 8,266,245,291 on 1 January 2026¹, and it has been rising by a little over two people every second since.

Nobody counts the world in real time, so the number is a model. The UN builds it from 1,910 censuses, 3,189 surveys and registers of births and deaths³, and everything after 1 January 2024 is its projection¹.

Other demographers get slightly different totals for the same world. The US Census Bureau’s country figures add up to about 1.3% fewer people, a gap of some 108 million, which is more than a year and a half of the world’s growth⁸.

World population grows by about 189,000 people a day

The world is adding a massive 69 million people in 2026, a growth rate of 0.83% a year¹. That works out at about 189,000 more people every day: roughly 363,000 births, less 174,000 deaths.

Both the pace and the numbers used to be higher. Growth was fastest in 1963, at 2.28% a year, and the biggest one-year increase came in 1990, when the world gained 93.7 million people. The number kept rising for 27 years after the rate peaked, because a smaller percentage was being taken of a much bigger population.

The yearly increase has shrunk by about a quarter since 1990, and the UN expects it to fall to about 41 million by 2050¹.

World population passed 8 billion in 2022

The world passed 8 billion people in 2022. The UN marked the day on 15 November that year⁵, though its latest figures, revised upward since, put the crossing in the first half of 2022¹.

It took all of human history until 1804 to reach the first billion, and another 123 years to reach the second⁶. The eighth billion took twelve. The ninth is expected to take fifteen, the longest wait since the third.

The first two dates are historical estimates from a UN report of 1999, which is also where 1987 comes from: the UN’s current series passes 5 billion in the last days of 1986. The other dates are from the current series, which puts 6 billion in 1998, a year earlier than the UN marked it at the time⁶¹.

About one in fourteen of all the people ever born is alive today. The Population Reference Bureau, a US research group, estimates that about 117 billion people have ever lived, which makes the living about 7% of the total¹⁰.

World births have peaked, but momentum will add 1.4 billion more people

World population growth is slowing because women are having far fewer children: 2.25 on average in 2024, down from 3.31 in 1990³. Researchers tie the fall to girls staying longer in school and wider access to contraception¹². The number of babies born each year has already peaked, at 146 million in 2012¹.

That average is now close to what demographers call replacement level: about 2.1 births per woman, the point at which each generation is followed by one of the same size³. Yet the total keeps climbing, and the world still records about two births for every death. The reason is momentum.

Past growth has left the world with a young population, so there are more people of parenting age than ever. Nearly 2 billion women are of childbearing age, a number still rising toward 2.2 billion in the late 2050s. Even at about two children each, that many parents means a great many births. The UN expects this momentum to account for 79% of all growth to 2054, around 1.4 billion people³.

People are also living longer, so each generation stays in the count for longer. Life expectancy at birth reached 73.3 years in 2024, up 8.4 years since 1995, and is projected to pass 77 by 2054³.

What finally slows the total is deaths catching up, as the large generations born in the twentieth century grow old. Deaths are projected to rise from 64 million in 2026 to 92 million in 2050, and to overtake births around 2084¹.

9.6 billion people by 2050, most of the growth in a few countries

The world will have about 9.6 billion people in 2050, according to the UN’s medium projection, the middle path in its range of scenarios: 9,644,036,216 on 1 January that year¹. The UN gives an 80% chance that the real figure lands between 9.5 and 9.8 billion². The range is narrow largely because most of the people who will be alive in 2050 already are.

The growth is very unevenly spread. By our arithmetic on the UN’s figures, seven countries account for just over half of the net increase between 2026 and 2050: India, Nigeria, Pakistan, the Democratic Republic of the Congo, Ethiopia, Tanzania and Egypt. Sub-Saharan Africa as a whole adds 788 million people, 57% of the world’s net gain, while China shrinks by 149 million¹.

Much of the world is already past its peak. In 63 countries and areas holding 28% of the world’s people, including China, Germany, Japan and Russia, the population has stopped growing. Two thirds of humanity now lives somewhere with fertility below replacement level³.

World population is set to peak near 10.3 billion in the 2080s

The UN expects world population to peak at about 10.3 billion in the mid-2080s and then decline slowly, to 10.2 billion by 2100³. In its medium projection the high point is 10.29 billion, in 2084¹. On the way there the world passes 10 billion, a milestone with its own page.

That forecast has come down fast. A decade ago the UN gave about a 30% chance that the population would peak this century. Now it gives 80%, and its figure for 2100 is 700 million lower than it expected then. The main reason is that fertility has fallen faster than expected in some of the largest countries, particularly China³.

Other forecasters put the peak sooner or later. The Wittgenstein Centre in Vienna has it at 10.13 billion in 2080¹¹, and the US Census Bureau at 10.6 billion in 2092⁹. A much lower forecast, made in 2020 by the Institute for Health Metrics and Evaluation (IHME) in Seattle, was 9.73 billion as early as 2064¹².

They differ mainly on what happens in countries where women already have fewer than two children. The UN assumes fertility there recovers slightly. IHME, which forecasts fertility from girls’ schooling and access to contraception, expects no recovery¹².

By 2100 even the UN’s own range is wide: a 95% chance of somewhere between 9.1 and 11.4 billion².

Ageing and shrinking populations put economies under pressure

Slower growth, and in many countries outright decline, brings problems of its own, because the population grows older. By our count on the UN’s figures, about one person in ten was 65 or older in 2026. By 2050 it will be one in six, and by 2100 nearly one in four¹⁹. People over 65 are projected to outnumber children under 18 by the late 2070s³.

That changes who supports whom. By the same count, for every person over 65 the world now has about five and a half people aged 20 to 64, and by 2050 it will have three and a half¹⁹. In some countries the decline is under way or close: China is projected to lose 204 million people between 2024 and 2054 and more than half of its current population by 2100, and Japan 21 million by 2054³.

Economists see real costs. The International Monetary Fund (IMF) models 69 economies that make up about two-thirds of world output, and under current policies it projects growth over 2025 to 2050 about 1.1 percentage points a year below its 2016 to 2018 level, with demographic change accounting for almost three quarters of that. About half of the economies it models, including China, Japan and the United States, would need tighter budgets to keep their debt stable²⁰. Some economists go further. The economist Charles Jones has argued that in standard growth models, where new ideas come from people, “living standards stagnate for a population that vanishes”²³.

The other side of the argument is that most of this can be managed. People are ageing in better health: across 41 economies the IMF found that a 70-year-old in 2022 had, on average, the same cognitive ability as a 53-year-old in 2000, which it sums up as “the 70s are the new 50s”. In its model, healthier ageing already adds about 0.4 percentage points a year to world growth. On top of that, a policy scenario of retirement ages rising with life expectancy, more women in work and policies that keep people healthy into their sixties could offset almost three quarters of the demographic drag²⁰. The OECD’s own scenario cushions 70% of the slowdown in growth per person in its member countries²¹. And in the IMF’s model, growth per person slows by about half as much as total growth²⁰.

What the evidence does not support is the idea that migration or family policies will reverse the trend. The UN says migration alone cannot offset population decline or ageing in the long term³, and the OECD that family policies may help contain the fall in birth rates but are unlikely to reverse it²¹. The UN Population Fund (UNFPA) warns against alarm about “too many” and “too few” people alike, saying such anxiety distracts “from serious but solvable problems”²⁴.

Twice as many people as in 1970, with the same average footprint

The average person’s demand on the planet has hardly changed in half a century: 2.62 global hectares in 1970 and 2.56 in 2023¹³. A global hectare is a hectare of land or sea of average productivity, and the measure adds up the cropland, forest, fishing grounds and carbon-absorbing land it takes to supply one person. The accounts are published by Global Footprint Network, a research group.

Over the same years the population more than doubled, from 3.7 to 8.1 billion¹. Humanity’s total demand went from 0.96 Earths, just inside what the planet can regenerate in a year, to 1.71¹³.

Greenhouse gases follow the same pattern. Emissions per person barely moved between 1990 and 2019, from 7.7 to 7.8 tonnes of CO2-equivalent (all greenhouse gases, counted by their warming effect), while total emissions rose 54%¹⁵.

The average held steady because two forces cancelled out. From 2010 to 2019, rising incomes pushed CO2 emissions from fossil fuels up by 2.3% a year, while more efficient use of energy pulled them down by about 2%. Population growth added another 1.2% a year on top. The Intergovernmental Panel on Climate Change (IPCC) found income per person to be by far the strongest driver, and population growth a strong and persistent one as well¹⁶.

The long argument over population and the environment turns on which of those to stress. In 2017 more than 15,000 scientists signed a warning that named “continued rapid population growth” as “a primary driver behind many ecological and even societal threats”, next to “uneven material consumption”¹⁸. The UN’s own demographers put the weight on consumption.

Nor does the average show who does the consuming. The richest 10% of people were responsible for 48% of the world’s emissions in 2019, and the poorest half for 12%¹⁷.

About half of all population growth to 2050 will happen in the world’s least developed countries¹. In 2019 the average person there emitted 1.7 tonnes of CO2-equivalent, against a world average of 6.9, both leaving out emissions from land use¹⁵. In the IPCC’s reading, a modest population increase in wealthy countries may have a similar effect on emissions as a large one in regions where emissions per person are low¹⁶.

Humanity now uses 1.7 Earths

The planet now needs about a year and eight months to regenerate what humanity uses in a year. In the accounts’ own unit, that is 1.71 Earths¹³.

The supply per person has more than halved as the number of people has grown. In 1961 there were 3.17 global hectares of productive land and sea for each person on Earth. By 2023 there were 1.50, against a footprint of 2.56¹³.

Carbon is the biggest part by far. The forest it would take to absorb humanity’s carbon dioxide from coal, oil and gas makes up 60% of the footprint, and by itself comes to 1.03 Earths, more than the whole planet can regenerate¹³.

On the calendar, that puts Earth Overshoot Day, the date by which humanity has used a full year of the planet’s regeneration, on 30 July in 2026¹⁴. The longer account is on the page for how many Earths humanity uses.

Per person, the carbon footprint has started to shrink: it peaked in 2011 and was about 7% lower by 2023. But the population grew faster than that. Total demand reached a record 1.71 Earths in 2022 and matched it in 2023, the last year with complete accounts¹³, and Global Footprint Network says 2026 “still represents the highest level of ecological overshoot ever recorded”¹⁴.

A lower population peak will not shrink humanity’s footprint on its own

If the average footprint stayed where it is today while the population grew to the 9.6 billion expected in 2050, humanity’s demand would rise to roughly two Earths. That is a rough calculation, not a forecast, and it assumes the planet’s own capacity stays as it is.

Since 1970 the total has grown about as fast as the head count, because the average stood still. That does not make population the cause. Judging by the IPCC’s figures for the 2010s, the average held only because gains in efficiency were spent on rising incomes. With population growth now slowing toward a peak, it is likely to be the average that decides what happens next.

The average could move either way. The carbon part of the footprint would fall as coal, oil and gas are replaced. It would rise as the countries where populations are growing fastest use more energy, which the UN says they will need to do³.

Seen from the planet’s side, the UN calls a lower peak a hopeful sign. Seen from a pension system’s side, an older population is a cost that has to be managed²⁰.

Where the world’s people live, and how each region is changing, is on the pages for Africa, Asia, Europe, North America, South America and Oceania.