World Population Trends: Growth, Decline, and Projections for 2050

Growth, decline, and the changing global population map

The central demographic trend is not simply continued global growth. Countries are moving through the demographic transition at very different speeds. Some populations have already reached their maximum size, another group is projected to peak within the next three decades, and many countries—especially in parts of Africa and Asia—are expected to continue growing well beyond mid-century.

UN WPP 2024 population-trajectory groups

These three groups and counts are published in World Population Prospects 2024: Summary of Results. They classify locations by the timing of their observed or projected population peak; they are not rankings of demographic performance.

The distinction explains how world population can keep increasing while major countries shrink. Growth in countries with youthful age structures can outweigh population losses elsewhere. The UN also identifies demographic momentum—the age structure created by earlier population growth—as the main driver of the global increase through mid-century.

China, Japan and the Russian Federation illustrate one side of this divergence: each remains a large population while belonging to the UN group that had already peaked by 2024. India, Indonesia, Nigeria, Pakistan and the United States belong to the group expected to continue growing through 2054. Brazil, Iran, Türkiye and Viet Nam fall into the intermediate group projected to peak between 2025 and 2054.

Top 10 countries by projected population in 2050

India and China remain in a distinct population tier in 2050. The next group is led by the United States, Pakistan and Nigeria, while Ethiopia and the Democratic Republic of the Congo both exceed 200 million people in the UN median projection.

Top 10 projected national populations in 2050 · UN WPP 2024 median projection

Values are rounded only for display. Ranking is based on the underlying 2050 population value in persons, descending.

Methodology

The ranking uses the United Nations World Population Prospects 2024 median projection for total population at mid-year 2050, both sexes combined. Countries are sorted from the largest raw projected population to the smallest.

No synthetic 2050 country population is calculated on this page. There is therefore no calculated_value or modeled_projection formula for ranking rows. The bars in the chart use a display-only proportional width based on each country's raw 2050 value relative to the largest value; this does not alter the ranking.

Population size should not be interpreted as population growth rate, fertility, migration, population density, median age, labor-force size, economic output or living standards. A country can rank high by population while already being in demographic decline.

2050 population ranking: Top 20 countries

This table is a size reference within the broader demographic-trends analysis. Use the controls to search countries, filter by region or status, change sort order, or narrow the view to the Top 10.

Top 20 countries by projected mid-year population in 2050

20 confirmed rows.

Source snapshot: United Nations DESA Population Division, World Population Prospects 2024, median projection, total mid-year population by sex, both sexes. Data checked September 24, 2026. Values are rounded only after ranking.

Four findings from the 2050 outlook

What the 2050 projection means

The Top 20 table answers one narrow question: which countries are projected to have the largest populations in 2050. It does not identify the fastest-growing countries. A large country can be declining, while a much smaller country can have a higher growth rate.

The broader UN trajectory groups are therefore essential for interpretation. They show that global population growth and national population decline can occur simultaneously. They also make clear why a single global total cannot describe demographic conditions in every region.

Future population size is also not a complete measure of demographic pressure or economic potential. Age structure, labor-force participation, migration, education, productivity, urban capacity and dependency ratios can differ substantially between countries with similar population totals.

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