A mega-city is usually defined as a metropolitan area with a total population in excess of ten million people. A megacity can be a single metropolitan area or two or more metropolitan areas that converge.
As of 2013, there are 24 mega-cities in existence according to the Population Reference Bureau. The largest of these are the metropolitan areas of Tokyo, Delhi, Mexico City, New York and Shanghai: each of these has a population in excess of 20 million inhabitants.
Tokyo is the largest metropolitan area, while Shanghai is the largest city proper.
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As of 2013, there are 24 mega-cities in existence according to the Population Reference Bureau. The largest of these are the metropolitan areas of Tokyo, Delhi, Mexico City, New York and Shanghai: each of these has a population in excess of 20 million inhabitants.
Tokyo is the largest metropolitan area, while Shanghai is the largest city proper.
/what-is-a-mega-city.html