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Dinghai District, 
China
257,524 people lived in Dinghai District in 2025. It is the 2265th largest of the world's 12,138 cities, and the 408th 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 Dinghai District'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 Dinghai District grew
Count 10 people in Dinghai District in 1975 and the same count gives 43.9 in 2025.
On the UN's projection it will have 342,377 people in 2050. It passed 250,000 people between 2020 and 2025.
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
Dinghai District through your family’s years
Put in the years your family were born. You’ll see how many people lived in Dinghai District in each of those years, and when each of them turned 30.
China · every city · 2025
Where it is
How to read this: China and its 2,082 cities in 2025, each a dot whose area is its number of people (the largest is Shanghai). Dinghai District 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, Dinghai District covered 31 km², and buildings, roads and other built-up land covered 7.1 km² of it. That is 28 m² of built-up land for each person, about a square 5 by 5 metres. Since 1975, its built-up land has grown to 3.4 times its size, and its people are 4.4 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
Fewer than 1 in every 1,000 people in China lived in Dinghai District in 2025 — about 1 in 5,556.
Ranked by people · 2025
Cities of a similar size
In the world, 2025
- 2259 Abua Nigeria258,314
- 2260 Masaurhi India258,274
- 2262 Netanya Israel257,714
- 2263 Kherson Ukraine257,682
- 2265 Dinghai District257,524
- 2266 Zahrat Laban Saudi Arabia257,467
- 2267 Cabo San Lucas Mexico257,436
- 2268 Murrieta United States257,413
- 2270 Otukpo Nigeria257,334
In China, 2025
- 2162 Wuqing269,223
- 2187 Yaguang266,899
- 2200 Jining265,293
- 2248 Jianhu259,681
- 2265 Dinghai District257,524
- 2315 Golmud251,353
- 2316 Shehong251,287
- 2318 Jiangyou251,202
- 2436 Xinchang240,747
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 Dinghai District 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 Dinghai District 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