Think London feels overcrowded? With almost 10 million people calling the capital home, the Tube at rush hour certainly suggests so. But globally, London doesn't even scrape into the top 30. In fact, it comes in 37th place, lagging behind 36 cities worldwide that pack in even more residents.
At the very top sits Tokyo, with an astonishing 37 million people, making it the undisputed king of megacities. Hot on its heels are India's swelling urban giants - Delhi (34.7m) and Mumbai (22.1m) - alongside China's Shanghai (30.5m) and Beijing (22.6m). Between them, India and China dominate the rankings, thanks to their immense populations and rapidly expanding cityscapes.
Other Asian heavyweights such as Dhaka (24.6m), Karachi (18.1m) and Manila (15.2m) reflect how fast the world's urban hubs are ballooning. And Africa is firmly on the rise: Kinshasa (17.8m) and Lagos (17.2m) have exploded in size, tipped to rival the very biggest before long.
Europe makes a modest showing - although Istanbul (16.2m) crosses continents, while Moscow (12.7m) and Paris (11.3m) remain the continent's only cities larger than London. In the Americas, Mexico City (22.8m), São Paulo (23m) and Buenos Aires (15.8m) showcase Latin America's pull.
So while London may feel bursting at the seams, the global reality is clear: our capital is a relative lightweight compared with the planet's true urban superpowers.

The 36 cities bigger than London
London - 9,840,740
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