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Zhangjiagang, 
China
1,068,192 people lived in Zhangjiagang in 2025. It is the 477th largest of the world's 12,138 cities, and the 69th largest in China.
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 Zhangjiagang'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 Zhangjiagang grew
Count 10 people in Zhangjiagang in 1975 and the same count gives 50.2 in 2025.
On the UN's projection it will have 959,889 people in 2050. It passed a million people between 2010 and 2015.
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
Zhangjiagang through your family’s years
Put in the years your family were born. You’ll see how many people lived in Zhangjiagang in each of those years, and when each of them turned 30.
China · every city · 2025
Where it is
How to read this: Zhangjiagang is the dot in colour with a ring around it. The grey dots are the other cities of China in 2025, 2,082 in all, led by Shanghai, 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, Zhangjiagang covered 260 km², and buildings, roads and other built-up land covered 72 km² of it. That is 67 m² of built-up land for each person, about a square 8 by 8 metres. Since 1975, its built-up land has grown to 21.7 times its size, and its people are 5 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 China
Its share of China
Of every 1,000 people in China in 2025, 1 lived in Zhangjiagang, which is 1.1 million people.
How to read this: 1,000 squares, one for every 1,000th person in China; the coloured squares live in Zhangjiagang. 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
- 473 Kaifeng1,087,088
- 474 Perth Australia1,079,374
- 475 Khulna Bangladesh1,074,134
- 476 Brisbane Australia1,071,628
- 477 Zhangjiagang1,068,192
- 478 Sofia Bulgaria1,067,136
- 479 Rostov-on-Don Russia1,065,880
- 480 Leeds United Kingdom1,065,607
- 481 Astana Kazakhstan1,065,387
In China, 2025
- 455 Huizhou1,137,670
- 469 Tianjia‘an1,100,258
- 470 Yancheng1,093,432
- 473 Kaifeng1,087,088
- 477 Zhangjiagang1,068,192
- 483 Honghuagang1,062,992
- 505 Luohe1,018,295
- 506 Binhai New Area1,017,230
- 512 Jinhua998,519
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 Zhangjiagang 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 Zhangjiagang 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