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Iseyin, 
Nigeria
389,526 people lived in Iseyin in 2025. It is the 1464th largest of the world's 12,138 cities, and the 54th largest in Nigeria.
Like every city on this site, Iseyin 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 Iseyin grew
Where Iseyin had 10 people in 1975, it had 39.4 in 2025.
On the UN's projection it will have 601,893 people in 2050. It passed 250,000 people between 2005 and 2010.
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
Iseyin through your family’s years
Put in the years your family were born. You’ll see how many people lived in Iseyin in each of those years, and when each of them turned 30.
Nigeria · every city · 2025
Where it is
How to read this: Nigeria and its 457 cities in 2025, each a dot whose area is its number of people (the largest is Lagos). Iseyin 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, Iseyin covered 48 km², and buildings, roads and other built-up land covered 11 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 4.4 times its size, and its people are 3.9 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 Nigeria
Its share of Nigeria
Of every 1,000 people in Nigeria in 2025, 2 lived in Iseyin, which is 389,526 people.
How to read this: shrink Nigeria to 1,000 people and this is what you get. The coloured squares are the ones who would live in Iseyin; the grey ones are everybody else, in other cities, in towns and out in the country.
Ranked by people · 2025
Cities of a similar size
In the world, 2025
- 1460 Rangkasbitung Indonesia389,934
- 1461 Sikasso Mali389,804
- 1462 Hawrah Yemen389,641
- 1463 Tamkuhi Raj India389,533
- 1464 Iseyin389,526
- 1465 Phuket Thailand389,376
- 1466 Birimbal al Quadima Egypt389,333
- 1467 Pishva Iran388,154
- 1468 Ulyanovsk Russia387,698
In Nigeria, 2025
- 1392 Abakaliki406,105
- 1401 Asaba403,859
- 1413 Saki400,875
- 1427 Potiskum397,981
- 1464 Iseyin389,526
- 1496 KUNDULUN380,118
- 1506 Gamboru376,374
- 1531 Abonnema372,654
- 1535 Oyigbo371,913
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 Iseyin 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 Iseyin 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