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Busto Arsizio, 
Italy
302,759 people lived in Busto Arsizio in 2025. It is the 1893rd largest of the world's 12,138 cities, and the 11th largest in Italy.
That figure counts the whole built-up area, not the area Busto Arsizio governs, so it may be far from the number the city publishes about itself. How the UN measures a city.
Verified 2026-09-30 · 73 canaries
People · every five years · 1975 to 2050
How Busto Arsizio grew
Where Busto Arsizio had 10 people in 1975, it had 12.7 in 2025.
On the UN's projection it will have 285,751 people in 2050. It passed 250,000 people between 1990 and 1995.
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
Busto Arsizio through your family’s years
Put in the years your family were born. You’ll see how many people lived in Busto Arsizio in each of those years, and when each of them turned 30.
Italy · every city · 2025
Where it is
How to read this: Italy and its 95 cities in 2025, each a dot whose area is its number of people (the largest is Naples). Busto Arsizio 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, Busto Arsizio covered 103 km², and buildings, roads and other built-up land covered 28 km² of it. That is 94 m² of built-up land for each person, about a square 10 by 10 metres. Since 1975, its built-up land has grown by 57%, and its people have grown by 27%.
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 Italy
Its share of Italy
Of every 1,000 people in Italy in 2025, 5 lived in Busto Arsizio, which is 302,759 people.
How to read this: 1,000 squares, one for every 1,000th person in Italy; the coloured squares live in Busto Arsizio. 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
- 1889 Gao'an China304,111
- 1890 Tagum Philippines303,614
- 1891 Sers Al Layyan Egypt303,302
- 1892 Rajon Swerdlowski Russia302,890
- 1893 Busto Arsizio302,759
- 1894 Al-Santa Egypt302,572
- 1895 Hafar Al-Batin Saudi Arabia302,534
- 1896 Sivakasi India302,256
- 1897 Zhaotong China302,089
In Italy, 2025
- 1229 Catania453,376
- 1253 Bologna443,849
- 1298 Florence430,806
- 1426 Bergamo398,050
- 1893 Busto Arsizio302,759
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 Busto Arsizio 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 Busto Arsizio 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