All over the world, the trend is the same: people are moving from rural areas or suburbs to cities. And they grow and expand every year. Here are the ten largest cities in the world, based on population size. Check if you know them all.
1. TOKYO, JAPAN (POP: 37,435,191)
Tokyo is the largest city in the world with a population of 37,435,191 people. By comparison, there are 38 million in all of Canada. However, experts believe that Tokyo has reached the peak of its urbanization and has nowhere else to expand. Therefore, he will not be at the top of this list for long.
2. DELHI, INDIA (POPULATION: 29,399,141)
Delhi is the most populous city in India. Apart from its impressive size and population of 29,399,141 people, Delhi is also one of the oldest cities in the entire world. It played an important role throughout much of its history from the 6th century BC.
3. SHANGHAI, CHINA (POP: 26,317,104)
The largest metropolitan area in China is Shanghai with a population of 26,317,104 people. It is a global center of industry, finance, economics, research, science and much more. Some even consider Shanghai to be the largest city in the world because it is the most populous city defined by its geographical boundaries.
4. SAO PAULO, BRAZIL (POP: 21,846,507)
Sao Paulo is the most populous city in all of South America with a population of 21,846,507 people. It is also the largest city in the entire Western and Southern Hemisphere. São Paulo, located in the state of the same name, is an important urban center with a rich history of scientific research.
5. MEXICO CITY, MEXICO (POPULATION: 21,671,908)
Mexico City is the most populous city in all of North America with a population of 21,671,908 people. It is the largest Spanish-speaking city in the world and the oldest capital of the Americas. Mexico City was originally founded by the Aztecs as the ancient city of Tenochtitlan, but was later rebuilt by the Spanish. The fusion of both histories and cultures is evident today.
6. CAIRO, EGYPT (POP: 20,484,965)
Cairo is the largest city in Africa when considering the entire Cairo area, although it is surpassed by Lagos (Nigeria) in lists using other urban population definitions. Although Cairo is still associated with the ancient world - thanks to the nearby Pyramids of Giza - it is a modern city with famous educational and entertainment facilities.
7. DHAKA, BANGLADESH (POP: 20,283,552)
Dhaka is the capital of Bangladesh with a population of 20,283,552. It is the economic and cultural center of the country and another city with an ancient history. It was also a major center of trade and commerce during the medieval period. Today the city retains the architecture of its colonial and earlier history.
8. MUMBAI, INDIA (POP: 20,185,064)
Mumbai, which many still call Bombay, is the second Indian city to make the list, with a population of 20,185,064. Much of its history has been influenced by the colonial rule of Portugal and Great Britain. Mumbai later became an important center of the Indian independence struggle. Today it is the commercial center of the world, home to Bollywood and other cultural industries.
9. BEIJING, CHINA (POP: 20,035,455)
The Beijing metropolis, with a population of 20,035,455, is the second largest city in China after Shanghai. It is often called the billionaire capital of the world, as Beijing is home to more billionaires than any other city. Beijing is a center of culture, finance, economics, business, science and technology, making it the cultural and financial center of China and the world.
10. OSAKA, JAPAN (POP: 19,222,665)
Osaka is the second city in Japan to make the list, with a population of 19,222,665. It is also considered an important center of Japanese culture, finance and research. Osaka is an ancient city that is home to many historical attractions, including Osaka Castle, a five-story samurai castle, and Shitenno-ji, one of the oldest Buddhist temples in the country.

