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Chattogram, 
Bangladesh
4,983,553 people lived in Chattogram in 2025. It is the 83rd largest of the world's 12,138 cities, and the 2nd largest in Bangladesh.
Like every city on this site, Chattogram 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 Chattogram grew
Where Chattogram had 10 people in 1975, it had 35.2 in 2025.
On the UN's projection it will have 5.9 million people in 2050. On the UN's projection it passes five million 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
Chattogram through your family’s years
Put in the years your family were born. You’ll see how many people lived in Chattogram in each of those years, and when each of them turned 30.
Bangladesh · every city · 2025
Where it is
How to read this: Bangladesh and its 233 cities in 2025, each a dot whose area is its number of people (the largest is Dhaka). Chattogram 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, Chattogram covered 524 km², and buildings, roads and other built-up land covered 67 km² of it. That is 13 m² of built-up land for each person, about a square 4 by 4 metres. Since 1975, its built-up land has grown to 2.8 times its size, and its people are 3.5 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 Bangladesh
Its share of Bangladesh
Of every 100 people in Bangladesh in 2025, 3 lived in Chattogram, which is 5.0 million people.
How to read this: 100 squares stand for everyone in Bangladesh, one square for every 100th person. Count the coloured ones and you have Chattogram's share; the grey remainder live somewhere else in the country.
Ranked by people · 2025
Cities of a similar size
In the world, 2025
- 79 Yaoundé Cameroon5,106,087
- 80 Kochi India5,077,670
- 81 Hanoi Vietnam5,068,414
- 82 Lucknow India5,052,444
- 83 Chattogram4,983,553
- 84 Singapore Singapore4,963,998
- 85 Kampala Uganda4,880,943
- 86 Zhengzhou China4,878,035
- 87 Hefei China4,867,000
In Bangladesh, 2025
- 2 Dhaka36,585,479
- 83 Chattogram4,983,553
- 133 Savar3,557,381
- 169 Brahmanbaria2,914,727
- 387 Kishoreganj1,324,096
- 409 Sylhet1,242,548
- 475 Khulna1,074,134
- 488 Kutubdia1,053,339
- 560 Chandanaish928,788
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 Chattogram 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 Chattogram 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