Population by Country (2024)

World Population by Country

The world's population has grown from 2.5 billion in 1950 to over 8 billion today, one of the most dramatic transformations in human history. However, this growth is profoundly uneven. India surpassed China as the world's most populous country in 2023, a milestone driven by China's decades-old one-child policy and India's younger demographic profile. Together, these two nations account for more than a third of all people on Earth. The top 10 most populous countries — including the United States, Indonesia, Pakistan, Brazil, Nigeria, Bangladesh, Russia, and Mexico — contain roughly 60% of the global population.

Global population growth has decelerated sharply, from over 2% annually in the 1960s to approximately 0.8% today. The UN projects the world will reach about 10.4 billion by the 2080s before beginning a gradual decline. The drivers of this slowdown are universal: rising female education, urbanization, access to contraception, and the economic transition from agriculture to services all reduce fertility rates. Sub-Saharan Africa remains the fastest-growing region, with countries like Niger, Chad, and the Democratic Republic of Congo growing at 3% per year — doubling every 23 years.

Population size alone doesn't determine economic power. The critical factors are age structure, productivity, and human capital. Countries with large working-age populations relative to dependents (children and elderly) enjoy a "demographic dividend" that can turbocharge growth — this is the opportunity facing India, Indonesia, and parts of Africa. Countries with aging, shrinking populations — Japan, South Korea, much of Europe — face the opposite challenge: fewer workers supporting more retirees. For a deeper view of demographic trends, see our world population overview and life expectancy rankings.