When Will World Population Peak? What the Projections Say

Based on UN World Population Prospects

World population is still growing — but slower every year, and that trend is decades old, not new. The question demographers actually debate isn't whether growth will stop, but roughly when global population will peak and begin to decline.

Growth has been slowing since 1963

It's a common assumption that population growth is accelerating out of control. The data says the opposite: the global growth rate peaked at roughly 2.3% per year in 1963 and has been falling more or less continuously since, down to under 0.9% today. World population is still increasing in absolute terms — adding roughly 70–80 million people a year — because 0.9% of 8 billion is still a large number. But the rate of growth has been cut by more than half over the past 60 years.

The UN's projection: a peak in the 2080s

According to the UN Population Division's World Population Prospects, the median projection has global population peaking at somewhere around 10.3 billion in the mid-2080s, before beginning a slow decline. That's a projection, not a certainty — it depends heavily on how fertility rates evolve in countries that are currently still growing quickly, particularly in sub-Saharan Africa — but it's the current best estimate from the standard reference source demographers use.

Countries where population has already peaked

The global figure is an average masking very different realities by country. Several major economies are already past their own population peak and shrinking today:

• Japan — population has been declining since around 2010, with one of the world's highest median ages
• Italy and much of Eastern Europe — birth rates well below replacement level for decades
• South Korea — the lowest fertility rate of any large country in the world
• China — began shrinking in the early 2020s after decades of below-replacement fertility, following the legacy of its one-child policy

You can watch this directly: select Japan or South Korea in World Pulse's country dropdown and the growth rate reads negative — the death rate has overtaken the birth rate.

The demographic transition, in one paragraph

The pattern behind all of this is called the demographic transition: as countries develop, death rates fall first (healthcare, sanitation, nutrition), followed a generation or two later by falling birth rates (urbanization, education — especially for women — and access to family planning). Nearly every country goes through this transition eventually; they're just at different points on the curve. Sub-Saharan Africa, still early in the transition, is where nearly all remaining global growth will come from over the next 50 years. Most of the rest of the world is already at or approaching the end of it.