The Worlds Largest / Biggest Megacities

A metropolis or commuter belt with more than 10 million people residing in it is known as a megacity. There are numerous megacities across the planet

The biggest megacites right now are as follows:

Rank	Megacity	Country	Population
1	Tokyo	Japan	34,200,000
2	Guangzhou	China	24,900,000
3	Seoul	South Korea	24,500,000
4	Delhi	India	23,900,000
5	Mumbai	India	23,300,000
6	Mexico City	Mexico	22,800,000
7	New York City	USA	22,200,000
8	São Paulo	Brazil	20,800,000
9	Manila	Philippines	20,100,000
10	Shanghai	China	18,800,000
11	Jakarta	Indonesia	18,700,000
12	Los Angeles	USA	17,900,000
13	Karachi	Pakistan	16,900,000
14	Osaka	Japan	16,800,000
15	Kolkata	India	16,600,000
16	Cairo	Egypt	15,300,000
17	Buenos Aires	Argentina	14,800,000
18	Moscow	Russia	14,800,000
19	Dhaka	Bangladesh	14,000,000
20	Beijing	China	13,900,000
21	Tehran	Iran	13,100,000
22	Istanbul	Turkey	13,000,000
23	London	United Kingdom	12,500,000
24	Rio de Janeiro	Brazil	12,500,000
25	Lagos	Nigeria	12,100,000
26	Paris	France	10,197,678

Source: Wikipedia