Holiday Video: How Big Can Cities Get?


Davos Amos ask how big cities can get. Many megacities, largely defined as over 10 million people, are rapidly growing in industrialized countries. But cities over 100 million–gigacities–could be possible this century as megacities grow and merge.

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Stephen is an urban planner with a passion for promoting sustainable, livable, and diverse cities. He advocates for smart policies, regulations, and implementation programs that enhance urban environments by committing to quality design, accommodating growth, providing a diversity of housing choices, and adequately providing public services. Stephen primarily writes about land use and transportation issues.


  1. Gigacity isn’t the right term for one with 100 million. The Giga prefix signifies 2^30, or its decimal approximation 10^9. So you’d need a billion people to be a gigacity.

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