Geographies in Depth

Large population decline expected in China and India

Passengers travel in a crowded suburban train at a railway station in Mumbai February 26, 2008. India's Railways Minister Lalu Prasad Yadav announced a cut of 50 rupees ($1.25) in passenger fares for express trains as he presented the annual budget for one of the world's largest networks on Tuesday.   REUTERS/Arko Datta (INDIA) - GM1E42Q1DYJ01

This will make Nigeria the second-largest nation on Earth ahead of China by 2094. Image: REUTERS/Arko Datta

Katharina Buchholz
Data Journalist, Statista
  • Research by the University of Washington suggests that population declines in India and China could be more rapid than previously thought.
  • Growing access to education and contraception for women could catapult Indian and Chinese fertility below replacement levels quickly.
  • The researchers did not see the same factors at play in most African nations, where population growth will continue to 2100 and beyond.

While experts have long agreed that the world has already set the course for a future population decline, there has been disagreement about just how fast and where exactly the number of people on this Earth will shrink.

Medical journal The Lancet recently published research by the University of Washington suggesting that population decline could be more rapid than previously thought, especially in the world’s most populous nations China and India. The researchers assume that world population will peak already just after the middle of the century, earlier than projected by the U.N. Population Division. They pointed out that models of populations growth have proven to be very stable while those dealing with population decline were much less reliable.

In their base scenario, researchers assumed growing access to education and contraception for women would catapult Indian and Chinese fertility below replacement levels quickly, leading to population levels of just 1.1 billion and 731 million people in India and China in 2100, respectively. The researchers did not see the same factors at play in most African nations, where population growth would continue to 2100 and beyond, according to the model. This would make Nigeria the second-largest nation on Earth ahead of China by 2094.

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The U.S. would remain the fourth-largest nation in 2100, despite below-replacement levels of fertility. Here – similar to the situation in Canada and Australia – positive net migration would keep population levels semi-stable. Also by 2100, current growth nations Indonesia and Pakistan would have entered a slight population decline per the model, with the Democratic Republic of the Congo and Ethiopia overtaking them in size around the turn of the new century.

China India Africa Future of Economic Progress Environment and Natural Resource Security
The U.S. will remain the fourth-largest nation in 2100, despite below-replacement levels of fertility. Image: Statista
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