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Kas, 
Sudan
381,286 people lived in Kas in 2025. It is the 1491st largest of the world's 12,138 cities, and the 13th largest in Sudan.
Like every city on this site, Kas 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 Kas grew
Count 10 people in Kas in 1975 and the same count gives 64 in 2025.
On the UN's projection it will have 600,934 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: 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
Kas through your family’s years
Put in the years your family were born. You’ll see how many people lived in Kas in each of those years, and when each of them turned 30.
Sudan · every city · 2025
Where it is
How to read this: every dot is one of the 105 cities in Sudan in 2025, and a dot's area is how many people live there, the biggest being Khartoum. The ringed dot in colour is Kas; 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, Kas covered 21 km², and buildings, roads and other built-up land covered 3.2 km² of it. That is 8 m² of built-up land for each person, about a square 3 by 3 metres. Since 1975, its built-up land has grown to 2.1 times its size, and its people are 6.4 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 Sudan
Its share of Sudan
Of every 1,000 people in Sudan in 2025, 7 lived in Kas, which is 381,286 people.
How to read this: shrink Sudan to 1,000 people and this is what you get. The coloured squares are the ones who would live in Kas; 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
- 1487 Pohang-si South Korea382,368
- 1488 Guangyuan China381,738
- 1489 Las Palmas de Gran Canaria Spain381,670
- 1490 Changji/Sanji China381,391
- 1491 Kas381,286
- 1492 Bandar Abbas Iran381,008
- 1493 Mahilioŭ Belarus380,951
- 1494 Dongyang China380,793
- 1495 Mbale City Uganda380,565
In Sudan, 2025
- 1140 Timerein486,586
- 1297 Kosti431,504
- 1400 Wad Madanī403,988
- 1457 Kassala390,525
- 1491 Kas381,286
- 1808 Al-Qadarif317,258
- 2087 Saraf `Umrah278,467
- 2300 Rabak253,166
- 2308 Shendi252,344
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 Kas 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 Kas 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