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Mbuye, 
Burundi
The UN expects Mbuye to count as a city from 2045, with 166,660 people. This is a projection: in 2025 it did not yet meet the UN's rule for a city.
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 Mbuye grew
For every 10 people in Mbuye in 2045, there were 20.3 in 2050.
On the UN's projection it will have 338,820 people in 2050. On the UN's projection it passes 250,000 people between 2045 and 2050. The UN first counts it as a city in 2045, when it passed 50,000 people.
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
Mbuye through your family’s years
Put in the years your family were born. You’ll see how many people lived in Mbuye 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). Mbuye is ringed, drawn at its 2045 size, in colour; the other cities are grey. Neighbouring countries are outlines.
Area and built-up land · km²
How much land it covers
In 2050, Mbuye covered 169 km², and buildings, roads and other built-up land covered 11 km² of it. That is 34 m² of built-up land for each person, about a square 6 by 6 metres. Since 2045, its built-up land has grown to 2.4 times its size, and its people are 2 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 Burundi
Its share of Burundi
Of every 100 people in Burundi in 2050, 1 lived in Mbuye, which is 338,820 people.
How to read this: 100 squares stand for everyone in Burundi, one square for every 100th person. Count the coloured ones and you have Mbuye's share; the grey remainder live somewhere else in the country.
Ranked by people · 2025
Cities of a similar size
In Burundi, 2025
How to read this: names are in order of size, the leading number being each city's rank among all 12,138 in 2025; the bars share a scale within a list. A jump in the ranks means a city under 300,000 people, which is not given a page here.
Apparatus
Sources and method
The figures for Mbuye are the UN's own, at five-year steps, every one of them projection, because the UN does not expect it to count as a city until 2045. 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 Mbuye 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