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Zagreb, 
Croatia
623,091 people lived in Zagreb in 2025. It is the 865th largest of the world's 12,138 cities, and the largest in Croatia, where it is the capital.
Like every city on this site, Zagreb 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 Zagreb grew
Zagreb had about as many people in 2025 as in 1975.
On the UN's projection it will have 587,607 people in 2050.
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
Zagreb through your family’s years
Put in the years your family were born. You’ll see how many people lived in Zagreb in each of those years, and when each of them turned 30.
Croatia · every city · 2025
Where it is
How to read this: every dot is one of the 5 cities in Croatia in 2025, and a dot's area is how many people live there. The ringed dot in colour is Zagreb; 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, Zagreb covered 144 km², and buildings, roads and other built-up land covered 30 km² of it. That is 48 m² of built-up land for each person, about a square 7 by 7 metres. Since 1975, its built-up land has grown by 54%, and its people are about 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 Croatia
Its share of Croatia
Of every 100 people in Croatia in 2025, 16 lived in Zagreb, which is 623,091 people.
How to read this: 100 squares, one for every 100th person in Croatia; the coloured squares live in Zagreb. The grey rest live in other cities, in towns or in the countryside.
Ranked by people · 2025
Cities of a similar size
In the world, 2025
- 861 Seeb Oman630,072
- 862 Lokoja Nigeria629,547
- 863 Lviv Ukraine627,280
- 864 Chiang Mai Thailand626,629
- 865 Zagreb623,091
- 866 Pingxiang China623,055
- 867 Xiashan China622,080
- 868 Chiclayo Peru620,622
- 869 Bannu Pakistan620,328
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 Zagreb 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 Zagreb 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