Key Highlights
- Tokyo remains the world’s most populous metropolis with 37.4 million residents.
- The top‑five list is dominated by Asian cities, while Brazil and Mexico occupy the middle tier.
- Rapid population growth in Delhi and Dhaka contrasts with stagnant or declining numbers in Osaka and Tokyo.
- Infrastructure strains—traffic congestion, housing shortages, and pollution—persist across all major cities.
- Despite challenges, major cities contribute significantly to global GDP and innovation.
Detailed Insights
Tokyo, Japan – The Greater Tokyo metropolitan area covers 13,452 km² and hosts a density of 2,642 people per km². Its population, hovering around 37.4 million, has declined marginally from 2023, reflecting an ageing demographic and limited land. Housing shortages force residents into compact 9 m² apartments.
Delhi, India – Delhi’s expanding sprawl now houses nearly 33 million inhabitants. A 2.73 % annual growth rate keeps the city pushing beyond infrastructure limits. Traffic congestion, polluted air, and half the population living in inadequate housing remain pressing issues.
Shanghai, China – With 29.2 million residents, Shanghai’s growth rate of 2.43 % is fueled by its status as a global trade hub. The city’s Nanjing Road offers 5.5 km of retail, rivaling London’s Oxford Street, drawing one million daily shoppers.
Dhaka, Bangladesh – Dhaka’s population, over 23.2 million, grows at 3.25 % yearly. The metropolis suffers from chronic flooding and unregulated development, causing overcrowded living conditions.
São Paulo, Brazil – Brazil’s largest city, home to 22.6 million people, grows at 0.85 %. Limited green space and inadequate public transport keep it battling congestion.
Mexico City, Mexico – With 22.3 million residents, Mexico City’s 0.89 % growth fosters urban sprawl, amplified by insufficient public transport and air pollution.
Cairo, Egypt – Cairo’s 22.2 million population and 1.99 % growth highlight the challenges of overcrowding, limited water resources, and high dust pollution.
Beijing, China – A 21.8 million city with a 2.03 % growth rate, Beijing balances economic power with pollution and rapid urban sprawl.
Mumbai, India – Mumbai’s 21.3 million residents and 1.6 % growth rate illustrate the strain on ports, housing, and traffic systems.
Osaka, Japan – Though slightly shrinking at −0.24 %, Osaka’s 19.0 million inhabitants demonstrate persistent high density and supply‑side constraints.
Key Concepts
- Urbanization: The progressive migration of the populace from rural to urban centers, fueling rapid city growth.
- Population Density: The number of individuals residing within a unit area, typically expressed as people per square kilometer.
- Metropolitan Area: The expansive region surrounding a core city that includes economically interconnected suburbs and satellite towns.
- Growth Rate: The annual percentage change in population, indicating whether a city is expanding or contracting.
- Housing Shortage: The imbalance between the demand for and supply of residential space, producing inflated rents and cramped living conditions.