This list of the ten biggest metro areas is based on population. The figures given below are approximates. The population density is expressed in people / sq km.

Number 1 to 5

At number one is Tokyo, Japan. The population is 32,450,000. The total area is 8,014 sq km with a population density of 4,049. At number two is Seoul-Incheon-Gyeonggi in South Korea. Its population is 20,550,000. The total area is 5,076 sq km with a population density of 4,048.

The number third slot is occupied by Mexico City, Mexico. The total population is 20,450,000. The area measures 7,346 sq km. The population density is 2,784.

The number four slot is occupied by New York City in the United States. It has a population of 19,750,000. The area measures 17,884 sq km and the population density is 1,104. The fifth most populated is Mumbai, India. The population is 19,200,000 with an area of 2,350 sq km and a population density of 8,170.

Number 6 to 10

Jakarta, Indonesia is ranked sixth in the ten biggest metro areas. It has an estimated population of 18,900,000. The total Jakarta area is 5,100 sq km. The population density is 3,706.

At number 7 is Sao, Paulo, Brazil. The population has been estimated at 18,850,000. The area measures 8,479 sq km and the population density is 2,223. Delhi, India is at number eight. It has a population of 18,600,000. The area measures 3,182 sq km. The population density is 5,845.

At number 9 is Osaka-Kobe-Kyoto in Japan. The population has been put at 17,375,000. The area total is 6,930 sq km. The population density is 2,507. Shanghai, China occupies the tenth slot. It has a population of 16,650,000. The total area is 5,177 sq km and the population density is 3,216.

Defining a Metropolitan Area

The metropolitan area is one of the ways used to measure the size of cities. The basic idea is set on the concept of a labor market area. It is usually said to be an employment core. An employment core is a place with high density of available work. It also includes the areas that have strong connections to it, especially in commuting.

However, making a list of the ten biggest metro areas can be difficult. While the list above is usually used, the truth is that there is no general consensus on what constitutes a metropolitan area. This makes city comparisons quite complex.

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