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Simri Bakhtiarpur, 
India
311,434 people lived in Simri Bakhtiarpur in 2025. It is the 1841st largest of the world's 12,138 cities, and the 302nd 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 Simri Bakhtiarpur grew
For every 10 people in Simri Bakhtiarpur in 1975, there were 58.8 in 2025.
On the UN's projection it will have 442,490 people in 2050. It passed 250,000 people between 2010 and 2015.
projected (after 2025) · how sure the UN is: high moderate low
How to read this: each column is one of the UN's five-yearly estimates, 1975 through 2050, and taller means more people. Where a column is hatched the year has not happened yet. The strip under the columns is the UN's own confidence in each figure, palest where it is least sure; where it is blank the city was not on the list at all.
People · your family's years · 1975 to 2050
Simri Bakhtiarpur through your family’s years
Put in the years your family were born. You’ll see how many people lived in Simri Bakhtiarpur 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 Simri Bakhtiarpur; 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, Simri Bakhtiarpur covered 90 km², and buildings, roads and other built-up land covered 3.8 km² of it. That is 12 m² of built-up land for each person, about a square 3 by 3 metres. Since 1995, its built-up land has grown to 3.8 times its size, and its people are 3.5 times as many.
How to read this: pale is the whole of the city's land; the stronger square inside it is what is actually built on. The three are drawn to the same scale, so a larger square really is more land, and hatching means the year is the UN's projection rather than a count.
Of every 100 people in India
Its share of India
Fewer than 1 in every 1,000 people in India lived in Simri Bakhtiarpur in 2025 — about 1 in 4,762.
Ranked by people · 2025
Cities of a similar size
In the world, 2025
- 1837 Bidar312,534
- 1838 Antsiramandroso Madagascar312,434
- 1839 Vizianagaram312,315
- 1840 Holguín Cuba312,173
- 1841 Simri Bakhtiarpur311,434
- 1842 Oshawa Canada311,294
- 1843 Arlington United States311,130
- 1844 Rouen France311,071
- 1845 Modesto United States310,818
In India, 2025
- 1828 Kodarma313,949
- 1830 Gandhidham313,691
- 1837 Bidar312,534
- 1839 Vizianagaram312,315
- 1841 Simri Bakhtiarpur311,434
- 1856 Beed310,278
- 1863 Madhepura309,065
- 1873 Damoh307,218
- 1878 Bankura306,650
How to read this: the number before each name is its place among all 12,138 cities in the world in 2025; bars are people, on one scale per list. Only cities that reach 300,000 people have a page here, so a gap in the numbers is a smaller city.
Apparatus
Sources and method
The figures for Simri Bakhtiarpur 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 Simri Bakhtiarpur 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