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The World’s Most Populated Countries: India to Pass China in 2023

China and India rank as the two most populated countries in the world. But the world’s fastest-growing populations are in sub-Saharan Africa.

most populated countries
China and India are the world's most populated countries. But sub-Saharan Africa is home to the world's fastest-growing populations.

China is the world’s most populous country — but it won’t be for long. India is expected to overtake China in 2023 at the top of the list of the world’s most populated countries, according to a newly released forecast by the United Nations (UN).

But China’s aging and soon-to-be shrinking population is not the only important demographic trend in the coming decades. The world’s fastest-growing region is sub-Saharan Africa. Its surging population can provide a demographic dividend or severely strain governmental and natural resources, entrenching poverty, and fueling conflict.

How Many People Are In the World?

The world population in 2022 is an estimated 7.95 billion, according to the UN. And roughly thirty-six percent of the world’s inhabitants reside in the two most populous countries, China and India. Asia is the world’s most populous continent by far. Ten of the world’s twenty most populated countries are in Asia, which is home to over fifty percent of mankind.

Demographics and the China-India Rivalry

India’s population growth rate is three times faster than that of China. And while India’s fertility rate of 2.1 percent is right at replacement level — the birth rate required for a population to remain the same over a generation — China’s is below replacement, at 1.7 percent. In the coming decades, China’s population will not only get older, but it will also shrink. China’s population in 2050 is projected to fall to 1.36 billion, while India’s is forecast to rise to 1.66 billion.

China India population comparison overtakes passes
India will surpass China next year as the world’s most populated country.

As the rivalry between these two Asian giants grows, demography could shape the balance of power between the two countries. But a bigger population doesn’t necessarily mean that a country is stronger.

Militarily, China is seeking a leaner, more effective fighting force, bolstered by electronic warfare and other advanced technologies. In recent clashes with India, this technological superiority has given China the edge. India also faces a future in which jobs growth trails behind population growth. Its manufacturing industry is lackluster compared to China and even many smaller southeast Asian countries.

China’s future also isn’t so rosy. As growth slows and its population ages, China could fail to make the leap to a high-income country and get stuck in what’s called the “middle-income trap.” Still, from the 1980s until recently, China was able to leverage earlier demographic booms and develop an enormous, cheap labor force to serve as the ‘factory of the world.” As a result of these gains, China’s per capita income today is over $12,500, compared to just under $2,300 for India.

World’s Highest Fertility Rates Drive Africa Population Surge

Over the course of this century, the world’s demographic profile is expected to change dramatically, as demonstrated in UN projections for 2050, and 2100.

Most regions are witnessing declines in fertility rates and increases in longevity. Fertility rates are below the replacement level in 83 countries.

But as populations in developed countries age, Africa will see a continued surge in its young population. Of the twenty-five countries with the highest fertility rates, twenty-four are in Africa. Niger has the world’s highest fertility rate at 6.6 percent, followed by Somalia and the Democratic Republic of Congo at 5.7 and 5.5 percent respectively.

Currently, only one African country — Nigeria — ranks among the world’s ten most populous countries. In 2050, that number will grow to three with DRC and Ethiopia joining their ranks. And in 2100, five of the world’s ten most populous countries are projected to be African, with Uganda and Tanzania joining the club.

The World’s Most Populated Countries

Here are the world’s most populous countries in 2022, according to the United Nations:

20. Thailand — 70.1 million

thailand largest country by population
Thailand is the world’s twentieth most populous country. (Image Credit: Wikimedia Commons)


19. Germany — 83.9 million

germany largest country by population europe
Germany is Europe’s most populous country after Russia. (Image Credit: Wikimedia Commons)


18. Turkey — 85.6 million

turkey most populated countries europe asia
Turkey would be the largest country by population in the European Union, if it were allowed to join the body. (Image Credit: Wikimedia Commons)


17. Iran — 86.0 million

Islamic Republic of Iran IRI Flag population
Iran’s population surged after the Islamic Revolution of 1979, but family planning policies have helped reduce the fertility rate to around replacement level. (Image Credit: Wikimedia Commons)


16. Democratic Republic of the Congo — 95.2 million

most populated countries democratic republic of congo
The Democratic Republic of the Congo is one of the world’s twenty most populous countries. By 2050, it will join the ranks of the top ten countries by population. (Image Credit: Wikimedia Commons)


15. Vietnam — 99.0 million

vietnam viet nam population demographics asia
Vietnam is one of Southeast Asia’s largest countries by population and home to one of its fastest-growing economies. (Image Credit: Wikimedia Commons)


14. Egypt — 106.2 million

egypt most populated countries world africa
Egypt is the third most populous country in Africa, behind Nigeria and Ethiopia. (Image Credit: Wikimedia Commons)

13. Philippines — 112.5 million

Philippines world's most populous countries
The Philippines is one of southeast Asia’s most populated countries. (Image Credit: Wikimedia Commons)

12. Ethiopia — 120.8 million

ethiopia most populated countries east africa
Ethiopia is East Africa’s most populous country. (Image Credit: Wikimedia Commons)

11. Japan — 125.6 million

Japan most populous countries
Japan has the world’s oldest population. (Image Credit: Wikimedia Commons)

10. Mexico — 131.6 million

most populated countries mexico north america
Mexico is North America’s second-most populated country behind the United States. (Image Credit: Wikimedia Commons)

9. Russian Federation — 145.8 million

russia most populous countries flag top arms exporters military
(Image Credit: Wikimedia Commons)

8. Bangladesh — 167.9 million

most populated countries bangladesh
Bangladesh’s population growth has slowed over the past two decades due to government-backed family planning education. (Image Credit: Wikimedia Commons)

7. Brazil — 215.4 million

brazil most populated countries
Brazil is South America’s most populous country. (Image Credit: Wikimedia Commons)

6. Nigeria — 216.7 million

nigeria most populated country
Nigeria is Africa’s most populous country. (Image Credit: Wikimedia Commons)

5. Pakistan — 229.5 million

pakistan most populated country population growth
Pakistan’s rapidly growing population was equal to that of Bangladesh in 1988. By 2050, it will be 50% larger. (Image Credit: Wikimedia Commons)

4. Indonesia — 279.1 million

most populated countries indonesia
Indonesia is the most populous country in southeast Asia. (Image Credit: Wikimedia Commons)

3. United States — 334.8 million

most populated countries united states
(Image Credit: Wikimedia Commons)

2. India — 1.41 billion

india most populated countries in the world
India will be the world’s most populated country in 2023, eclipsing China. (Image Credit: Wikimedia Commons)

1. China — 1.45 billion

China world's top biggest arms exporters
(Image Credit: Wikimedia Commons)

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