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Hajipur, 
India
9,941,510 people lived in Hajipur in 2025. It is the 34th largest of the world's 12,138 cities, and the 6th largest in India.
The UN measures every city in the world the same way, by where the buildings are rather than where the boundary runs, so this figure and Hajipur's own can differ widely. What counts as a city here.
Verified 2026-09-30 · 73 canaries
People · every five years · 1975 to 2050
How Hajipur grew
For every 10 people in Hajipur in 1975, there were 133.3 in 2025.
On the UN's projection it will have 13.7 million people in 2050. On the UN's projection it passes ten million people between 2025 and 2030.
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
Hajipur through your family’s years
Put in the years your family were born. You’ll see how many people lived in Hajipur in each of those years, and when each of them turned 30.
India · every city · 2025
Where it is
How to read this: Hajipur is the dot in colour with a ring around it. The grey dots are the other cities of India in 2025, 2,054 in all, led by New Delhi, each drawn with an area that matches its people. Countries next door are outlines only.
Area and built-up land · km²
How much land it covers
In 2025, Hajipur covered 3,092 km², and buildings, roads and other built-up land covered 178 km² of it. That is 18 m² of built-up land for each person, about a square 4 by 4 metres. Since 1975, its built-up land has grown to 22.9 times its size, and its people are 13.3 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 India
Its share of India
Of every 1,000 people in India in 2025, 7 lived in Hajipur, which is 9.9 million people.
How to read this: 1,000 squares, one for every 1,000th person in India; the coloured squares live in Hajipur. 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
- 30 Kinshasa Democratic Republic of the Congo10,943,641
- 31 Bogotá Colombia10,624,315
- 32 Lima Peru10,580,241
- 33 London United Kingdom10,416,420
- 34 Hajipur9,941,510
- 35 Rio de Janeiro Brazil9,500,336
- 36 Paris France9,381,921
- 37 Hyderabad9,190,795
- 38 Tehran Iran9,174,964
In India, 2025
- 9 Kolkata22,549,738
- 12 Mumbai20,203,056
- 24 Bengaluru13,187,098
- 29 Chennai11,153,205
- 34 Hajipur9,941,510
- 37 Hyderabad9,190,795
- 44 Ahmedabad7,632,408
- 53 Surat6,908,925
- 55 Pune6,817,951
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 Hajipur 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 Hajipur 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