Topics
Tucson, 
United States
422,107 people lived in Tucson in 2025. It is the 1329th largest of the world's 12,138 cities, and the 44th largest in the United States.
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 Tucson grew
For every 10 people in Tucson in 1995, there were 42 in 2025.
On the UN's projection it will have 649,805 people in 2050. It passed 250,000 people between 2005 and 2010. The UN first counts it as a city in 1995, when it passed 50,000 people.
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
Tucson through your family’s years
Put in the years your family were born. You’ll see how many people lived in Tucson in each of those years, and when each of them turned 30.
United States · every city · 2025
Where it is
How to read this: every dot is one of the 348 cities in the United States in 2025, and a dot's area is how many people live there, the biggest being New York City. The ringed dot in colour is Tucson; 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, Tucson covered 191 km², and buildings, roads and other built-up land covered 58 km² of it. That is 138 m² of built-up land for each person, about a square 12 by 12 metres. Since 1995, its built-up land has grown to 3.4 times its size, and its people are 4.2 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 the United States
Its share of the United States
Of every 1,000 people in the United States in 2025, 1 lived in Tucson, which is 422,107 people.
How to read this: 1,000 squares, one for every 1,000th person in the United States; the coloured squares live in Tucson. 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
- 1325 Bremen Germany422,414
- 1326 Niigata Japan422,238
- 1327 Jijiga Ethiopia422,225
- 1328 Longyan China422,165
- 1329 Tucson422,107
- 1330 Chișinău Moldova422,035
- 1331 Bathinda India421,753
- 1332 Bida Nigeria421,605
- 1333 Raiwind Pakistan421,524
In the United States, 2025
- 1202 West Valley City463,325
- 1212 Atlanta458,225
- 1284 Sterling Heights435,980
- 1302 Providence429,694
- 1329 Tucson422,107
- 1356 Escondido415,167
- 1373 Albuquerque410,810
- 1397 North Richland Hills404,680
- 1419 Stockton398,470
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 Tucson are the UN's own, at five-year steps: an estimate for each of 1995 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 Tucson 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