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Fomboni, 
Comoros
236,750 people lived in Fomboni in 2025. It is the 2478th largest of the world's 12,138 cities, and the largest in the Comoros.
Like every city on this site, Fomboni is counted as a built-up area seen from above rather than as a city government's territory. Why that changes the number.
Verified 2026-09-30 · 73 canaries
People · every five years · 1975 to 2050
How Fomboni grew
Where Fomboni had 10 people in 1975, it had 29.8 in 2025.
On the UN's projection it will have 366,784 people in 2050. On the UN's projection it passes 250,000 people between 2025 and 2030.
projected (after 2025) · how sure the UN is: high moderate low
How to read this: read it left to right, 1975 to 2050, one column every five years, the height being people. Hatching marks the projected years. Below, a strip of the UN's confidence: strong colour where the census maps are recent and detailed, pale where they are not, blank where the place was not counted as a city.
People · your family's years · 1975 to 2050
Fomboni through your family’s years
Put in the years your family were born. You’ll see how many people lived in Fomboni in each of those years, and when each of them turned 30.
Comoros · every city · 2025
Where it is
How to read this: every dot is one of the 2 cities in the Comoros in 2025, and a dot's area is how many people live there. The ringed dot in colour is Fomboni; the grey dots are the rest. The outlines around them are neighbouring countries.
Area and built-up land · km²
How much land it covers
In 2025, Fomboni covered 14 km², and buildings, roads and other built-up land covered 1.1 km² of it. That is 5 m² of built-up land for each person, about a square 2 by 2 metres.
How to read this: the outer pale square stands for all the land the city covers, and the solid square inside it for the part with buildings, roads and the like on it. All three squares share a scale, so you can compare them by eye. A hatched one is a year the UN has projected.
Of every 100 people in the Comoros
Its share of the Comoros
Of every 100 people in the Comoros in 2025, 27 lived in Fomboni, which is 236,750 people.
How to read this: shrink the Comoros to 100 people and this is what you get. The coloured squares are the ones who would live in Fomboni; 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
- 2469 Manikganj Bangladesh237,163
- 2470 Lakhnaur India237,133
- 2471 Raqqa Syria237,106
- 2472 Bonsa Bota Ethiopia237,061
- 2478 Fomboni236,750
- 2479 Ha'il Saudi Arabia236,744
- 2482 Modanganj India236,293
- 2483 Amarpur India236,273
- 2486 Funtua Nigeria236,087
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 Fomboni 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 Fomboni 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