Topics
Oita, 
Japan
372,190 people lived in Oita in 2025. It is the 1533rd largest of the world's 12,138 cities, and the 22nd largest in Japan.
That figure counts the whole built-up area, not the area Oita governs, so it may be far from the number the city publishes about itself. How the UN measures a city.
Verified 2026-09-30 · 73 canaries
People · every five years · 1975 to 2050
How Oita grew
Where Oita had 10 people in 1975, it had 28.4 in 2025.
On the UN's projection it will have 285,897 people in 2050. It passed 250,000 people between 1985 and 1990.
projected (after 2025) · how sure the UN is: high moderate low
How to read this: one column every five years, 1975 to 2050; its height is the number of people. Hatched columns are the UN's projection. The thin strip beneath says how sure the UN is of each figure: the stronger the colour, the surer. A blank means the place was not on the UN's list of cities that year.
People · your family's years · 1975 to 2050
Oita through your family’s years
Put in the years your family were born. You’ll see how many people lived in Oita in each of those years, and when each of them turned 30.
Japan · every city · 2025
Where it is
How to read this: Japan and its 137 cities in 2025, each a dot whose area is its number of people (the largest is Tokyo). Oita is ringed, in colour; the other cities are grey. Neighbouring countries are outlines.
Area and built-up land · km²
How much land it covers
In 2025, Oita covered 144 km², and buildings, roads and other built-up land covered 36 km² of it. That is 98 m² of built-up land for each person, about a square 10 by 10 metres. Since 1975, its built-up land has grown to 2.5 times its size, and its people are 2.8 times as many.
How to read this: each pale square is the city's whole area, the strong square inside it the part that is built on; one scale for all three, so a bigger square is more land. Hatched is the UN's projection.
Of every 100 people in Japan
Its share of Japan
Of every 1,000 people in Japan in 2025, 3 lived in Oita, which is 372,190 people.
How to read this: shrink Japan to 1,000 people and this is what you get. The coloured squares are the ones who would live in Oita; the grey ones are everybody else, in other cities, in towns and out in the country.
Ranked by people · 2025
Cities of a similar size
In the world, 2025
- 1529 La Paz Mexico372,988
- 1530 Khagaria India372,707
- 1531 Abonnema Nigeria372,654
- 1532 Ivanovo Russia372,200
- 1533 Oita372,190
- 1534 Celaya Mexico372,139
- 1535 Oyigbo Nigeria371,913
- 1536 Liuyang China371,661
- 1537 Pasto Colombia371,637
In Japan, 2025
- 1275 Matsuyama437,355
- 1295 Takasaki [Maebashi]431,687
- 1326 Niigata422,238
- 1521 Numazu374,507
- 1533 Oita372,190
- 1605 Fukuyama355,352
- 1622 Utsunomiya352,816
- 1678 Takamatsu340,478
- 1729 Yokkaichi332,173
How to read this: the figure in front of a name is where that city stands among the 12,138 cities the UN counted in 2025, and each bar is its people, on one scale per list. Numbers are missing where a city has fewer than 300,000 people and so has no page of its own.
Apparatus
Sources and method
The figures for Oita are the UN's own, at five-year steps: an estimate for each of 1975 to 2025, then projection to 2050. Projected years are drawn hatched, and the UN publishes no range of uncertainty for a city. What a city means here, how the UN measures one, and why that number can differ from the one Oita publishes about itself: how the figures here are put together.
Sources: UN WUP 2025 · Natural Earth · flag-icons. Every source, its licence and how to cite it →
Verified 2026-09-30 · 73 canaries