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The question of which are the world's largest cities is a complex one, to which there is no single correct answer, simply because there are many different ways of defining a 'city'. One concept is the metropolitan area, which is based on the concept of a labor market area and is typically defined as an employment core (an area with a high density of available jobs) and the surrounding areas that have strong commuting ties to the core.
The following is a list of the twenty largest metropolitan areas in 2003 as defined by one source.[1] As population figures are interpreted and presented differently according to different methods of data collection, definitions and sources, these numbers should be viewed as approximate. Data from other sources may be equally valid but differ due to being measured according to different criteria or taken from different census years.
| Rank | Metropolitan area | Country | Population | Area (km2) | Population Density (People/km2) |
|---|---|---|---|---|---|
| 1 | Tokyo |  Japan |
32,450,000 | 8,014 | 4,049 |
| 2 | Seoul |  South Korea |
20,550,000 | 5,076 | 4,048 |
| 3 | Mexico City[2] |  Mexico |
20,450,000 | 7,346 | 2,784 |
| 4 | New York City[3] |  United States |
19,750,000 | 17,884 | 1,104 |
| 5 | Mumbai |  India |
19,200,000 | 2,350 | 8,170 |
| 6 | Jakarta |  Indonesia |
18,900,000 | 5,100 | 3,706 |
| 7 | São Paulo |  Brazil |
18,850,000 | 8,479 | 2,223 |
| 8 | Delhi | India |
18,600,000 | 3,182 | 5,845 |
| 9 | Osaka-Kobe-Kyoto | Japan |
17,375,000 | 6,930 | 2,507 |
| 10 | Shanghai |  China |
16,650,000 | 5,177 | 3,216 |
| 11 | Metro Manila |  Philippines |
16,300,000 | 2,521 | 6,466 |
| 12 | Hong Kong-Shenzhen[4] | China |
15,800,000 | 3,051 | 5,179 |
| 13 | Los Angeles | United States |
15,250,000 | 10,780 | 1,415 |
| 14 | Kolkata | India |
15,100,000 | 1,785 | 8,459 |
| 15 | Moscow |  Russia |
15,000,000 | 14,925 | 1,005 |
| 16 | Cairo |  Egypt |
14,450,000 | 1,600 | 9,031 |
| 17 | Buenos Aires |  Argentina |
13,170,000 | 10,888 | 1,210 |
| 18 | London |  United Kingdom |
12,875,000 | 11,391 | 1,130 |
| 19 | Beijing | China |
12,500,000 | 6,562 | 1,905 |
| 20 | Karachi |  Pakistan |
11,800,000 | 1,100 | 10,727 |
References and notes
- ^ R.L. Forstall, R.P. Greene, and J.B. Pick, 'Which are the largest? Why published populations for major world urban areas vary so greatly', City Futures Conference, (University of Illinois at Chicago, July 2004) – Table 5 (p.34)
- ^ Consists of two separate zona metropolitanas: the Zona Metropolitana del Valle de Mexico (ZMVM) and the Zona Metropolitana de Toluca (ZMT)
- ^ Consists of two separate metropolitan statistical areas (MSA): the New York-Northern New Jersey Long Island MSA and the Bridgeport-Stamford-Norwalk MSA.
- ^ There are restrictions on the movement of labor between Hong Kong and mainland China and the two areas are sometimes listed separately in other lists.
See also
- World's largest urban agglomerations
- List of urban areas by population
- List of cities proper by population
- Larger Urban Zone - for an attempt at a harmonized definition for certain EU cities
Lists of metropolitan areas by region
Lists of metropolitan areas by country or region
External links
- demographia.com
- citypopulation.de
- World Gazetteer
- PopulationData.net: all 1M+ inhabitants Metropolitan Areas
- OECD Territorial Reviews - Competitive Cities in the Global Economy - has some definitions for OECD countries
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