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Megacities - Statistics & Facts

Megacities have been defined by the United Nations as cities with more than ten million inhabitants. The broader definition of city is more difficult to establish as these areas are sometimes referred to as "city proper", "urban agglomeration", or "metropolitan area". Each of these distinctions have important implications for designating urban boundaries, which consequently affects how the population size is determined.

Despite varying definitions, it is without a doubt that city populations have been on the rise steadily throughout the 20th and 21st centuries. The number of people living in urban areas with populations of 10 million or more has jumped from 69.5 million in 1975 to a staggering 472.8 million in 2015. China has had a significant impact on this growth, with more than half of its population living in urban areas in 2017. As of 2018, the three largest urban agglomerations are Tokyo, Delhi, and Shanghai with populations of 37.4, 28.5, and 25.6 million people, respectively.

Megacities also present various economic opportunities for countries and its citizens, including possibilities for innovation, education, interconnectivity and development. It is estimated that by 2030, 5 percent of the world's top 20 megacities will contribute 21 percent of global GDP. New York City alone is projected to have a GDP of approximately 44 billion U.S. dollars by 2030. Accompanying these enormous productive boosts are various challenges for increasingly concentrated urban areas, namely cities marked by slums, high crime rates, homelessness, traffic congestion, and troubles managing energy and waste resources. These issues have and continue to pose complex challenges for countries rapidly urbanizing in the 21st century.

Interesting statistics

In the following 4 chapters, you will quickly find the 24 most important statistics relating to "Megacities".

Global megacities

Dossier on the topic

All important statistics are prepared by our experts – available for direct download as PPT & PDF!

Important key figures

The most important key figures provide you with a compact summary of the topic of "Megacities" and take you straight to the corresponding statistics.

Land Use in Megacities

Megacities in the Asia-Pacific Region

Megacity Economies


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