According to the United Nations’ latest report on populations in cities, by 2030, “urban areas are projected to house 60 percent of people globally and one in every three people will live in cities with at least half a million inhabitants”. Growing in both size and number, cities are hubs of government, commerce, and transportation, and in 2021, the world’s 20 largest cities are home to half a billion people. In fact, one in five people worldwide lives in a city with more than 1 million inhabitants.

Below, we have rounded up the top 20 megacities in the world of 2021, according to the number of people that live in their metropolitan area. While Tokyo is the largest city on a global level, with a total of more than 37 million residents, the majority of the most populous cities in the world are in the two most populated countries, China and India. Among these, we have 5 metropolises in China, Shanghai, Beijing, Chongqing, Tianjin, and Guangzhou, and 3 in India, Delhi, Mumbai, and Kolkata. The largest city in the American continent is Sao Paulo in Brazil with 22 million people, followed by Mexico City and Buenos Aires in Argentina. Istanbul takes the 13th position with one part of the city lying in Europe and the other part in Asia.

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Read on below for the full results.

1- Tokyo, Japan

Population: 37,339,804

2- Delhi, India

Population: 31,181,376

3- Shanghai, China

Population: 27,795,702

4- Sao Paulo, Brazil

Population: 22,237,472

5- Mexico City, Mexico

Population: 21,918,936

6- Dhaka, Bangladesh

Population: 21,741,090

7- Cairo, Egypt

Population: 21,322,750

8- Beijing, China

Population: 20,896,820

9- Mumbai, India

Population: 20,667,656

10- Osaka, Japan

Population: 19,110,616

11- Karachi, Pakistan

Population: 16,459,472

12- Chongqing, China

Population: 16,382,376

13- Istanbul, Turkey

Population: 15,415,197

14- Buenos Aires, Argentina

Population: 15,257,673

15- Kolkata, India

Population: 14,974,073

16- Kinshasa, Democratic Republic of Congo

Population: 14,970,460

17- Lagos, Nigeria

Population: 14,862,111

18- Manila, Philippines

Population: 14, 158,573

19- Tianjin, China

Population: 13,794,450

20- Guangzhou, China

Population: 13,635,397