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Omsk, 
Russia
975,485 people lived in Omsk in 2025. It is the 530th largest of the world's 12,138 cities, and the 8th largest in Russia.
This is the UN's built-up area, drawn from satellite pictures and census maps rather than from the city limits, and the two can be a long way apart. The rule behind it.
Verified 2026-09-30 · 73 canaries
People · every five years · 1975 to 2050
How Omsk grew
For every 10 people in Omsk in 1975, there were 8.7 in 2025: it shrank.
On the UN's projection it will have 952,425 people in 2050.
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
Omsk through your family’s years
Put in the years your family were born. You’ll see how many people lived in Omsk in each of those years, and when each of them turned 30.
Russia · every city · 2025
Where it is
How to read this: every dot is one of the 254 cities in Russia in 2025, and a dot's area is how many people live there, the biggest being Moscow. The ringed dot in colour is Omsk; 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, Omsk covered 247 km², and buildings, roads and other built-up land covered 57 km² of it. That is 58 m² of built-up land for each person, about a square 8 by 8 metres. Since 1975, its built-up land has grown by 80%, and its people have fallen by 13%.
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 Russia
Its share of Russia
Of every 1,000 people in Russia in 2025, 7 lived in Omsk, which is 975,485 people.
How to read this: shrink Russia to 1,000 people and this is what you get. The coloured squares are the ones who would live in Omsk; 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
- 526 Tainan Taiwan979,987
- 527 Zhuzhou China979,244
- 528 Pekalongan Indonesia978,519
- 529 Arequipa Peru977,496
- 530 Omsk975,485
- 531 Guilin China973,970
- 532 Malanje Angola973,086
- 533 Glasgow United Kingdom970,320
- 534 Baoding China970,162
In Russia, 2025
- 432 Nizhny Novgorod1,196,944
- 449 Yekaterinburg1,148,237
- 456 Kazan1,132,941
- 479 Rostov-on-Don1,065,880
- 530 Omsk975,485
- 543 Samara955,599
- 589 Ufa880,583
- 591 Voronezh879,892
- 666 Chelyabinsk794,411
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 Omsk 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 Omsk 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