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Long Thành, 
Vietnam
260,047 people lived in Long Thành in 2025. It is the 2244th largest of the world's 12,138 cities, and the 22nd largest in Vietnam.
Like every city on this site, Long Thành is counted as a built-up area seen from above rather than as a city government's territory. Why that changes the number.
Verified 2026-09-30 · 73 canaries
People · every five years · 1975 to 2050
How Long Thành grew
Count 10 people in Long Thành in 2005 and the same count gives 43.4 in 2025.
On the UN's projection it will have 378,370 people in 2050. It passed 250,000 people between 2020 and 2025. The UN first counts it as a city in 2005, when it passed 50,000 people.
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
Long Thành through your family’s years
Put in the years your family were born. You’ll see how many people lived in Long Thành in each of those years, and when each of them turned 30.
Vietnam · every city · 2025
Where it is
How to read this: every dot is one of the 137 cities in Vietnam in 2025, and a dot's area is how many people live there, the biggest being Ho Chi Minh City. The ringed dot in colour is Long Thành; 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, Long Thành covered 80 km², and buildings, roads and other built-up land covered 20 km² of it. That is 75 m² of built-up land for each person, about a square 9 by 9 metres. Since 2005, its built-up land has grown to 6.5 times its size, and its people are 4.3 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 Vietnam
Its share of Vietnam
Of every 1,000 people in Vietnam in 2025, 3 lived in Long Thành, which is 260,047 people.
How to read this: 1,000 squares stand for everyone in Vietnam, one square for every 1,000th person. Count the coloured ones and you have Long Thành's share; the grey remainder live somewhere else in the country.
Ranked by people · 2025
Cities of a similar size
In the world, 2025
- 2234 Areraj India261,142
- 2235 Sidi Bel Abbes Algeria261,103
- 2238 The Woodlands United States260,732
- 2243 Salinas [Santa Elena] Ecuador260,161
- 2244 Long Thành260,047
- 2245 Khalilabad India259,783
- 2246 Deir Ez Zor Syria259,771
- 2247 Hazel Dell United States259,716
- 2248 Jianhu China259,681
In Vietnam, 2025
- 1792 Quảng Ngãi320,907
- 1814 Buôn Ma Thuột316,052
- 1944 Quy Nhơn297,184
- 2027 Vinh Long287,685
- 2244 Long Thành260,047
- 2368 Phan Thiết246,665
- 2438 Phan Rang – Tháp Chàm240,480
- 2450 Đà Lạt239,212
- 3066 Củ Chi195,626
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 Long Thành are the UN's own, at five-year steps: an estimate for each of 2005 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 Long Thành 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