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Bakhtiyarpur, 
India
843,195 people lived in Bakhtiyarpur in 2025. It is the 623rd largest of the world's 12,138 cities, and the 94th largest in India.
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 Bakhtiyarpur grew
For every 10 people in Bakhtiyarpur in 1975, there were 55.7 in 2025.
On the UN's projection it will have 1.1 million people in 2050. On the UN's projection it passes a million people between 2035 and 2040.
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
Bakhtiyarpur through your family’s years
Put in the years your family were born. You’ll see how many people lived in Bakhtiyarpur in each of those years, and when each of them turned 30.
India · every city · 2025
Where it is
How to read this: every dot is one of the 2,054 cities in India in 2025, and a dot's area is how many people live there, the biggest being New Delhi. The ringed dot in colour is Bakhtiyarpur; 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, Bakhtiyarpur covered 149 km², and buildings, roads and other built-up land covered 12 km² of it. That is 14 m² of built-up land for each person, about a square 4 by 4 metres. Since 1975, its built-up land has grown to 10.1 times its size, and its people are 5.6 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 India
Its share of India
Of every 1,000 people in India in 2025, 1 lived in Bakhtiyarpur, which is 843,195 people.
How to read this: 1,000 squares stand for everyone in India, one square for every 1,000th person. Count the coloured ones and you have Bakhtiyarpur's share; the grey remainder live somewhere else in the country.
Ranked by people · 2025
Cities of a similar size
In the world, 2025
- 619 Gujrat Pakistan846,968
- 620 Faiyum Egypt846,831
- 621 Maracay Venezuela845,329
- 622 Umuahia Nigeria843,245
- 623 Bakhtiyarpur843,195
- 624 Kotwali839,900
- 625 Cuernavaca Mexico839,485
- 626 Fuyang China839,236
- 627 Colachel837,735
In India, 2025
- 594 Firozabad878,282
- 605 Bokaro862,593
- 606 Guntur862,068
- 616 Muzaffarnagar849,004
- 623 Bakhtiyarpur843,195
- 624 Kotwali839,900
- 627 Colachel837,735
- 628 Warangal837,561
- 636 Imphal824,757
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 Bakhtiyarpur 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 Bakhtiyarpur 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