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What is the biggest city in the world?

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Determining the world's largest cities depends on which definitions of city are used. The United Nations uses three definitions for what constitutes a city, as not all cities may be classified using the same criteria. Cities may be defined as the cities proper, the extent of their urban area, or their metropolitan regions. read more

The data on these 30 largest cities of the world as of 2014 reflects the best possible estimates of the populations of these huge cities. It is notoriously difficult to measure urban populations, especially in developing countries. read more

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