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Sareyn, 
Iran
413,772 people lived in Sareyn in 2025. It is the 1359th largest of the world's 12,138 cities, and the 20th largest in Iran.
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 Sareyn'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 Sareyn grew
For every 10 people in Sareyn in 1975, there were 38 in 2025.
On the UN's projection it will have 494,091 people in 2050. It passed 250,000 people between 2000 and 2005.
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
Sareyn through your family’s years
Put in the years your family were born. You’ll see how many people lived in Sareyn in each of those years, and when each of them turned 30.
Iran · every city · 2025
Where it is
How to read this: Iran and its 210 cities in 2025, each a dot whose area is its number of people (the largest is Tehran). Sareyn 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, Sareyn covered 9 km², and buildings, roads and other built-up land covered 1.1 km² of it. That is 3 m² of built-up land for each person, about a square 2 by 2 metres.
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 Iran
Its share of Iran
Of every 1,000 people in Iran in 2025, 4 lived in Sareyn, which is 413,772 people.
How to read this: 1,000 squares stand for everyone in Iran, one square for every 1,000th person. Count the coloured ones and you have Sareyn's share; the grey remainder live somewhere else in the country.
Ranked by people · 2025
Cities of a similar size
In the world, 2025
- 1355 Moçâmedes Angola415,361
- 1356 Escondido United States415,167
- 1357 Batangas City Philippines415,103
- 1358 São José do Rio Preto Brazil414,406
- 1359 Sareyn413,772
- 1360 Charsadda Pakistan413,686
- 1361 Port Moresby Papua New Guinea413,223
- 1362 Hathras India413,122
- 1363 Ciudad del Este Paraguay412,725
In Iran, 2025
- 1073 Kerman517,216
- 1109 Hamedan498,337
- 1141 Yazd485,381
- 1274 Ardabil437,757
- 1359 Sareyn413,772
- 1467 Pishva388,154
- 1492 Bandar Abbas381,008
- 1539 Zanjan370,993
- 1544 Qarchak369,782
How to read this: the figure in front of a name is where that city stands among the 12,138 cities the UN counted in 2025, and each bar is its people, on one scale per list. Numbers are missing where a city has fewer than 300,000 people and so has no page of its own.
Apparatus
Sources and method
The figures for Sareyn 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 Sareyn 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