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Porto Velho, 
Brazil
422,943 people lived in Porto Velho in 2025. It is the 1322nd largest of the world's 12,138 cities, and the 39th largest in Brazil.
Like every city on this site, Porto Velho 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 Porto Velho grew
Where Porto Velho had 10 people in 1980, it had 73.5 in 2025.
On the UN's projection it will have 470,737 people in 2050. It passed 250,000 people between 1990 and 1995. The UN first counts it as a city in 1980, when it passed 50,000 people.
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
Porto Velho through your family’s years
Put in the years your family were born. You’ll see how many people lived in Porto Velho in each of those years, and when each of them turned 30.
Brazil · every city · 2025
Where it is
How to read this: Brazil and its 356 cities in 2025, each a dot whose area is its number of people (the largest is São Paulo). Porto Velho 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, Porto Velho covered 89 km², and buildings, roads and other built-up land covered 29 km² of it. That is 69 m² of built-up land for each person, about a square 8 by 8 metres. Since 1980, its built-up land has grown to 2.9 times its size, and its people are 7.3 times 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 Brazil
Its share of Brazil
Of every 1,000 people in Brazil in 2025, 2 lived in Porto Velho, which is 422,943 people.
How to read this: 1,000 squares, one for every 1,000th person in Brazil; the coloured squares live in Porto Velho. 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
- 1318 Ziyang China424,328
- 1319 Shivamogga India423,880
- 1320 Deoghar India423,674
- 1321 Jingdezhen China423,386
- 1322 Porto Velho422,943
- 1323 Sumgayit Azerbaijan422,836
- 1324 Shaoguan China422,509
- 1325 Bremen Germany422,414
- 1326 Niigata Japan422,238
In Brazil, 2025
- 1068 Juiz de Fora518,218
- 1172 Maringá473,708
- 1176 Macapá471,922
- 1193 Jundiaí465,531
- 1322 Porto Velho422,943
- 1344 Petrolina418,619
- 1358 São José do Rio Preto414,406
- 1368 Americana412,133
- 1425 Volta Redonda398,107
How to read this: the figure in front of a name is where that city stands among the 12,138 cities the UN counted in 2025, and each bar is its people, on one scale per list. Numbers are missing where a city has fewer than 300,000 people and so has no page of its own.
Apparatus
Sources and method
The figures for Porto Velho are the UN's own, at five-year steps: an estimate for each of 1980 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 Porto Velho 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