General Knowledge
City Population Showdown Quiz
Mumbai vs. Mexico City — can you guess which city has more people?
Mumbai vs. Mexico City — can you guess which city has more people?
Kinshasa in the DRC has surpassed Paris to become the world's largest French-speaking city, with over 17 million residents.
Each round presents 10 randomized multiple-choice questions drawn from a pool of 50, so every playthrough is different. You get instant feedback with explanations after each answer, plus a shareable score at the end.
Challenge your assumptions about city sizes around the world. Discover why Tokyo remains the world's most populous metro area at 37 million, how Istanbul is larger than any EU city, why Kinshasa surpassed Paris as the largest Francophone city, and which cities are growing fastest in the developing world.
Tokyo, Japan holds the title of the world's most populous metropolitan area with approximately 37 million people. By city proper population, Tokyo has about 14 million, while cities like Shanghai (~29 million), Delhi (~32 million), and Beijing (~22 million) are larger within their administrative boundaries.
The fastest-growing cities are predominantly in Africa and South Asia. Lagos, Nigeria is growing by roughly 77 people per hour. Kinshasa, Dhaka, and Dar es Salaam are also among the fastest-growing megacities. By 2050, many of the world's largest cities will be in Africa.
City proper refers to the population within official administrative boundaries, while metropolitan area includes surrounding suburbs and connected urban zones. This difference can be enormous — Paris city proper has about 2 million people, but its metro area has over 12 million. Tokyo city proper is 14 million but its metro area reaches 37 million.
Last updated: April 2026