A street near Hachiko Square in Shibuya, Tokyo, Japan.Ken Straiton/Getty Images
- Demographia measured the world's largest cities by population according to urban area.
- Urban areas are linked by commuting flows and social and economic interactions.
There are several ways to measure the population of the world's largest cities.
Demographia, an urban public policy and demographic analysis site, ranked the largest cities in the world by measuring the populations in urban areas as opposed to official city limits or metropolitan statistical areas.
As defined by Alex Blei, a program scholar at New York University's Stern Marron Institute Urban Expansion Project cited in Demographia's report, urban areas are contiguous, built-up areas that "function as an integrated economic unit, linked together by commuting flows, social and economic interactions."
Here are the top 20 largest cities in the world, with populations measured by urban area in 2022.
20. Lagos, Nigeria
Lagos, Nigeria. Tayvay/Shutterstock
19. Buenos Aires, Argentina
Buenos Aires, Argentina. Milosz Maslanka/Shutterstock
18. Moscow, Russia
Moscow, Russia. Poca Wander/Getty Images
17. Shenzhen, China
Shenzhen, China. Lam Yik Fei/Getty Images
16. Bangkok, Thailand
Bangkok, Thailand. Getty Images
15. Kolkata, India
Kolkata, India. Soltan Frédéric/Getty Images
14. Beijing, China
Beijing, China. LU JINRONG/Shutterstock
13. Dhaka, Bangladesh
Dhaka, Bangladesh. Meinzahn/Getty Images
12. Cairo, Egypt
Cairo, Egypt. Getty Images
11. New York, USA
New York, USA. Beata Zawrzel/Getty Images
10. Mexico City, Mexico
Mexico City, Mexico. Shutterstock
9. Seoul, South Korea
Seoul, South Korea. Cj Nattanai/Shutterstock
8. Sao Paulo, Brazil
Sao Paulo, Brazil. anacotrin/shutterstock
7. Shanghai, China
Shanghai, China. Sean Pavone/Shutterstock
6. Manila, Philippines
Manila, Philippines. Getty Images
5. Mumbai, India
Mumbai, India. Getty Images
4. Guangzhou, China
Guangzhou, China. Shutterstock/4045
3. Delhi, India
Delhi, India. hadynyah/Getty Images
2. Jakarta, Indonesia
Jakarta, Indonesia. Getty Images
1. Tokyo, Japan
Tokyo, Japan. visualspace/Getty Images