Topics
Pittsburgh, 
United States
385,498 people lived in Pittsburgh in 2025. It is the 1475th largest of the world's 12,138 cities, and the 50th 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 Pittsburgh grew
Count 10 people in Pittsburgh in 1975 and the same count gives 6.3 in 2025 — the city lost people.
On the UN's projection it will have 340,593 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
Pittsburgh through your family’s years
Put in the years your family were born. You’ll see how many people lived in Pittsburgh 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 Pittsburgh; 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, Pittsburgh covered 168 km², and buildings, roads and other built-up land covered 36 km² of it. That is 93 m² of built-up land for each person, about a square 10 by 10 metres. Since 1975, its built-up land is about the same size, and its people have fallen by 37%.
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 the United States
Its share of the United States
Of every 1,000 people in the United States in 2025, 1 lived in Pittsburgh, which is 385,498 people.
How to read this: shrink the United States to 1,000 people and this is what you get. The coloured squares are the ones who would live in Pittsburgh; 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
- 1471 Malemba-Nkulu Democratic Republic of the Congo386,790
- 1472 Changping China386,664
- 1473 Bournemouth United Kingdom386,557
- 1474 Antofagasta Chile385,812
- 1475 Pittsburgh385,498
- 1476 Yongkang China385,247
- 1477 Fuqing China385,081
- 1478 Gdansk Poland384,985
- 1479 Muzaffargarh Pakistan384,838
In the United States, 2025
- 1373 Albuquerque410,810
- 1397 North Richland Hills404,680
- 1419 Stockton398,470
- 1436 Colorado Springs394,888
- 1475 Pittsburgh385,498
- 1553 Plano367,716
- 1557 Riverside367,336
- 1569 Mission Viejo365,221
- 1597 Memphis356,215
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 Pittsburgh 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 Pittsburgh 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