How many people live in the Tokyo urban area, according to the UN’s 2025 estimate?
Guess before you scroll — the answer is below
The answer
33,413,000 people
Roughly 33.4M.
The UN counts about 33.4 million people in Tokyo's urban area in 2025, making it the third-largest city on Earth, behind Jakarta and Dhaka. Under the UN's older, country-specific definitions it was put at 37 million and ranked first. As Japan ages, it is projected to shrink to 30.7 million by 2050.
How to get close to this number
Start from the national population and apply the concentration. Japan has a little over a hundred and twenty million people, and roughly a quarter of them live in this single agglomeration. A quarter of a large country in one continuous built-up area is an extraordinary degree of concentration, even though the UN no longer ranks it first in the world.
The ranking change is mostly a change of ruler. Under the old country-specific definitions the figure was 37 million; the 2025 revision measures every city the same way, by the continuous dense settlement around its centre, and on that basis Tokyo comes out smaller while Jakarta and Dhaka come out far larger. Guesses anchored on the old textbook number land too high for exactly this reason.
The trend is the other thing worth knowing. Tokyo kept adding residents for years while Japan as a whole shrank, pulling people in from the rest of the country, but the UN projects the agglomeration itself to decline to 30.7 million by 2050. A city can stay the economic centre of gravity of an ageing country and still lose people once the whole country is shrinking fast enough.
Where this number comes from
| Source | UN DESA, World Urbanization Prospects 2025 |
|---|---|
| Figure refers to | 2025 |
| Last checked | |
| Unit | people |
Numbers move. If this one has drifted from its source, let us know.
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