1. Tokyo, Japan

• Tokyo tops the list of world city populations with a population of 37,274,000.
• Tokyo's population growth has slowed in recent years despite the decent number of people living in the megacity.
•  A 0.09 percent drop from 2018 to 2019 to a 0.18 percent drop from 2021 to 2022 is noticed in the population of the city.
• According to the experts, this is because of the aging population paired and low birth rates.
• Another reason could the citizen-employee relocation as the Japanese government implemented tax incentives for Japanese companies to move from Tokyo to less-populated prefectures and offered subsidies for those who relocate.

2. Delhi, India

• The second rank for the most populated megacity in Delhi, India, with a population of 32,065,760.
•  This ranking might be short-lived because according to some studies, Delhi's population will reach a potential 56.4 million people by the year 2028.
•  A lot of people including students, employees, and explorers move to Delhi as it is home to several attractions that have each been designated as a World Heritage Site, including Red Fort Complex, named for its red-tinted limestone walls.

3. Shanghai, China

• Shanghai, China's commercial powerhouse and home to the world's largest seaport has a population of 28,516,904. 
• Shanghai has recorded year-over-year population growth ranging from 2.59 percent to 2.87 percent since the year 2018 and would probably secure its place in the top three megacities.

4. Dhaka, Bangladesh

• One of the world's most densely populated cities with a population of  22,478,116 people,  Dhaka, Bangladesh, is skyrocketing through the rankings of the world's most populous cities by moving up to the fourth rank from seventh.
•  Located at the center of Bangladesh, which borders the Bay of Bengal in the Indian Ocean, this city serves as the country's administrative and economic powerhouse. 

5. São Paulo, Brazil

• Coming on rank five São Paulo, Brazil has a population of 22,429,800, it's at the top among Brazil's 110 urban areas. 
• Located in southeastern Brazil, it is surrounded by valleys and foothills. 
• The largest city in the Southern Hemisphere and has gained a global reputation as a commercial and industrial center. 

6. Mexico City, Mexico

• The sixth-ranked city with a population of 22,085,140 Mexico City has grown more than 540 percent since 1950. 
• During the 1900s, the capital city sank an estimated 29 to 36 feet (9 to 11 meters) since it sits on an underground aquifer that is being continually depleted. 
• In 1958, there was a ban on drilling new wells into the aquifer but the clay soil under Mexico City kept compressed at steady rates. 
• Several sections of the city are sinking up to 19 inches which is 50 centimeters per year.

7. Cairo, Egypt

• The seventh-ranked Cairo, Egypt, has a population of 21,750,020 people. 
•  Cairo consists of the Pyramids of Giza and historical archeological finds, including the recent discovery of mummies with gold-plated tongues. 

8. Beijing, China

• The eighth-ranked Beijing, China has a population of  21,333,332 and is home to one of the largest and most well-preserved architectural complexes of antiquity, known as The Forbidden City.
• Since 1975, the population in Beijing, China, has been rising — and is expected to continue to grow through at least 2035, according to a United Nations report.

9. Mumbai, India

• The second last mega-city Mumbai, often referred to by its old name Bombay has a population of 20,961,472 people. 
• Mumbai earned the name 'City of Dreams' as it is the center of Bollywood, the Indian film industry.

10. Osaka, Japan

• Finally with the last legality on our 2022 list Osaka Japan has a population of 19,059,856 people.
• Though the population growth is expected to decrease year-over-year through 2035 because of residents moving from the city to outlying suburban areas.