Rank
|
Population (Metro)
|
Answer
|
9
|
20,630,000
|
New York City
|
23
|
13,532,000
|
Tehran
|
25
|
12,084,000
|
Shenzhen
|
28
|
10,920,000
|
Tianjin
|
32
|
10,236,000
|
London
|
33
|
10,177,000
|
Nagoya
|
41
|
8,442,000
|
Dongguan
|
43
|
7,509,000
|
Wuhan
|
|
Rank
|
Population (Metro)
|
Answer
|
57
|
6,155,000
|
Nanjing
|
63
|
5,764,000
|
Houston
|
71
|
5,257,000
|
Milan
|
79
|
4,815,000
|
Harbin
|
80
|
4,800,000
|
Abidjan
|
82
|
4,738,000
|
Nairobi
|
89
|
4,478,000
|
Boston
|
|