Hyderabad is an Indian metropolitan city with a population of 4.07 million. The Census Commission of India defines a metropolitan city as a city with a population over 4 million. Therefore, Hyderabad became a metropolitan city when its population reached 4 million. This was estimated to be sometime during the year 2009. So Hyderabad was added as a metropolitan city in 2009.

Asia, particularly countries like Japan and South Korea, had the most densely populated metropolitan areas in the twentieth century. Cities like Tokyo and Seoul experienced rapid population growth and urbanization, leading to high population density in their metropolitan areas.

metropolitan areas

Most of Argentina's population is clustered in the cities with the ten largest metropolitan areas accounting for half of the population.

Metropolitan statistical areas were defined by the U.S. Office of Management and Budget to provide a consistent definition of metropolitan areas for statistical data collection and analysis. These areas help in understanding population trends, economic activities, and urban development patterns in a standardized way across the country.