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Kayanza, 
Burundi
131,192 people lived in Kayanza in 2025. It is the 4657th largest of the world's 12,138 cities, and the 4th largest in Burundi.
This is the UN's built-up area, drawn from satellite pictures and census maps rather than from the city limits, and the two can be a long way apart. The rule behind it.
Verified 2026-09-30 · 73 canaries
People · every five years · 1975 to 2050
How Kayanza grew
Count 10 people in Kayanza in 2000 and the same count gives 25.4 in 2025.
On the UN's projection it will have 430,139 people in 2050. On the UN's projection it passes 250,000 people between 2035 and 2040. The UN first counts it as a city in 2000, when it passed 50,000 people.
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
Kayanza through your family’s years
Put in the years your family were born. You’ll see how many people lived in Kayanza in each of those years, and when each of them turned 30.
Burundi · every city · 2025
Where it is
How to read this: Burundi and its 12 cities in 2025, each a dot whose area is its number of people (the largest is Bujumbura). Kayanza 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, Kayanza covered 13 km², and buildings, roads and other built-up land covered 1.7 km² of it. That is 13 m² of built-up land for each person, about a square 4 by 4 metres. Since 2005, its built-up land has grown by 70%, and its people are 2 times as many.
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 Burundi
Its share of Burundi
Of every 1,000 people in Burundi in 2025, 9 lived in Kayanza, which is 131,192 people.
How to read this: 1,000 squares, one for every 1,000th person in Burundi; the coloured squares live in Kayanza. The grey rest live in other cities, in towns or in the countryside.
Ranked by people · 2025
Cities of a similar size
In the world, 2025
- 4542 `Adan Barakah Yemen134,066
- 4554 Chilanga Zambia133,860
- 4569 Rajoir Bangladesh133,428
- 4637 Alipur Pakistan131,848
- 4657 Kayanza131,192
- 4681 Areka Ethiopia130,386
- 4695 Sandila India130,012
- 4719 Domeez Iraq129,444
- 4771 Mtwara Tanzania128,086
In Burundi, 2025
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 Kayanza are the UN's own, at five-year steps: an estimate for each of 2000 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 Kayanza 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