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Tacna, 
Peru
327,582 people lived in Tacna in 2025. It is the 1754th largest of the world's 12,138 cities, and the 10th largest in Peru.
The UN measures every city in the world the same way, by where the buildings are rather than where the boundary runs, so this figure and Tacna's own can differ widely. What counts as a city here.
Verified 2026-09-30 · 73 canaries
People · every five years · 1975 to 2050
How Tacna grew
Count 10 people in Tacna in 1980 and the same count gives 53.3 in 2025.
On the UN's projection it will have 371,948 people in 2050. It passed 250,000 people between 2005 and 2010. 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: 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
Tacna through your family’s years
Put in the years your family were born. You’ll see how many people lived in Tacna in each of those years, and when each of them turned 30.
Peru · every city · 2025
Where it is
How to read this: Peru and its 43 cities in 2025, each a dot whose area is its number of people (the largest is Lima). Tacna 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, Tacna covered 48 km², and buildings, roads and other built-up land covered 12 km² of it. That is 38 m² of built-up land for each person, about a square 6 by 6 metres. Since 1980, its built-up land has grown to 5.9 times its size, and its people are 5.3 times as many.
How to read this: pale is the whole of the city's land; the stronger square inside it is what is actually built on. The three are drawn to the same scale, so a larger square really is more land, and hatching means the year is the UN's projection rather than a count.
Of every 100 people in Peru
Its share of Peru
Of every 1,000 people in Peru in 2025, 9 lived in Tacna, which is 327,582 people.
How to read this: shrink Peru to 1,000 people and this is what you get. The coloured squares are the ones who would live in Tacna; 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
- 1750 Ya'an China328,287
- 1751 Tezpur India328,217
- 1752 Puri India328,196
- 1753 Balıkesir Türkiye328,080
- 1754 Tacna327,582
- 1755 Baoshan China327,416
- 1756 Girga Egypt327,081
- 1757 Xiangtan China326,965
- 1758 Bhadohi India326,738
In Peru, 2025
- 1133 Cusco490,968
- 1177 Piura471,521
- 1179 Huancayo470,685
- 1635 Chimbote350,281
- 1754 Tacna327,582
- 1875 Juliaca306,990
- 2111 Pucallpa274,639
- 2775 Ica213,644
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 Tacna 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 Tacna 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